try 5 5 5 15 for a higher overclock for now at least
or unlink ram
I tried all of the suggestions and nothing's working. I'm starting to see the possibility that this batch doesn't want to go over 3.9GHz on this mobo.
But I don't plan on keeping this mobo anyway. Actually, I'm looking to buy this mobo in a couple of months:
ASUS Rampage Formula.