I have just put together a new rig, DFI-Lanparty SLI-DR, Evga 6800GT PCI-E, the whole works, yet I continue to have this problem that will not go away not matter what I try, In Direct3d Games, The game will play fine for about 10 minutes, then textures start to flash on and off, computer becomes very choppy and eventually just locks up. I just went to compusa to pick up an ATI x800XL this morning to eliminate video card as the issue, no dice, it still does it, I cannot figure this out, any insight is appreciated. Doesnt matter if the Cpu is at stock or overclocked.