See if theres a BIOS update, since you can't unlock a celeron your best hope is that it'll see the 12x multiplier, since it does have a 11.5x for the 1.53 PIII i'd guess it does, so it'll likely run the 1200 celeron without problem. Btw since the Celeron 1.2 is likely a Tualatin, is the board fcpga2 compliant?