Ive noticed instability after going up to the 8* bios'es aswell. Itll be stable for 24 hours or so, and then all of a sudden become VERY unstable, and go into the typical boot-loops after dying from a BSOD.
My theory is that they have realized that there is a heatissue with the coolingsolution and set the actual voltages of the MCH and FSB way down, requiring you to up them manually alot higher to be stable again. Anyone with a DMM able to test this ?