so I've been messing with this board for quite awhile now that I just got watercooling. My previous best results with my Q9550 were only 3.2Ghz stable.
Anyways I have not been able to get this board to go over 470mhz FSB for the life of me. I took apart the mobo cooling, replaced the TIM, did through bolts, and put some nice panaflo's on both the cooling harbor and NB area of the cooler.
But my settings are as follows:
FSB fine tune disabled
DDR enhance mode disabled
VTT auto (Left this at auto b/c it is locked to NB voltage)
MCH GTL .64
CPU clock skew 200ps
MCH clock skew 400ps
clock drive 900mv
Nothing I seem to do changes the FSB wall at 470, even 1mhz fsb over 470 and the whole system locks up. The CPU doesn't seem to like anything beyond 3.7Ghz even with 1.45V. I have even set PLL to 1.6v and NB to +.35 and cant get this thing to hit my 4Ghz goal. Seems I got stuck with a bum C1 q9550. But still in testing I cannot get the board to hit more than 470mhz fsb with DDR @ 1:1 and the multi set to 6x.