Seasonic G450 coil whine

[DJ46]

I recently bought this PSU and it has coil whine.

I don't want to RMA it, as the e-shop is known for waiting quite a bit and probably won't even accept it as a flaw. Also, it isn't consistent at all.

 

The PSU whines (and sometimes also doesn't):

- when the PC is off and I'm just charging my phone through USB

- when I'm just watching youtube

- in games

 

Edit: I posted this at night and forgot to add that I heard about covering the coils with multiple types of material (nail polish, hot glue, silicone...) And I wanted to try it. I'm studying at a school where I work with electricity, so I can get help from teachers and there's a lot of tools.

 

And, after playing some more games, it seems to get worse when under higher load. But it still sometimes whines when the PC is off.

[Faa]

There's no fix other than RMA'ing.