bmg which bios ? try 0304 for fixing the cpuz oddness or you already on 0304 bios ? cpuz 1.40 ?

as to clear cmos, i found i haven't ever needed to use it, failed oc's recover very well - turn off pc, turn off psu power, wait a sec, turn back on pc hit insert or sometimes i just wait a moment and it comes back at default 266FSB to get into bios so i can try different settings.