<SUBMISSION>
<ACCESSION-NUMBER>0000950135-06-001759
<TYPE>8-K
<PUBLIC-DOCUMENT-COUNT>2
<PERIOD>20060321
<ITEMS>1.01
<ITEMS>3.03
<ITEMS>8.01
<FILING-DATE>20060323
<DATE-OF-FILING-DATE-CHANGE>20060323
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>AAVID THERMAL TECHNOLOGIES INC
<CIK>0001003481
<ASSIGNED-SIC>3679
<IRS-NUMBER>020466826
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>033-99232
<FILM-NUMBER>06706736
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>ONE EAGLE SQUARE
<STREET2>SUITE 509
<CITY>CONCORD
<STATE>NH
<ZIP>03301
<PHONE>6032241117
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>P O BOX 400
<CITY>LACONIA
<STATE>NH
<ZIP>03247-0400
</MAIL-ADDRESS>
</FILER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>b59978ate8vk.htm
<DESCRIPTION>AAVID THERMAL TECHNOLOGIES, INC.
<TEXT>
<HTML>
<HEAD>
<TITLE>e8vk</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">



<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>




<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>WASHINGTON, D.C. 20549</B>
</DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM 8-K</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>CURRENT REPORT<BR>
PURSUANT TO SECTION 13 OR 15(d) OF THE<BR>
SECURITIES EXCHANGE ACT OF 1934<BR>
&nbsp;</B>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">Date of Report (Date of earliest event reported): &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>March&nbsp;21, 2006</B><BR>
&nbsp;
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="100%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="100%">&nbsp;</TD>
</TR>
<TR style="font-size: 24pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>AAVID THERMAL TECHNOLOGIES, INC.</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top">(Exact Name of Registrant as Specified in its Charter)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Delaware</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>0-27308</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>02-0466826</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top">(State or Other Jurisdiction<BR>
of Incorporation)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Commission<BR>
File Number)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(IRS Employer<BR>
Identification No.)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD nowrap align="center"><B>One Eagle Square, Suite 509</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Concord, New Hampshire</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>03301</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top">(Address of Principal Executive Offices)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Zip Code)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt">Registrant&#146;s telephone number, including area code: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U><B>(603)&nbsp;224-1117</B></U>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">&nbsp;
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="100%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="100%">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Not Applicable</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top">(Former Name or Former Address, if Changed Since Last Report)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>
<DIV align="left" style="font-size: 10pt; margin-top: 6pt"><FONT style="font-family: Wingdings">&#111;</FONT><FONT style="font-family: Wingdings">&#032;</FONT> Written communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425)
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt"><FONT style="font-family: Wingdings">&#111;</FONT><FONT style="font-family: Wingdings">&#032;</FONT> Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12)
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt"><FONT style="font-family: Wingdings">&#111;</FONT><FONT style="font-family: Wingdings">&#032;</FONT> Pre-commencement communications pursuant to Rule&nbsp;14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt"><FONT style="font-family: Wingdings">&#111;</FONT><FONT style="font-family: Wingdings">&#032;</FONT> Pre-commencement communications pursuant to Rule&nbsp;13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
</DIV>


<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>





<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">








<!-- TOC -->
<A name="toc"><DIV align="CENTER" style="page-break-before:always"><U><B>TABLE OF CONTENTS</B></U></DIV></A>

<P><CENTER>
<TABLE border="0" width="90%" cellpadding="0" cellspacing="0">
<TR>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="76%"></TD>
</TR>
<TR><TD></TD><TD colspan="8"><A HREF="#000">Item&nbsp;1.01 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Entry into a Material Definitive Agreement.</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#001">Item&nbsp;3.03. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Material Modification to Rights of Security Holders.</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#002">Item&nbsp;8.01. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other Events.</A></TD></TR>
<TR><TD colspan="9"><A HREF="#003">SIGNATURES</A></TD></TR>
<TR><TD colspan="9"><A HREF="#004">Exhibit&nbsp;Index</A></TD></TR>
<TR><TD colspan="9"><A HREF="b59978atexv4w1.htm">EX-4.1 THIRD SUPPLEMENTAL INDENTURE</A></TD></TR>
</TABLE>
</CENTER>
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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>




<!-- link2 "Item&nbsp;1.01 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Entry into a Material Definitive Agreement." -->
<DIV align="left"><A NAME="000"></A></DIV>





