I just manually set the voltage to 1.75 volts on the slocket(not really necessary-can be left at default) and to 1.75 volts in the BIOS(along with the other usual settings). Make sure to flash to the latest BIOS first(TH) though(which you may have already done-since it has been a while since Abit has released a new one for the BE6). The BIOS reports the CPU voltage to be 1.74 volts with a generic 250W power supply and is as stable as ever.
BTW, the CPU I used was the 1.1Ghz Celeron with 128kb cache.
hth,
eplebnista