I just built a Core 2 Duo (1.86) PC. When I am running a heavy app such as game with 3d graphics, or rendering video, my computer will suddenly reboot. the power doesn't cut, the screen just goes black and reboots. Also, when i don't use it for a period of time, the same thing happens. something i though i would leave download overnight is gone in the AM because the PC apparently robooted itself at some point. I get a RAM error message. I don't think the RAM is incompatible. One, 512mb DDR2 533 in a 965P-A ecs motherboard. Could it be that i should pick up another (or few more) sticks of RAM? Thanks for any replies.