<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;1.01 </B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Entry into a Material Definitive Agreement.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;On March&nbsp;21, 2006, Aavid Thermal Technologies, Inc. (&#147;<U>ATTI</U>&#148;) entered into a Third
Supplement Indenture dated as of March&nbsp;21, 2006 (the &#147;<U>Supplemental Indenture</U>&#148;) with the
Guarantors named on the signature page thereto and Deutsche Bank Trust Company Americas (f/k/a
Bankers Trust Company), a New York banking corporation, as trustee, to the Indenture dated as of
February&nbsp;2, 2000 (as amended, the &#147;<U>Indenture</U>&#148;), relating to ATTI&#146;s 12-3/4% Senior
Subordinated Notes due 2007 (the &#147;<U>Notes</U>&#148;). The Supplemental Indenture was entered into in
connection with ATTI&#146;s tender offer and consent solicitation with respect to the Notes, which was
commenced on March&nbsp;8, 2006.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Supplemental Indenture amends the Indenture governing the Notes to (i)&nbsp;eliminate
substantially all of the restrictive covenants and reporting covenants and certain events of
default contained in the Indenture and (ii)&nbsp;amend the minimum notice requirement in respect of a
redemption of Notes so that ATTI may within five days redeem any Notes that remain outstanding
following the mergers (as defined below) and tender offer.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The amendments to the Indenture pursuant to the Supplemental Indenture will not become
effective until the satisfaction of various conditions, including but not limited to, the
consummation of proposed mergers (collectively, the &#147;<U>mergers</U>&#148;) pursuant to which ANSYS,
Inc. and certain of its affiliates will acquire ATTI and the computational fluid dynamics software
business operated by ATTI&#146;s wholly owned subsidiary, Fluent Inc. Consummation of the mergers is
also subject to various customary conditions, including, among others, expiration or termination of
the applicable Hart-Scott-Rodino waiting period and the absence of any material adverse change with
respect to each party&#146;s business.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The foregoing description of the Supplemental Indenture does not purport to be complete and is
qualified in its entirety by reference to the Supplemental Indenture filed as Exhibit&nbsp;4.1 and
incorporated by reference.
</DIV>

<!-- link2 "Item&nbsp;3.03. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Material Modification to Rights of Security Holders." -->
<DIV align="left"><A NAME="001"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;3.03. </B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Material Modification to Rights of Security Holders.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;See description under &#147;Item&nbsp;1.01 Entry into a Material Definitive Agreement&#148; above regarding
the execution on March&nbsp;21, 2006 of the Supplemental Indenture relating to the Notes.
</DIV>

<!-- link2 "Item&nbsp;8.01. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other Events." -->
<DIV align="left"><A NAME="002"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;8.01. </B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Other Events.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;As of 5:00 p.m., New York City time on Tuesday, March&nbsp;21, 2006, which was the deadline for
holders to tender their Notes in order to receive the consent payment of $25.00 per $1,000
principal amount of the Notes, ATTI had received the requisite tenders and consents from holders of
$123,759,000 in aggregate principal amount of the Notes, representing approximately 99.96% of the
outstanding Notes, in connection with ATTI&#146;s
</DIV>

<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">tender offer and consent solicitation for the Notes
which was commenced on March&nbsp;8, 2006.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The amount tendered represents a sufficient number of consents required to approve the
Supplemental Indenture described under &#147;Item&nbsp;1.01 Entry into a Material Definitive Agreement&#148;
above.
</DIV>

<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="12%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="86%">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD nowrap align="left"><B>Exhibit No.</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left"><B>Description</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Third Supplemental Indenture dated as of March&nbsp;21, 2006 among Aavid Thermal
Technologies, Inc. (&#147;<U>ATTI</U>&#148;), the Guarantors named on the signature page
thereto and Deutsche Bank Trust Company Americas (f/k/a Bankers Trust Company), a New
York banking corporation, as trustee, relating to ATTI&#146;s 12-3/4% Senior Subordinated
Notes due 2007.</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<!-- link1 "SIGNATURES" -->
<DIV align="left"><A NAME="003"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURES</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly
caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
</DIV>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">AAVID THERMAL TECHNOLOGIES, INC.<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>

<TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/
John W. Mitchell&nbsp;
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD align="left">John W. Mitchell&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD align="left">General Counsel&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Date:
March 23, 2006
</DIV>


<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">


<!-- link1 "Exhibit&nbsp;Index" -->
<DIV align="left"><A NAME="004"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>Exhibit&nbsp;Index</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="12%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="86%">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD nowrap align="left"><B><U>Exhibit No</U>.</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left"><B><U>Description</U></B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Third Supplemental Indenture dated as of March&nbsp;21, 2006 among Aavid Thermal
Technologies, Inc. (&#147;<U>ATTI</U>&#148;), the Guarantors named on the signature page
thereto and Deutsche Bank Trust Company Americas (f/k/a Bankers Trust Company), a New
York banking corporation, as trustee, relating to ATTI&#146;s 12-3/4% Senior Subordinated
Notes due 2007.</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<P align="center" style="font-size: 10pt">&nbsp;
</DIV>


</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.1
<SEQUENCE>2
<FILENAME>b59978atexv4w1.htm
<DESCRIPTION>EX-4.1 THIRD SUPPLEMENTAL INDENTURE
<TEXT>
<HTML>
<HEAD>
<TITLE>exv4w1</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">



