my memory settings are little fussy since i am using DDR-6400...i tried DDR-8000 and it was about the same...with the 6400 memory, one memory timing change can stop it from posting...then, there is a little bit of a hassle to reset the bios with a previous saved bios...they have a numerical value that you can set for how many times it should try to overclock at the newer settings...might as well set it to 1 or 0 since 3 times (default setting) doesn't get you any where but lost time.