When I first got my PC4000 ram I got poor results at 2.65 volts. It ran though. I upped the voltage and the performance got better. Thats why I suggested it.
These specs are here so I don't have to repeat them. P4 2.4c @ 3.0 ASUS P4P800 dx Geil pc4000 2.5,3,3,6 250FSB 1:1 Radeon 9500 non-pro 2 Maxtor 60gig 7200rpm 8mb cach in raid 0 SB Audigy 2