Beep/Whine noise from PC

[TechArrow]

The noise is driving me crazy! I started noticing it around a few weeks ago. It varies noise level and length everytime.

I don't even see a pattern in it's sound-making. It does it occasionally while playing games - or at least not loud enough to break my concentration. It was doing it every few seconds when I was watching anime, but barely with YouTube videos. It's not doing it now as I type this. The only consistent thing about the noise is it starts after my computer has been on for a couple hours.

I stressed tested everything. But I can't seem to narrow down to what's producing the noise.
First I thought it was GPU coil whine so I stressed tested that with PrecisionX. Nothing.
Then I tested SSD and HDD with Crystal Disk Mark. Nothing.
Also used prime95 if that makes a difference

GAHHH! IT HAPPENED ONCE JUST NOW AS I SWITCHED TABS


SPECS:
GTX 780 SC -refurbished
i5 4690K (oc'd with MSI OC Genie)
EVGA 700 B2
Kingston V300 120gb SSD
Seagate 1TB HDD


Update #1 : The noises seems to have stopped or died down after posting this... I swear my computer is plotting against me.

 

[DustinV]

How to locate sound:

Roll up a piece of paper or get an empty paper towel roll
Open up your pc and point it at each component while stress testing until you figure out where its coming from

Most likely coming from power supply or gpu