Grnfinger can u post your settings for your Q9550? I am I just got a maximus II upgraded from Maximus X38. My Q9450 ran fine on my X38 board @3600mhz but I know it can do 4000mhz if u put 1.35v into it, problem was at those speeds I couldent run the ram in the speed I wanted on the X38 so I gave that up. But I am a total noob on this board and I dont know what settings I should have for my Q9450 anyone have adivices?