I have a P2 400 Gateway. As best I can tell, I have a Tabor motherboard made by Intel. It has a MP440BX chipset. Can I upgrade to P3? Gateway says I'm limited to a P2 450. The details I know are as follows: P2 @ 400MGZ, Slot 1, 100 MGZ FSB, 4X multiplier, 2.0V, 440BX chipset.