I was never impressed with the 6500 series of machines. They just seem gimped.

That being said here are some upgrades that will help.

1. RAM - Max is 128MB. Uses 72pin SIMMS

2. G3 / G4 Upgrade _ Can be pricey

3. Video - Any Rage128 PCI or Radeon PCI will be a dramatic improvement

4. ATA/100 card. Coupled with a new-ish HD this will speed the system up. Lots. Wiring the 8--pin cable can be difficult considering t he complete ass backwards design of the 6500 case.

Good luck.