Last month I built a new system that works fantastic until I try to play some games. The computer will reboot itself with no errors. Some games I can manage to play for a few minutes, others in seconds, some at specific points in the game, others quite randomly. So far, I've tried rolling up and back all my drivers, reseating all the cables, cards, and memory, and reinstalling Windows to try to fix the issues....the reinstall actually seemed to make the problem worse. I don't overclock and I don't believe temp is an issue except for possibly the video card. From a cold boot, there are some games I can run that will reboot the system in seconds....not sure if they could heat up the card that fast. I also replaced the memory as I was previously using incompatible DDR3 memory on this unit. It had the same problems with them and I was hoping the new memory would fix everything. Here's my setup: MSI X58 Platinum SLI (bios updated) Intel i7 920 CPU EVGA GTX 280 Crucial DDR3 6GB PC3-10600 1333MHz SB Audigy RaidMax 730W TX-730SS CPU temp: 31C IOH temp: 56C SYS temp 44C GPU temp 68 - 85C (gets hot...not sure how to fix this. Even opened the case and had a fan blowing on it to test.) I appreciate the assist.