Big Term, this isnt my first build. So everything is slotted right. Ive done benchtests, so on and so forth reseated everything. My only thought is the ram sets I have ( newer rippjaw g skill series isnt compatable w the board. So I am gonna buy some on their tested list, and try that. My post is driving me crazy. As ive literally done everything 15 times plus. Like I said switched the cards. And, most of all the dimm slots im using are correct the black ones dimm slot 1, and 3- 2nd and forth slot from cpu. Like I said ive built a few systems over the last few years and this is baffeling me. But, just as well Im no pc tech either.