Your GTLs are a bit high, you may want to give the optimized CME a shot, I would give vNB a slight bump, you may have to play with your VTT, and I would start with a PL (performance level) 8. My rig is rock stable now sitting at pl8 but if I switch that to pl10 and don't touch anything else my board won't even post. Four occupied dimms can be rough on this board.