<DIV align="right" style="font-size: 10pt; margin-top: 12pt"><B>Exhibit&nbsp;4.1</B><BR>
&nbsp;
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>THIRD SUPPLEMENTAL INDENTURE</B><BR>
&nbsp;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;THIRD
SUPPLEMENTAL INDENTURE, dated as of March&nbsp;21, 2006 (this &#147;Supplemental Indenture&#148;),
among Aavid Thermal Technologies, Inc., a Delaware corporation (the &#147;Company&#148;), the Guarantors
named on the signature page hereto (the &#147;Guarantors&#148;) and Deutsche Bank Trust Company Americas
(f/k/a Bankers Trust Company), a New York banking corporation, as trustee under the Indenture
referred to below (the &#147;Trustee&#148;).
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WHEREAS, the Company and the Guarantors have heretofore executed and delivered to the Trustee
an Indenture dated as of February&nbsp;2, 2000, as amended by the First Supplemental Indenture dated as
of April&nbsp;30, 2001 and the Second Supplemental Indenture dated as of February&nbsp;14, 2006 (as so
amended, the &#147;Indenture&#148;), providing for the creation and issuance of the Company&#146;s 12-3/4% Senior
Subordinated Notes due 2007 (the &#147;Notes&#148;) (capitalized terms used herein but not otherwise defined
have the meanings ascribed thereto in the Indenture); and
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WHEREAS, in accordance with Section&nbsp;8.02 of the Indenture, the Trustee and the Company and the
Guarantors, when authorized by a Board Resolution, together with the written consent of the Holders
of at least a majority in aggregate principal amount of the Notes outstanding as of the date
hereof, may amend or waive certain terms and covenants in the Indenture as described below; and
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WHEREAS, the Company and each of the Guarantors are undertaking to execute and deliver this
Supplemental Indenture to amend certain terms and covenants in the Indenture in connection with the
Offer to Purchase and Consent Solicitation Statement of the Company dated March&nbsp;8, 2006 and any
amendments, modifications or supplements thereto (the &#147;Offer and Consent Solicitation&#148;); and
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WHEREAS, this Supplemental Indenture has been duly authorized by all necessary corporate
action on the part of the Company and each of the Guarantors.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;NOW THEREFORE, in consideration of the foregoing and for other good and valuable
consideration, the receipt of which is hereby acknowledged, the Company, each of the Guarantors and
the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders as
follows:
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt">ARTICLE I
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><U>Amendments and Waivers</U>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 1.01. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Applicability of Certain Indenture Provisions to the Offer and Consent
Solicitation</U>. The application of the provisions of Article&nbsp;IV of the Indenture are hereby
waived to the extent that such provisions might otherwise interfere with the ability to enter into
agreements contemplated by, and to consummate, the Offer and Consent Solicitation.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 1.02. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Amendments to the Indenture</U>. The amendments to the Indenture set forth
herein shall become effective upon the execution and delivery by the Trustee, the Company and the
Guarantors of this Supplemental Indenture, and shall become operative at the time the
</DIV>

<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Company first
accepts for payment Notes validly tendered pursuant to the Offer and Consent Solicitation and
deposits with Deutsche Bank Trust Company Americas, as Depositary under the Offer and Consent
Solicitation, an amount of money sufficient to pay for such Notes and make all consent payments
required under the Offer and Consent Solicitation:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U><I>Definitions</I></U>.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 3%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The definition of &#147;Restricted Subsidiary&#148; set forth in Section&nbsp;1.01 of the
Indenture is hereby amended in its entirety to read as follows:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 3%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#147;&#147;<U>Restricted Subsidiary</U>&#148; means a Subsidiary of the Company other than an
Unrestricted Subsidiary.&#148;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 3%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The definition of &#147;Senior Credit Facility&#148; set forth in Section&nbsp;1.01 of the
Indenture is hereby amended in its entirety to read as follows:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 3%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#147;&#147;<U>Senior Credit Facility</U>&#148; means the Credit Agreement, by and among ANSYS, Inc.,
the lenders party thereto in their capacities as lenders thereunder, Bank of America, N.A.,
as administrative agent, and Banc of America Securities LLC, as sole lead arranger and sole
book manager, together with the related documents thereto (including, without limitation,
any guarantee agreements and security documents), in each case as such agreements may be
amended (including any amendment and restatement thereof), supplemented or otherwise
modified from time to time, including any agreement extending the maturity of, refinancing,
replacing or otherwise restructuring (including increasing the amount of available
borrowings thereunder or adding Restricted Subsidiaries of ANSYS, Inc. as additional
borrowers or guarantors thereunder) all or any portion of the Indebtedness under such
agreement or any successor or replacement agreement and whether by the same or any other
agent, lender or group of lenders.&#148;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 3%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The definition of &#147;Unrestricted Subsidiary&#148; set forth in Section&nbsp;1.01 of the
Indenture is hereby amended in its entirety to read as follows:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 3%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#147;&#147;<U>Unrestricted Subsidiary</U>&#148; means (1)&nbsp;any Subsidiary of an Unrestricted
Subsidiary and (2)&nbsp;any Subsidiary of the Company which is classified after the Issue Date as
an Unrestricted Subsidiary by a Board Resolution, until such time as the Board of Directors
of the Company may designate any Unrestricted Subsidiary or any Person that is to become a
Subsidiary as a Restricted Subsidiary.&#148;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 3%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All definitions set forth in the Indenture that relate to defined terms used
solely in sections deleted by this Supplemental Indenture are hereby deleted in their
entirety.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U><I>Redemption Notices</I></U>.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 3%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;3.01 of the Indenture is hereby amended in its entirety to read as follows:
</DIV>

