K1mac
Are you using the new 30 series PX1? I can't slide my fan curve below 30% even with "enable custom curve" checked?
Ensure you're using v1.1.0 then click the arrow here twice:
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then once you're on the screen below ensure the button pointed at is enabled, you may additionally need to disable the auto button and unlink the fans as seen in the first image:
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also wanted to say I have confirmed it is indeed the same fan for me that is happening to everyone else which is nice to know we're all on the same page coil whine jabs aside. I also attempted to apply light pressure to the center of the fan as per recommendation for older cards with fan issues in this forum, but I haven't really noticed a difference in the ringing of the beeeeeeeeeeeeeeeeeeeeeep.