Just built a new system. 2 gigs of ram, evga 7800 gt, Amd 3000, Epox mobo, its nice. Anyway, I have one issue. When I play games on it (Quake 4, X-men Legends 2 and Fear,so far), all of a sudden as I am playing, the game will freeze up. I can still hear the audio, but cant move or anything...