Idles at about 53C-55C, runs at around 60 when playing games. I've tried many different drivers, none have seemed to have changed much. Nothing's overclocked.
ASUS M5A97 LE R2.0
AMD FX-4100 Quad-core Proccessor 3.6GHz
EVGA GeForce 9600 GT
Corsair 8 GB XMS3
Windows 7 Professional x64
Happens in the following games
TERA: Happens while starting up, pressing ctrl-alt-delete will eventually unfreeze the game and become playable.
EVE Online: Doesn't really happen much, sometimes the drivers crash.
Tribes Ascend: Happens about 30 seconds to 2 minutes.
Counte-rStrike: Global Offensive: Can happen 30 seconds to 5 minutes in.