Problem while running crysis

Hi,..My pc config is
E7400 2.8gh c2d
Palit hd4850
4gigs ram ddr2
P35 gigabyte mobo
600w extreme power cooler master

While running crysis warhead...after 10-15 mins game crashes (not responding)...checked in with the error message...its something like
Problem signature:
Problem Event Name: APPCRASH
Application Name: Crysis.exe
Application Version: 1.1.1.5767
Application Timestamp: 471f94e3
Fault Module Name: atidxx32.dll
Fault Module Version: 7.15.10.163
Fault Module Timestamp: 49344a8f
Exception Code: c0000005
Exception Offset: 0001c7f3
OS Version: 6.0.6000.2.0.0.256.1
Locale ID: 1033
Additional Information 1: dc61
Additional Information 2: 8b6f271aa7656f52eb6059c126362cb4
Additional Information 3: 2405
Additional Information 4: f8915e154a73dca29fb7e71e91b0fd49

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Is there a bug with the game...or is my card faulty or is it the drivers of the card????

ps : i tried GTA san andreas as well...it also freezes sometimes......

Fault Module Name: atidxx32.dll
Fault Module Version: 7.15.10.163
Fault Module Timestamp: 49344a8f

This looks like gpu driver to me...