There was some discussion about people with sensitive ears or sensitivity to transformer whine, were getting some high pitched noise from the newer power supply modules, I can’t remember the part number but it’s probably the current one included. All of mine are older, like prior generation, and they’re quiet.
I’ll look for the thread real quick.
I think there was actually more than one thread, but you can look for the other one if you’re interested. See if yours has the same part number as the one that they’re discussing which was making noise.