3DMark99 MAX is an updated version of 3DMark99. It runs a number of tests using DirectX 6.1. I use this benchmark and run all the tests on 640x480 at 16-bit colors (800x600 is default) to test older 3D-cards.

Benchmarks run with this application
GFX 3DMark99 MAX 640x480 score
Rage Fury MAXX 64MB AGP(P3 1400)
12156.00
Voodoo5 5500 64MB AGP(P3 1400)
9948.00
Voodoo4 4500 32MB AGP(P3 1400)
9570.00
Voodoo3 3500TV 16MB AGP(P3 1400)
9346.00
Voodoo5 5500 64MB PCI(P3 1400)
8330.00
Velocity 100 8MB AGP(P3 1400)
8100.00
Voodoo4 4500 32MB PCI(P3 1400)
8093.00
Voodoo3 2000 16MB PCI(P3 1400)
7860.00
GA- 630 16MB AGP(P3 1400)
6917.00
Monster Fusion 16MB AGP(P3 1400)
6600.00
Raven 16MB PCI(P3 1400)
5650.00
WGP -FX8 8MB AGP(P3 1400)
5619.00
Rage 128 8MB AGP(P3 1400)
4939.00