Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
I have almost the exact same setup only I have the KF of the CPU. Otherwise same. This is a fantastic Combo. The MB is stable as they get. Running my 4090 no issues. Ever. Free BUMP>......
Sounds like its your RTX card buzzing. I have a 3090FE and at first I thought it was my PSU buzzing because it was 12yrs old and because of the new card. Got a 1300 watt and same thing. It's just the Card electrical whine when it draws a good amount of power.