Wow, I was not expecting that noise from the PSU. Wonder what that really is. I thought it was going to be a coil whine thing. When I built my PC, the RTX 3080 would audibly sing under load, varying the “song” as rendered image changed. It was quite annoying. Luckily it was an easy fix and the culprit was the PSU (coolermaster, I think?)! No issues with the better brand of PSU (corsair).