A couple of notes about the 0609 BIOS that AndreYang kindly made available.

http://www.xtremesystems.org/forums/...d.php?t=113866

The BIOS shows multipliers up to 12 are available for Kentsfield. But when I tried to use 11 and then 12, it dropped back down to 10. 4:5 performance is better, as Andre indicated. But FSB on Kentsfield is more limited than some of the other BIOS's I've tried.

If you want fully unlocked multipliers for Kentsfield, the best options right now are the Asus P5W DH and the P5WDG2 WS Pro. The P5W64 WS Pro might also be a good choice. The one advantage to using the P5B Dlx is it's the only board I've tried that allows FSB on Kentsfield above 400.