what rev have the Mainboard?
really a P2B or something like -LS or -B ?
powerleap have two Rev2 adapters the how supports Tualatin (PL-iP3/T) and the other doesn't (PL-iP3)

http://www.powerleap.com/pdf_files/PL-iP3T.pdf

On the Asus P2B mobo, it says:

P2B
Rev. 1.12

On the Powerleap adapter, it says:

PL-iP3/T V. 2.0

Rev. 1.12 the newest and supports 100MHz FSB Slot1 CPUs up to P3-900 woth the newest BIOS
you can try a FSB 133MHz CPU, some of the last boards can run PCI/AGP at 33/66MHz at 133MHz FSB

I tried a slot 1 1000mhz (100FSB) CPU, and it worked OK. 😀
On this 1.12 board, there's a jumper called AGPFS. Its 2 jumper options are:

AGPCLK=CPUCLK = * 2/3 (default)
AGPCLK=CPUCLK

I'm not sure what this AGPFS jumper does, exactly.

Re: 133FSB CPU, I don't have any at the moment. However, I would be interested to try this. Please can you recommend a P3 CPU to get (from ebay)? Thanks a lot.

the jumper should be the AGP/ FSB Ratio
100MHz FSB and default result in 66MHz AGP but ni idea what the other is
i have some Asus P2B-x Mainbaords but non have this jumper

with you slot adapter you can even try to use a P3-S 1400 Tualatin
i have one on a P2B-B running

wikipedia sas there are 533EB, 600EB, 667, 733, 800EB, 866, 933 and 1000B Slot1 CPUs with FSB 133, just but one cheap and try it

exxe wrote:

with you slot adapter you can even try to use a P3-S 1400 Tualatin
i have one on a P2B-B running

Yes, I have tested this mobo with a PL adapter + Celeron 1.4Ghz, and it worked fine. Also, I OC'd the mobo to 112FSB, and it was completely stable.