hx750 buzzing under load?

FAZZG

Honorable
Dec 7, 2013
12
0
10,510
So I've been hearing this odd buzzing noise (sounds electrical) for a bit of time now after doing my pc build, and I'm almost certain it's the psu now. it only seems to happen when the system is under load. is there any way to be sure it's the psu, and if it is, is it something I should replace?

System Specs:
i5 4670k
gigabyte z87 ud3h
EVGA GTX 780 FTW ACX
Corsair hx750
 

FAZZG

Honorable
Dec 7, 2013
12
0
10,510
no, I don't think so.. it only becomes noticeable when I'm playing some games, like crysis on full settings. it does seem to stop after v-sync has been enabled though.
 


now THATS weird...maybe its the GPU fans?