I play Team fortress 2 for about less than 3 minutes then I get either a freeze screen or a black screen. I usually have to reboot my PC manually. I have no idea what the problem could be. All drivers are up to date. DX is up to date. I need some help here. I have no problems with games that are not as graphically straining (i.e. Diablo 2, Counter Strike 1.6, and Warcraft 3). I'd like some help here.