My PSU is probably only about a year or so old. Its a Corsair, so I wouldn't expect it to be going bad already...
The card is clear of any dust, and the fan seems to function perfectly.
I'm contacting Galaxy to see if I can do an RMA.
If for some reason I can't, how would I go about downgrading to Directx 10.1, and 29x.x nvidia driver?
have you ran something like gpuz run in the background set it to record max temp and then play a game to see if it gets to the throttle temp which im assuming is somewhere around 100c