Hi, I've been looking around everywhere all evening and i can't seem to fix my problem. My current graphic card is an ATI HD 3850 Sapphire and in certain games i can play for a couple of minutes then the whole screen goes black and seems to go on stand-by. I cannot access my computer anymore and i am forced to shut off my computer with the power button. This only happens in certain games. Red Faction : Guerilla and Borderlands both get the issue. I can play MW2 with no problem however. I would love any input as i just bought borderlands and i can't play for more than five minutes.. Thank you