Not quite sure. Do what MrChad said.
After I updated bios I put a XP 3000 in mine. However, it gives me a little trouble booting if I have all 3 memory slots populated. No chance at all of booting if I try aggressive memory timings either. When I had a XP 2000 in it I could run all three slots at cas2 with no trouble. This is not an uncommon problem with that chipset.