Coil Whine problem with Gigabyte Z370 Gaming 5

[Fraser Cow]

Hi,

 

I've been trying to troubleshoot the coil whine that's coming from my PC and I've hit a brick wall. I can hear the coil whine though my speakers and directly from my PC when my speakers are powered off.  The biggest issue is that it also leaks into USB devices like my microphone and headphone amps, I bought a Behringer UM2 and my friends were complaining that there was a lot of static and electrical noise when I talked, so I tried plugging into the USB hub in my monitor and that fixed the problem in my mic.

 

Something strange I've noticed is that there is no noise in the UEFI menu.

 

Thing's I've tried

I tried 3 different power supplies

Removing GPU

Setting clock speeds to default

Disabling audio controller in UEFI

Disabling WiFi and Bluetooth in windows

Updating UEFI to F15a

Plugging PC directly into the wall instead of UPS

 

 

Specs

i7 8700k

Gigabyte Z370 Gaming 5

EVGA 1000W 80+ Platinum (also tried Old Cooler Mater 850W and a 600W Corsair)

32GB Gskill 3200Mhz

Asus GTX 1080ti

Noctua Redux fans

Samsung M.2 NVME 500GB

Samsung Sata 500GB

Crucial Sata 2TB

 

 

Any help would be greatly appreciated

 

Thanks 

 

 

 

Fraser