yeah, just leave the multi at 8 and adjust the fsb to 400 (or 1600, however that bios does it). the 6750 can probably do it at stock voltage. if not, bump the voltage to around 1.35 and try again. if it fails, try bumping the northbridge voltage a notch. That should get you there. that proc oc's pretty easily to 3.2 or even 3.6 and beyond.