<P align="center" style="font-size: 10pt">2
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&#147;Section&nbsp;3.01. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Notices to Trustee</U>.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">If the Company elects to redeem Notes pursuant to paragraph 7 of the Notes, at
least 5&nbsp;days prior to the Redemption Date or during such other period as the Trustee
may agree to, the Company shall notify the Trustee in writing of the Redemption
Date, the principal amount of Notes to be redeemed and the Redemption Price, and
deliver to the Trustee an Officers&#146; Certificate stating that such redemption will
comply with the conditions contained herein and in the Notes, as appropriate.&#148;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 3%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The first paragraph of Section&nbsp;3.03 of the Indenture is hereby amended in its
entirety to read as follows:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&#147;Section&nbsp;3.03. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Notice of Redemption</U>.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">Notice of redemption shall be mailed by first class mail at least 5 but not
more than 60 calendar days before the Redemption Date to each Holder of Notes to be
redeemed at its registered address. If any Note is to be redeemed in part only, the
notice of redemption that relates to such Note shall state the portion of the
principal amount thereof to be redeemed.&#148;
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U><I>Covenants</I></U>. The Indenture is hereby amended to delete Sections&nbsp;4.02, 4.03, 4.05,
4.09, 4.10, 4.11, 4.14, 4.15, 4.16, 4.18, 4.19, 4.20, 4.21, 4.22 and 4.24 and clauses (a)&nbsp;and (c)
of Section&nbsp;4.04 in their entirety and all references thereto contained elsewhere in the Indenture
in their entirety.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U><I>Successor Corporation</I></U>. Section&nbsp;5.01 of the Indenture is hereby amended to
delete all text set forth therein following clause (1)&nbsp;thereof and all references thereto contained
elsewhere in the Indenture in their entirety.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U><I>Events of Default</I></U>. Section&nbsp;6.01 of the Indenture is hereby amended to delete
clauses (d), (e), (f), (g)&nbsp;and (h)&nbsp;thereof and all references thereto contained elsewhere in the
Indenture in their entirety.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(f)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U><I>Defeasance</I></U>. Section&nbsp;9.04 of the Indenture is hereby amended to delete clauses
(b), (c), (d), (f), (h)&nbsp;and (j)&nbsp;thereof and all references thereto contained elsewhere in the
Indenture in their entirety.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(g)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U><I>Notices</I></U>. The notice information for the Company set forth in Section&nbsp;12.02 of the
Indenture is hereby amended in its entirety to read as follows:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#147;If to the Company:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 10%">Aavid Thermal Technologies, Inc.<BR>
275 Technology Drive<BR>
Southpointe<BR>
Cannonsburg, PA 15317<BR>
Attention: Sheila S. DiNardo, Esq.

</DIV>

<P align="center" style="font-size: 10pt">3
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 10%">Tel: (724)&nbsp;746-3304<BR>
Fax: (724)&nbsp;514-3609

</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Copy to:
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 10%">Goodwin Procter LLP<BR>
Exchange Place<BR>
53 State Street<BR>
Boston, MA<BR>
Attention: &nbsp;&nbsp;John R. LeClaire<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Joseph L. Johnson III<BR>
Tel: (617)&nbsp;570-1000<BR>
Fax: (617)&nbsp;523-1231

</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(h)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U><I>Exhibits</I></U>. Exhibit&nbsp;B to the Indenture, the form of Exchange Notes, is hereby
replaced in its entirety with Exhibit&nbsp;B attached hereto.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U><I>Section&nbsp;References</I></U>. All references in the Indenture to sections, definitions and
exhibits amended hereby shall mean such section, definitions and exhibits as amended or further
amended by this Supplemental Indenture.
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt">ARTICLE II
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><U>Miscellaneous</U>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 2.01. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Ratification of Indenture; Supplemental Indentures Part of Indenture</U>.
Except as expressly amended hereby, the Indenture is in all respects ratified and confirmed and all
the terms, conditions and provisions thereof shall remain in full force and effect. This
Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder of
Notes heretofore or hereafter authenticated and delivered shall be bound hereby.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 2.02. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Trustee Makes No Representation</U>. The recitals contained herein shall
be taken as the statements of the Company and the Guarantors, and the Trustee assumes no
responsibility for their correctness. The Trustee makes no representation as to the validity or
sufficiency of this Supplemental Indenture.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 2.03. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Governing Law</U>. <B>THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, AS APPLIED TO CONTRACTS MADE AND
PERFORMED WITHIN THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW. EACH OF
THE PARTIES HERETO AGREES TO SUBMIT TO THE JURISDICTION OF THE COURTS OF THE STATE OF NEW YORK IN
ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS SUPPLEMENTAL INDENTURE.</B>
</DIV>

<P align="center" style="font-size: 10pt">4
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 2.04. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Counterparts</U>. The parties may sign any number of copies of this
Supplemental Indenture. Each signed copy shall be an original, but all of them together represent
the same agreement.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 2.05. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Severability</U>. In case any provision of this Supplemental Indenture
shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the
remaining provisions hereof or of the Indenture shall not in any way be affected or impaired
thereby.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 2.06. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Effects of Headings</U>. The section headings herein are for convenience
only and shall not affect the construction thereof.
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt">&#091;Remainder of page intentionally left blank&#093;
</DIV>


