

                                                               Exhibit 5.1
WILSON SONSINI GOODRICH & ROSATI
PROFESSIONAL CORPORATION
650 PAGE MILL ROAD
 PALO ALTO, CALIFORNIA 94304-1050
TELEPHONE 650-493-9300   FACSIMILE 650-493-6811
WWW.WSGR.COM

May 21, 1999


3Dfx Interactive, Inc.
4435 Fortran Drive
San Jose, California 95134

RE:     Registration Statement on Form S-8

Gentlemen:
We have examined the Registration Statement on Form S-8 to be filed 
by you with the Securities and Exchange Commission on or about May 21, 1999 
(the "Registration Statement") in connection with the registration under 
the Securities Act of 1933, as amended, for an aggregate of 
2,000,000 shares of your Common Stock under the 1995 Employee Stock Plan.  
Such shares of Common Stock are referred to herein as the "Shares", and 
such plan and compensation agreements are referred to herein as the "Plan".  
As your counsel in connection with this transaction, we have examined the 
proceedings taken and are familiar with the proceedings proposed to be 
taken by you in connection with the issuance and sale of the Shares 
pursuant to the Plan.
It is our opinion that, when issued and sold in the manner described 
in the Plan and pursuant to the agreements which accompany each grant under 
the Plan, the Shares will be legally and validly issued, fully-paid and 
non-assessable.
We consent to the use of this opinion as an exhibit to the 
Registration Statement, and further consent to the use of our name wherever 
appearing in the Registration Statement and any amendments thereto.

Very truly yours,

WILSON SONSINI GOODRICH & ROSATI
Professional Corporation
/S/ WILSON SONSINI GOODRICH & ROSATI


