My screen goes black after about 8 minutes of game time. I think that it may be a power supply problem and was wondering if there were a free program that could test my computer to see if it is regulating the power correctly or not. I have a 1000w power supply. MOBO is Asus Crosshair V, (4x4gb) Corsair Ram, (2x250gb) V Raptors hard drives, HD7950 Radeon graphics card, Corsair H10? liquid cooler, and AMD 6 core processor. Any other reason anyone can think of?