<P align="center" style="font-size: 10pt">5
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly
executed all as of the date first above written.
</DIV>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">AAVID THERMAL TECHNOLOGIES, INC.<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/  John W. Mitchell
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD align="left">John W. Mitchell&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD align="left">Vice President&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left"><B>Guarantors:</B><BR>
<BR>
<BR>
FLUENT INC. (f/k/a Fluent Holdings, Inc.)<BR>
AAVID THERMAL PRODUCTS, INC.<BR>
THERMALLOY INVESTMENT CO., INC.<BR>
THERMALLOY, INC.<BR>
AAVID THERMALLOY, LLC<BR>
APPLIED THERMAL TECHNOLOGIES, LLC<BR>
AAVID THERMALLOY SW, LLC<BR>
AAVID THERMALLOY OF TEXAS, LLC<BR>
ENDUCTIVE SOLUTIONS, INC.<BR>
TROY III, INC.<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/  John W. Mitchell
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD align="left">John W. Mitchell&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD align="left">Vice President&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>

</TABLE>

<P align="center" style="font-size: 10pt">6
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>

<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">DEUTSCHE BANK TRUST COMPANY AMERICAS (f/k/a Bankers
Trust Company), as Trustee<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" align="left">Deutsche Bank National Trust Company
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>

<TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/
David Contino
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;</TD>
    <TD align="left">David Contino</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;</TD>
    <TD align="left">Assistant Vice President</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>

<TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/
Yana Kalachikova
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD align="left">Yana Kalachikova</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD align="left">Assistant Vice President</TD>
    <TD>&nbsp;</TD>
</TR>

</TABLE>

<P align="center" style="font-size: 10pt">7
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>

</TABLE>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><U>EXHIBIT B</U><BR>
&nbsp;
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">THIS NOTE IS A GLOBAL NOTE WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS
REGISTERED IN THE NAME OF A DEPOSITORY OR A NOMINEE OF A DEPOSITORY OR A SUCCESSOR DEPOSITORY.
THIS NOTE IS NOT EXCHANGEABLE FOR NOTES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE
DEPOSITORY OR ITS NOMINEE EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO
TRANSFER OF THIS NOTE (OTHER THAN A TRANSFER OF THIS NOTE AS A WHOLE BY THE DEPOSITORY TO A NOMINEE
OF THE DEPOSITORY OR BY A NOMINEE OF THE DEPOSITORY TO THE DEPOSITORY OR ANOTHER NOMINEE OF THE
DEPOSITORY) MAY BE REGISTERED EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">TRANSFERS OF THIS GLOBAL NOTE SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, AND
TRANSFERS OF INTERESTS IN THIS GLOBAL NOTE SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH
THE RESTRICTIONS SET FORTH IN SECTION 2.16 OF THE INDENTURE.
</DIV>


<DIV align="right" style="font-size: 10pt; margin-top: 12pt">ISIN No.:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">AAVID THERMAL TECHNOLOGIES, INC.
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">&nbsp;
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">12-3/4% SENIOR SUBORDINATED NOTE DUE 2007, SERIES B
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">&nbsp;
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="47%"></TD>
    <TD width="5%"></TD>
    <TD width="47%"></TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="left" valign="top">No.
</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">$&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;AAVID THERMAL TECHNOLOGIES, INC., a Delaware corporation (the &#147;Company,&#148; which term includes
any successor entity), for value received promises to pay to &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; or registered assigns, the
principal sum of $________ on &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;, 2007.
</DIV>
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Interest Payment Dates: February 1 and August&nbsp;1, commencing August&nbsp;1, 2000.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Record Dates: January&nbsp;15 and July&nbsp;15.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Reference is made to the further provisions of this Note contained herein and the Indenture (as
defined), which will for all purposes have the same effect as if set forth at this place.
</DIV>


<P align="center" style="font-size: 10pt">8
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN WITNESS WHEREOF, the Company has caused this Note to be signed manually or by facsimile by
its duly authorized officers.
</DIV>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">AAVID THERMAL TECHNOLOGIES, INC.<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>

</TABLE>

<P align="center" style="font-size: 10pt">9
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>

</TABLE>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>Certificate of Authentication</B>
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This is one of the 12 <FONT style="font-size: 70%"><SUP>3</SUP></FONT>/<FONT style="font-size: 60%">4</FONT>% Senior Subordinated Notes due 2007, Series&nbsp;B, referred to in the
within-mentioned Indenture.
</DIV>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">DEUTSCHE BANK TRUST COMPANY AMERICAS,<BR>
not in its individual capacity, but solely as Trustee<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" align="left">Deutsche Bank National Trust Company
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">&nbsp;&nbsp;</TD>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>

</TABLE>

<P align="center" style="font-size: 10pt">10
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>

