GPU 99% usage and 75c temp on idle

Muramasa

Reputable
Aug 16, 2014
7
0
4,510
Well today I was trying to overclock my processor and coulnt get it to work right so I just set back to normal settings after like 10 or so tries and now my cpu is 10c higher and my GPU is going crazy at 69-75c on idle 99% usage.
my specs
GPU: gtx 770 evga sc
CPU: amd fx8320
MOBO: gigabyte fxa990 ud3 rev 4
PSU: corsair cx 750m
RAM: corsair vengeance 8gb I think the ram is 1600mhz not sure
 

Muramasa

Reputable
Aug 16, 2014
7
0
4,510

can you possibly explain why I need to let it cool down? Im just interested in knowing so maybe I can fix it next time.