Got a BFG 275 GTX OCX, end of last week, and today was the first time i have tried a game on it, left 4 dead. The game seems to play fine for a few minutes but then the sound stutters and the game freezes for a few seconds then will be fine then will do it again a few seconds later and the goes to the desktop, my system does NOT hang i can still got to Task Manager and see that Left 4 Dead 'Isnt Responding'. Is this a gfx card problem or windows 7, have tried a different set of drives but still get the same problem. Havent tried any other games