This mobo uses the Via KT266A chipset. I believe the max multiplier for that board is 12.5. And it being a KT266A chipset, the highest FBS that you can attain is probably 166 (I don't know this for sure, it's been a while since I touch one of those chipset). OK, so now we have 12.5x166=2075. That's probably what you're gonna get. Just double check what your max multiplier is and what your max FSB is on that board and do that math, that's going to your limit. I'm almost certain the mobile 2500 will work on that board, there's no special requirement for the mobile 2500, it's just another Athlon XP chip,that happens to be unlocked and default at lower voltage. Even if your board doesn't support 1.45 volt, the chip will work with whatever that board's lowest volt is.