My R3E has a strange problem.
When I go to shut it down, windows goes through the normal shutdown, then the screen goes blank and all my fans spin up to 100%. It then hangs like that indefinitely. Hitting the Power button and holding it does not force a shutdown. Hitting reset does not reset my machine... The only way to shut it off or restart it is using the switch on my PSU.

After making a BIOS change, I also sometimes experience this problem where I hit F10, it saves, the screen goes blank, and all my fans spin up to 100%. Once again the Power button, and reset buttons do nothing, and my only recourse is to use the switch on my PSU.

The board starts up normally every time after shutting off the power at the switch.

The POST string shown on the RC Poster tool does not change in any case. It's either 'successfull boot' or 'bios setup menu'