</TABLE>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt">(REVERSE OF SECURITY)
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">12 <FONT style="font-size: 70%"><SUP>3</SUP></FONT>/<FONT style="font-size: 60%">4</FONT>% SENIOR SUBORDINATED NOTE DUE 2007, SERIES B<BR>
&nbsp;
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">1. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Interest</U>. AAVID THERMAL TECHNOLOGIES, INC., a Delaware corporation (the
&#147;<U>Company</U>&#148;), promises to pay interest on the principal amount of this Note at the rate <I>per
annum </I>shown above. Interest on the Notes will accrue from the most recent date on which interest
has been paid or, if no interest has been paid, from the date of the original issuance of the
Notes. The Company will pay interest semi-annually in arrears on each Interest Payment Date,
commencing August&nbsp;1, 2000. Interest will be computed on the basis of a 360-day year of twelve
30-day months.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">The Company shall pay interest on overdue principal and on overdue installments of interest
(without regard to any applicable grace periods) to the extent lawful from time to time on demand
at the rate borne by the Notes.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">2. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Method of Payment</U>. The Company shall pay interest on the Notes (except defaulted
interest) to the Persons who are the registered Holders at the close of business on July&nbsp;15 or
January&nbsp;15 preceding the Interest Payment Date (whether or not such day is a Business Day) even if
the Notes are cancelled on registration of transfer or registration of exchange after such Record
Date. Holders must surrender Notes to a Paying Agent to collect principal payments. Payments of
principal and premium, if any, will be made (on presentation of such Notes if in certificated form)
in money of the United States that at the time of payment is legal tender for payment of public and
private debts; <I>provided</I>, <I>however</I>, that the Company may pay principal, premium, if any, and interest
by check payable in such money. The Company may deliver any such interest payment to the Paying
Agent or to a Holder at the Holder&#146;s registered address.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">3. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Paying Agent and Registrar</U>. Initially, Deutsche Bank Trust Company Americas, a banking
organization organized under the laws of New York (the &#147;<U>Trustee</U>&#148;), will act as Paying Agent
and Registrar. The Company may change any Paying Agent, Registrar or co-Registrar without notice
to the Holders. Neither the Company nor any of its Subsidiaries or Affiliates may act as Paying
Agent but may act as Registrar or co-Registrar.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">4. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Indenture</U>. The Company issued this Note under an Indenture, dated as of February&nbsp;2,
2000, as amended by the First Supplemental Indenture dated as of April&nbsp;30, 2001, the Second
Supplemental Indenture, dated as of February&nbsp;14, 2006, and the Third Supplemental Indenture dated
as of March &#95;&#95;&#95;, 2006 (as supplemented, the &#147;<U>Indenture</U>&#148;), by and among the Company, the
Guarantors and the Trustee. This Note is one of a duly authorized issue of Notes of the Company
designated as its 12 <FONT style="font-size: 70%"><SUP>3</SUP></FONT>/<FONT style="font-size: 60%">4</FONT>% Senior Subordinated Notes due 2007, Series&nbsp;B (the &#147;<U>Exchange
Notes</U>&#148;), issued in exchange for the initial 12 <FONT style="font-size: 70%"><SUP>3</SUP></FONT>/<FONT style="font-size: 60%">4</FONT>% Senior Subordinated Notes due 2007, Series&nbsp;A
(the &#147;<U>Initial Notes</U>&#148; and, together with the Exchange Notes, the &#147;<U>Notes</U>&#148;). The
Notes are limited in aggregate principal amount to $150,000,000. Capitalized terms herein are used
as defined in the Indenture unless otherwise defined herein. The terms of the Notes include those
stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture
Act of 1939 (15 U.S. Code &#167;&#167; 77aaa-77bbbb) (the &#147;<U>TIA</U>&#148;), as in effect on the date of the
Indenture. Notwithstanding anything to the contrary herein, the Notes are subject to all such
terms, and Holders of Notes are referred to the Indenture and the TIA for a statement of them.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">5. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Subordination</U>. Except to the extent set forth in paragraph 10, the Notes are general
</DIV>



<P align="center" style="font-size: 10pt">11
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">unsecured obligations of the Company and subordinated in right of payment, in the manner and to the
extent set forth in the Indenture, to the prior payment in full in cash of all Senior Indebtedness
of the Company, whether outstanding on the date of the Indenture or thereafter created, incurred,
assumed or guaranteed. Each Holder by his acceptance hereof agrees to be bound by such provisions
and authorizes and expressly directs the Trustee, on his behalf, to take such action as may be
necessary or appropriate to effectuate the subordination provided for in the Indenture and appoints
the Trustee his attorney-in-fact for such purposes.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">6. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Guarantee</U>. The obligations of the Company hereunder are guaranteed on a senior
subordinated basis by the Guarantors. Each Guarantee by a Guarantor is subordinated in right of
payment to all Guarantor Senior Indebtedness of such Guarantor to the same extent that the Notes
are subordinated to Senior Indebtedness of the Company.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">7. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Redemption</U>.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">(a) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Notes will be redeemable at the option of the Company, in whole or in part, during the
24-month period beginning February&nbsp;1, 2004 at a price equal to 100% of the principal amount
thereof, plus and applicable Make Whole Premium, and thereafter at 102% of the principal amount, in
each case, with accrued and unpaid interest, if any, to the date of redemption; <I>provided, however</I>,
that at maturity the Notes shall be redeemable at 100% of principal amount outstanding.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">For the purposes of the foregoing, the &#147;Make Whole Premium&#148; means, with respect to a Note, an
amount equal to the excess, if any, of (1)&nbsp;the present value as of the date of such prepayment of
the remaining semi-annual interest payments, if any, and the principal payment including premium
due on such Note as if such Note were redeemed on February&nbsp;1, 2006, computed using a discount rate
equal to the Treasury Rate plus 75 basis points, over (2)&nbsp;the outstanding principal amount of such
Note. In no case shall the Make Whole Premium be negative.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">(b) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Optional Redemption Upon Public Equity Offerings</U>. Notwithstanding the foregoing, the
Company may redeem in the aggregate up to 35% of the original principal amount of Notes at any time
and from time to time prior to February&nbsp;2, 2003 at a Redemption Price equal to 112.75% of the
aggregate principal amount so redeemed, plus accrued and unpaid interest, if any, to the Redemption
Date out of the Net Proceeds of one or more Public Equity Offerings; provided that
</DIV>


