hmm, well since the BIOS says PII/PIII motherboard I was hoping it would support some kind of PIII, which would mean it has Coppermine core support. And all 128k cache Celerons from 566 up were based on that Coppermine PIII.
I have an MSI board for Gateway that won't support my Celeron 1100 Tualatin on a standard Tualatin adapter, I don't know why, but have seen similar problems on Asus boards caused by BIOS not supporting multipliers higher than 10x. Asus released a beta BIOS last year that fixed the problem.
Oh, and you won't break anything, Intel is smarter about how they reconfigure their sockets than to set you up for that type of failure. It will either work, or not. If you have a close friend that will allow you to test their 100MHz bus socket type PIII on your board, you can find out in a hurry.
<font color=blue>Watts mean squat if you don't have quality!</font color=blue>