I'm getting quite frustrated, as I can't figure this out.
About a month or so, I got a new motherboard, an Asus Rog Strix B550-f Gaming (not wifi), and ever since I've been hearing this super annoying sound, which sounds like coil whine. Gotten worse in the past few days. I'm not really sure what I can do to try and get rid of it. I've tried resetting CMOS, running my usual settings (DOCP to 3000 mhz cl15, PBO on), tried all the power plans, Bios version is the latest one, 1602 5/1/2021. All the armory crate stuff is on default, as are the power settings in the BIOS. I don't know enough about it to know which ones to touch, any help is appreciated. The noise is there when the PC is at idle, even worse when playing games, although it's the idle that bothers me, don't really care if it's there when I'm gaming.
This same exact build, with an Asrock B450 Steel Legend had absolutely no coil whine whatsoever, so I'm fairly certain it's the motherboard. I live in Bosnia and Herzegovina, so returning it will probably be quite a hassle, so I'd like to try what I can first.
Specs:
Asus Rog Strix B550-f Gaming
Ryzen 5 3600
5700xt with an Alphacool Eiswolf 240 GPX pro - using 2 separate pcie power cables (with a Cablemod extension kit)
G.Skill Ripjaws V 2x8gb 3000mhz CL15
Corsair RM750x
Intel 660p 500gb
Samsung 860evo 500gb
WD Blue 1tb
6x Arctic BioniX P120
https://vocaroo.com/1j7CpC0Y2mpb - Taken from outside the case, right next to the rear exhaust fan. Ignore clock in the background.
If you need any other information whatsoever, I'm more than happy to provide. Thanks in advance for any help.
Edit#1 : https://vocaroo.com/1ls34j2VTKj9
New recording with every single fan in the system turned off. I noticed a maybe 5-10% reduction in the noise. Recorded from right next to the 24pin power cable.
Edit#2: It wasn't the motherboard, it was the pump.