Sajin
Could be coil whine from the psu which isn’t anything to worry about. Those 12v readings are ok too, but the 12v should be a solid number, and shouldn’t be swinging that much.

thelegendtubaguy
When I run the occt power supply test my system immediately turns off.  I guess I'll RMA again and try a fourth unit... eesh.

I have a 3080ti and a 5950x.  Occt reports about 520 watts of power, WELL within the operating budget of this power supply.

thelegendtubaguy
They're having me do another RMA and suggested swapping out all the power cables in the system when I get the new in box unit.

Frammish
I contacted customer support about my 1300 Platinum buzzing/whining and was asked to supply a video where they could hear it. Unfortunately you can’t hear it easily in the recording thanks to the fan noise when the case is open and it just doesn’t seem to get picked up well by my phone’s microphone when the case is closed. It seems to be a mix of high frequencies switching at lower frequencies. Hard to describe but you sure know it when you hear it. Haven’t bothered to upload it since it’s not the kind of evidence that would get me resolution. 
 
I’ve tried ear cushion adapters to try to keep the noise out while I’m in VR but they only block some of the noise. I’m really getting sick of the noise from this supply but after seeing others report their RMA replacements do the same thing, I think I’m just going to ****can this supply and buy a different model. As of today I’m two weeks out of 90 day step up but there is no step up is available for power supplies anyway. It’s unfortunate. I paid extra to try to get a solid and quiet power supply only to land square in a buzzing mess. 
 
It’s load related. It’s totally quiet when just doing things in Windows but fire up FS2020 and it starts whining/buzzing/high frequency clicking. My dog also hates the sound and won’t stay in the room when it is doing it. I’ve long seen other people complain about buzzing/whining power supplies and video cards but didn’t fully appreciate how annoying it is until I experienced it myself. It is definitely annoying.
 
You would think designers would make sure to keep switching frequencies out of audible range but apparently not. My 1300 is running an 11900 and 3090 FTW3 Ultra, 32GB of 4GHz RAM. I wanted the extra headroom for smoother power to MB/video/RAM while building a new system. Very disappointed with the 1300 P+.

thelegendtubaguy
Figured I'd post here, been documenting my saga with this model here: (Too new to link, thread was called "New coil whine on old 3090 Kingpin on new PSU")

I'm on my third unit and still have this noise.  Third unit took some time to start making the noise, but it's there.  My system just completely turned off while I was in the middle of a game.  My 850 GA can power the system fine (trying to add more headroom with the 1300 watts).