while playing Diablo 3. I have a amd 6770 with a 600 w psu. Any thoughts and thank you in advance for all your help. The card is at factory settings as overdrive/overclock is disabled. Temps are fine.
That's great! It means your card is performing to its fullest potential. Why does that matter? (BTW you can turn on vsync to limit the framerate to 60 and lower gpu activity)
That's what happens when your GPU is your bottleneck, which is normal in gaming. It goes as fast as it can, 99%, and renders as many frames per second as it can.