At this point i refuse to believe people who say they dont have coil whine. My 3090 was an Inno3D 4Xichill. It was loud and hot (fans) so i wanted a silent card this time around, read some reviews, Asus TUF 4090 performed well. Got that one and noticed the coil whine. I swapped in my 3090 and had no coil whine, i tried 4 different Corsair PSU's 3X1000Watt and one 750watt and have the same coil whine on my 4090. Its not the worst but its noticable, but also the card... well.. it is incredible cool and silent, while my 3090 Inno ran at 80 degrees celcius constantly with fans sounding they're about to take off, so i dont know if the coil whine dissapeared over time. I almost returned my 4090 but then i inserted a Gigabyte 3070 i had lying around. (Okay yes, i was a miner, sue me) and then noticed a coil whine, less severe, but constant and even in destkop, something i never noticed before and now im wondering if i never noticed the coil whine. So im not returning my 4090 Asus TUF because honestly its not that bad and i feel i would get worse cards.
Im just hoping it breaks in at some point, also its very weird, yesterday i was not able to hear coilk whine at all, now i just bought Modern Warfare 2 and its very audible. I hate that its not an exact science.