I have a very loud noise from flipsky 63100s resonating right around 5k rpm, no higher no lower and then just general noise too past 10 or 11k rpm.
It’s quite a unique flipsky thing, lower rpm fs6374s also have it very loudly and Maytech 6396 were quiet even up to 14k rpm. You can hear what it’s like accelerating and decelerating from that speed here 🖼 Pictures and Nothing Else! - #18895 by CarelessAquarist