My PC is really, really quiet. I have Noctua case fans and a BQ cooler. When I had either of my 3060 Ti FE cards in, there was no sound above regular ambient. The 3080 is sat there without fans on now and it's the same sound level as when I had the 3060 Ti running.
In the benchmark, there's a whine that corresponds with things moving - high amount of movement in the benchmark and you get a loud whine. Not much going on, whine reduces. Can't hear fans.
I did not notice my 3090 coil whine when I was using my old case which has little airflow, all fans inside the case were running at higher rpm and much louder which likely covered the card coil whine. With the new case I can set all fans running at lower rpm and now hear the whine.
I undervolt the card and turn the case/cpu fans rpm up little bit to make the whine less noticeable, also less heat from the card while playing games.