My friend is running his 001 on a G4/350/AGP
with TWO video cards. I helped him set it up
and it's been working without any problems.
The second video card we used is a VOODOO 2000 16 meg pci card that we had to flash so that it would work on a Mac. All the drivers
and flash utility are available at the 3Dfx site.
http://www.3dfxgamers.com/view.asp?IOID=37