<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">


<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(1)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>at least 65% of the principal amount of Notes originally issued remains outstanding
immediately after the occurrence of any such redemption, and</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(2)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>any such redemption occurs within 60&nbsp;days following the closing of any such Public Equity
Offering.</TD>
</TR>

</TABLE>
</DIV>
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">8. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Notice of Redemption</U>. Notice of redemption under paragraphs 6(a) and 6(b) of this Note
will be mailed at least 5&nbsp;days but not more than 60&nbsp;days before the Redemption Date to each Holder
of Notes to be redeemed at such Holder&#146;s registered address.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Except as set forth in the Indenture, if monies for the redemption of the Notes called for
redemption shall have been deposited with the Paying Agent for redemption on such Redemption Date,
then, unless the Company defaults in the payment of such Redemption Price plus accrued interest, if
any, the Notes called for redemption will cease to bear interest from and after such
</DIV>



<P align="center" style="font-size: 10pt">12
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Redemption
Date and the only right of the Holders of such Notes will be to receive payment of the Redemption
Price plus accrued interest, if any.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">9. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Offers to Purchase</U>. The Indenture provides that, after certain Asset Sales and upon the
occurrence of a Change of Control (as defined in the Indenture), and subject to further limitations
contained therein, the Company will make an offer to purchase certain amounts of the Notes in
accordance with the procedures set forth in the Indenture.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">10. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Denominations; Transfer; Exchange</U>. The Notes are in registered form, without coupons,
in denominations of $1,000 and integral multiples thereof. A Holder shall register the transfer or
exchange of Notes in accordance with the Indenture. The Registrar may require a Holder, among
other things, to furnish appropriate endorsements and transfer documents and to pay certain
transfer taxes or similar governmental charges payable in connection therewith as permitted by the
Indenture. The Registrar need not register the transfer of or exchange of any Notes or portions
thereof selected for redemption.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">11. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Persons Deemed Owners</U>. The registered Holder of a Note shall be treated as the owner
of it for all purposes.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">12. <U>Unclaimed Money</U>. If money for the payment of principal or interest remains unclaimed
for two years, the Trustee and the Paying Agent will pay the money back to the Company. After
that, Holders entitled to money must look to the Company for payment as general creditors unless an
&#147;abandoned property&#148; law designates another person.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">13. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Defeasance and Covenant Defeasance</U>. If the Company at any time deposits with the
Trustee U.S. legal tender and/or U.S. Government Obligations sufficient to pay the principal of and
interest on the Notes to redemption or maturity and complies with the other provisions of the
Indenture relating to defeasance, the Company will be discharged from certain provisions of the
Indenture and the Notes (including certain covenants, but excluding its obligation to pay the
principal of and interest on the Notes).
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">14. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Amendments, Supplements, and Waivers</U>. Subject to certain exceptions, the Indenture or
the Notes may be amended or supplemented with the written consent of the holders of at least a
majority in aggregate principal amount of the Notes then outstanding, and any existing Default or
Event of Default or noncompliance with any provision may be waived with the written consent of the
holders of a majority in aggregate principal amount of the Notes then outstanding. Without notice
to or consent of any Holder, the parties thereto may amend or supplement the Indenture or the Notes
to, among other things, cure any ambiguity, defect or inconsistency, provide for uncertificated
Notes in addition to or in place of certificated Notes or make any other change that does not
adversely affect in any material respect the rights of any Holder of a Note.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">15. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Restrictive Covenants</U>. The Indenture imposes certain limitations on the ability of the
Company and its Restricted Subsidiaries to, among other things, merge or consolidate with any other
person, or sell, assign, transfer, lease, convey or otherwise dispose of all or substantially all
of the Company&#146;s or any Guarantor&#146;s assets. Such limitations are subject to a number of important
qualifications and exceptions.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">16. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Successor Entity</U>. When a successor entity assumes, in accordance with the Indenture,
all the obligations of its predecessor under the Notes and the Indenture, and immediately before
and thereafter no Default exists and certain other conditions are satisfied, the predecessor entity
will be released from those obligations.
</DIV>


