GPU usage spikes

EW4981

Honorable
May 21, 2013
2
0
10,510
I have a Nvidia EVGA GTX660 ti
MSI Afterburner shows that my GPU usage will spike a lot, and whenever i try to play a game the spikes will reach 100% and the screen will briefly enter power saver mode, and go black. After a few seconds the screen will turn back on, and everything will be fine, until it happens again. It occurs at random intervals, and sometimes it will crash the game/computer but this happens rarely.
Why is this happening, and is there a way to stop it?
Any help would be great!