my board is very unstable also.
i do not like it
its a Rev A3 P45 (per cpu-z)

I had this board. At 375mhz FSB, the system was completely unstable, random BSODs, or hard locks, or it just would restart when it tried to load windows.
stop running 4 sticks of ram for starters.
next stop going up in so little fsb steps.
just slam the fSB to 400 then 450, them after that with a quad its really hard, you need to do alot of tweaking.
set vcore accordingly. maybe +.250mv (just to try it, then lower or raise it if you need to)
Just to start with try these settings.
set Nb to 1.45 and CPU VTT to 1.33v (those are bios settings. the actual reading will be a little lower but thats ok)
All 3 GTL voltage settings just leave at .67x (just to get your system running.)

set ram divider to 333/667 or 333/800
you can use 400/800 also as its a really loose setting and lets quads clock higher.


also the bios is supposed to let you use the Home button on your keybaord as a last known good boot setting incase the system doesnt want to boot, and
Insert as a Clear CMOS,
has anyone gotten those to work, i have never been able to make those work for me...