The fact that the top speed for this board is 600MHz leads me to think
that it will only work with the "Katmai" flavour of P-III not with its
successor the "coppermine". The Coppermine was the one where they
halved the amount of L2 cache on the basis that they made it full
speed at the same time. These chips require a lower core voltage than
the Katmai ones and some motherboards don't have voltage regulators
that are capable of supplying the correct one. So, if it says top
speed is 600MHz they probably mean that you're limited to the older,
512KB cache, P-III's.

It still might pay to check if it will support them or not - there are a
number of boards which were originally designed for P2's which also had
the flexibility to support the P3 Coppermines - my home machine, with a
650 MHz P3, is running on such a motherboard.

steve