The RMi has a fan button on the cable outlet side,.... sounds like the RM doesn't!
You have to edit the USB section in the registry because on some Mb windows does not make the proper entries, one of mine is always corrupted after fresh install. There are several threads here describing what to do.
I have link working on two different Asus boards, both with RMi psi. So it's not the software.
Sounds like you had a faulty H100. Idle for mine is 30ish with 70s high.