I have a 3090 (MSI GAMING X TRIO) that been sitting in storage for a bit and have put it into a new PC.
When under a graphically intensive load, there is a very loud buzzing, almost sizzling sound that comes from the GPU. Starts off low when opening a game, but gets loud when in game.
Does this sound like coil whine or something more sinister? I've attached a sound recording, you will need to turn up volume to hear it.
I think that's okay as long they allow you to remove the safe guards.