I7 930 4.0ghz freezing only in counterstrike

im really getting annoyed. Quick system and overclock info

i7 930 @ 4.0ghz
evga x58 sli li mobo
evga gtx 280
gamexstream 750w
antec 900
h50 corsair
6gb corsair xms 1600mhz

vcore 1.325
gpi auto (1.1)
cpu pll auto (1.8)
dimm 1.66

speedstep,spectrum,turbo off
HT on

temps = 35-40c idle 65-70 load
gpu - 42c-50c

linx passed 20 times on max memory took 1:30 hours
prime95 passed 24-30 hours
intelburntest passed all 5 times no errors

wtheck is going on? its stable but when i launch counterstrike 1.6 which shouldnt even take any thing to load or play 2-3 mins into the game the whole system freezes.

i've tried going stock settings in bios still freezes, i've tried taking out every single part and putting them back in with new thermal paste, etc. I've tried reinstalling steam and counterstrike also reinstalling my display driver (it worked for a while then it started freezing again) i've updated my bios and yea... what am i doing wrong here? i've passed every test i've tried changing qpi and cpu pll still nothing. do i have a defective product? cpu, mobo, or gpu?