Originally posted by: Arkaign
It's supposed to (unofficially).
Read this whole article :
http://www.xbitlabs.com/articl...splay/asus-p4b266.html
Here's what I would do.
(1)- Make a 98se boot floppy at bootdisk.com. Delete everything on it except command.com, io.sys, and msdos.sys.
(2)- Put the Celeron back in the P4B266 system.
(3)- Download the latest bios from asus for that mobo. MAKE SURE the model # is correct, there are several variants of the P4B266 series (-C, etc). The following are links for the bios and flash utility for the basic P4B266 board.
http://dlsvr03.asus.com/pub/ASUS/mb/flash/aflash221.zip (bios flash utility)
http://dlsvr03.asus.com/pub/AS...ck478/p4b266/1010j.zip (bios file)
(4)- Copy the flash utility and bios file to the boot floppy that you made earlier.
(5)- Unplug all usb and non-essential devices from the system.
(6)- Boot from the floppy, flash your bios. Usually like this : A:\flash.exe newbios.rom (example names, it might be aflash.exe 1010j.rom or whatever)
(7)- Use the bios/cmos reset jumper to clear cmos.
(8)- Install your P4 cpu, see how it goes.
Hope that helps