Can I use SpeedFan to check them in-game? I'm not with the PC, but I'll try to do it tomorrow.
I'll give the 280 a shot, and yes, it does happen even if the game is the first thing I do after a boot.
Edit: Should I try the 280 and 275 or the 290 beta first?
Edit: Should I try the 280 and 275 or the 290 beta first?