Am guessing this sofware related. What software do you use to controll the fans. Far as i know AIDA doesnt controll your fans.
HWMonitor could be this is not optimized for the new hardware you using. Check if they have a new version.
Did you overclock your system ? Is the Asus suite software up and running ? It should a have a monitor function as wel. But I dont have a ADM cpu or so here stops my common knowledge of these things.
Sorry..... Maybe set your question at the motherboard topic of Asus.