<P align="center" style="font-size: 10pt">13
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">17. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Defaults and Remedies</U>. Events of Default are set forth in the Indenture. If an Event
of Default shall have occurred and be continuing, then the Trustee or the holders of not less than
25% in aggregate principal amount of the Notes then outstanding, may declare to be immediately due
and payable the entire principal amount of all the Notes then outstanding plus accrued interest to
the date of acceleration; <I>provided</I>, <I>however</I>, that after such acceleration but before a judgment or
decree based on such acceleration is obtained by the Trustee, the holders of a majority in
aggregate principal amount of the outstanding Notes may rescind and annul such acceleration and its
consequences if all existing Events of Default, other than the nonpayment of principal, premium, if
any, or interest that has become due solely because of the acceleration, have been cured or waived.
No such rescission shall affect any subsequent Default or impair any right consequent thereto.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">18. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Trustee Dealings with Company</U>. The Trustee under the Indenture, in its individual or
any other capacity, may make loans to, accept deposits from, and perform services for the Company,
and may otherwise deal with the Company, its Subsidiaries or their respective Affiliates as if it
were not the Trustee.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">19. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>No Recourse Against Others</U>. As more fully described in the Indenture, no director,
officer, employee, stockholder or incorporator, as such, of the Company shall have any liability
for any obligation of the Company under the Notes or the Indenture or for any claim based on, in
respect of or by reason of such obligations or their creation. Each Noteholder by accepting a Note
waives and releases all such liability. Such waiver and release are part of the consideration for
the issuance of the Notes.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">20. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Authentication</U>. This Note shall not be valid until the Trustee or Authenticating Agent
manually signs the certificate of authentication on this Note.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">21. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Governing Law</U>. <B>THIS NOTE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK, AS APPLIED TO CONTRACTS MADE AND PERFORMED WITHIN THE STATE OF NEW
YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW. EACH OF THE PARTIES TO THE INDENTURE HAS
AGREED TO SUBMIT TO THE JURISDICTION OF THE COURTS OF THE STATE OF NEW YORK IN ANY ACTION OR
PROCEEDING ARISING OUT OF OR RELATING TO THIS NOTE.</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">22. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Abbreviations and Defined Terms</U>. Customary abbreviations may be used in the name of a
Holder of a Note or an assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the
entireties), JT TEN (= joint tenants with right of survivorship and not as tenants in common), CUST
(= Custodian), and U/G/M/A (= Uniform Gifts to Minors Act).
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">22. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>CUSIP Numbers</U>. Pursuant to a recommendation promulgated by the Committee on Uniform
Security Identification Procedures, the Company has caused CUSIP numbers to be printed on the Notes
as a convenience to the Holders. No representation is made as to the accuracy of such numbers as
printed on the Notes and reliance may be placed only on the other identification numbers printed
hereon.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">23. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Indenture</U>. Each Holder, by accepting a Note, agrees to be bound by all of the terms
and provisions of the Indenture, as the same may be amended from time to time. The Company will
furnish to any Holder of a Note upon written request and without charge a copy of the Indenture,
which has the text of this Note in larger type. Requests may be made to: Aavid Thermal
Technologies, Inc., 275 Technology Drive, Southpointe, Cannonsburg, PA 15317, Attention: Sheila S.
DiNardo, Esq.
</DIV>


<P align="center" style="font-size: 10pt">14
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV align="center" style="font-size: 10pt; margin-top: 18pt">ASSIGNMENT FORM
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">If you the Holder want to assign this Note, fill in the form below and have your signature
guaranteed:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">I or we assign and transfer this Note to:
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 100%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 100%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="100%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="100%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">

<TD nowrap align="center" style="border-bottom: 1px solid #000000">&nbsp;</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top">(Print or type name, address and zip code and<BR>
social security or tax ID number of assignee)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">and
irrevocably appoint
_______________________________________________________________,
agent to transfer this Note on the books of the Company. The agent may substitute another to act
for him.
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="40%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="58%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Date:
_____________________________________
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Signed:
______________________________________________________<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(Sign exactly as your name appears on the other
side of this Note)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Medallion
Guarantee: &nbsp;____________________________________
</DIV>

<P align="center" style="font-size: 10pt">15
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center" style="font-size: 10pt; margin-top: 18pt">&#091;OPTION OF HOLDER TO ELECT PURCHASE&#093;
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">If you want to elect to have this Note purchased by the Company pursuant to Section&nbsp;4.13 or Section
4.17 of the Indenture, check the appropriate box:
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">Section&nbsp;4.13 <FONT style="font-family: Wingdings">&#032;</FONT><FONT style="font-family: Wingdings">&#111;</FONT><BR>
Section&nbsp;4.17 <FONT style="font-family: Wingdings">&#032;</FONT><FONT style="font-family: Wingdings">&#111;</FONT>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">If you want to elect to have only part of this Note purchased by the Company pursuant to Section
4.13 or Section&nbsp;4.17 of the Indenture, state the amount you elect to have purchased:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt">$ __________________
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="48%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="50%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Date:
_______________________________________
</DIV></TD>
    <TD>&nbsp;</TD>

<TD align="left" valign="top">_________________________________________________________<BR>

NOTICE: The signature on this assignment must
correspond with the name as it appears upon the face
of the within Note in every particular without
alteration or enlargement or any change whatsoever
and be guaranteed by the endorser&#146;s bank or broker.</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Medallion
Guarantee: _________________________________
</DIV>



<P align="center" style="font-size: 10pt">16
</DIV>


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