Welcome to the forum!
I had an Asus P2L97, it was an LX board and a good one too IMHO. It had a jumper to set FSB from 66, 75, or 83. Since my chip was unlocked (P2 333) I could do quite a bit with it, it had a multiplier control in BIOS but no voltage adjustments.
What kind of board is it? The manufacturer will probably have specs on their website for this sort of thing.