So I bought a sapphire 7970 during cyber monday and was pretty excited to use it. I just put it together last night, format my comp and everything, and everything runs smoothly...that is until i started playing games. Everytime i run a game it would crash and restart my comp. no blue screen or anything, just restarts every time i play a game, it's like it doesn't have power and just shuts down. any help would be much appreciated thank you! I7 860 on a ECS P55H-A 16GB Mem Thermaltake 850W Sapphire 7970 edit: could it be that my motherboard is too old and not compatible?