Asus Secret jumpers.

I found this today and thought you guys would like to see it. Asus`s new P4B266 motherboard features a special "hidden" feature for overclocking nutswho want to push their new Northwood Pentium 4`s to even higher speeds. The P4B266, which uses Intel`s 845 DDR chipset, features an "over-volt" jumper that , when thrown will let you run the voltage up to 1.75 volts in 0.025 increments. With Willamette CPUs, the switch will let you run the voltage up to 2.1 volts. From what the pic shows the jumpers are by the Socket. If everyone already knew this please delete it.

If "hidden" means in the instruction manual then yes

Yer its a advertised feature
With a beta bios you can feed the northwood 2.1v, altho i wouldnt recommend it.