P6BX7 Chipset...need help!

[Tullphan]

Can't seem to find any info on this motherboard except for a few drivers.
It has both a slot 1 & socket whatever that is presently occupied with a Celery 400.
I'd like to know how big a cpu I can put in it.
Can anyone help?
TIA!

 

[Peter]

Write down the BIOS ID string that appears on the bottom of the screen when it's first starting, and post that here. That'll help identifying the board - so would a photo of it.