Quote Originally Posted by jasonelmore View Post
Look at your auto settings in the bios for NB and SB. It will show the actual values your motherboard is using for auto. Try bumping it down .10 v on both and see if it's still stable.

Your case's ambient temps are probably the cause. Make sure you have a intake fan in the front and a exhaust fan sucking the air out the back. Also adding a small fan to the NB never hurt anybody.
How do I adjust the voltage? What am I looking for to adjust the NB and SB voltage?