If your USB issues are anything like mine on the RVE, I gave up trying to fix it and bought a powered USB3.0 hub for steering wheel, pedals etc.
BIOS 2101 was released on the same day as BIOS 4101 for the RVE. I know the 4101 has the patch that enabled the overclock on the RVE that enabled our overclocks again. I raised a support ticket with ASUS. After a lengthy e-mail exchange I eventually got 4101 and the page was updated. I'd like to think they updated and release both BIOS at the same time? If it's not working for you, try raising a support ticket? Painful, but you will get there eventually.
What are you using to measure and test? AIDA stress uses AVX. Only thing I can think of is AVX offset?
I vaguely recall that Intel XTU and/or Asus AI suite enabled overclocking too?
If you feel up to it, screen grab your BIOS (F12 to USB) and post a zip / google photos album. Happy to have a look.
BSOD's when attaching USB's ...
1. How sure are you that your x42 overclock is stable?
2. If you've been trying different drivers etc. to get usb and/or overclocking working, perhaps it is time to wipe W10 and start again? USB stick and windows update only?
I know it's a PITA, but ... it will help eliminate everything that's been on before and aid USB diagnosis ....
Old, but this is still a great platform IMO.
I think we can rule out the windows build and overclock then! You clearly know what you're doing and where I'm coming from with the fresh start stuff.
Lets see what this hub does and take it from there.