PSU Buzzing Noise when CPU under load

Ca11umH

Honorable
Nov 16, 2013
49
0
10,540
When ever my CPU is put under even the slightest load, my power supply makes this really annoying buzzing noise; it sounds like an old hard drive. I've tried stopping the fan with a toothpick to see if the noise stopped but it still happens when the fan isn't spinning.

I've recorded the noise and uploaded it to soundcloud - https://soundcloud.com/callum-howard-10/psu-buzz - it starts at around 00.08 and 00.18.

Cheers,

Callum
 

Ca11umH

Honorable
Nov 16, 2013
49
0
10,540


I don't exactly have £117 lying around; and if i did upgrade, I'd get a corsair RM750.

It's just worring me as I've had the PC for nearly a yerar and the sound's only just started. I'm a PC engineer by trade so I see many PSU's come and go and ive never experienced this.