It says that the card is compatible with PC and Mac (Possibly dual BIOS). Does anyone know if 3dfx really shipped a card like that? Or is the description wrong?
In fact, they also made a quad processor version (Voodoo 5 6000 if I recall correctly,) they are ridiculously rare as they were never released (as in, the cheapest I saw one for was over $1,000 US on eBay.)
A Radeon $40 8500 will still mop the floor with it. Yeah, that's the expression I picked. So what?!
Yes, if a manufacturer so decided, they could make a single card that worked in both a Mac and a PC. 3dfx did make some Voodoo cards that way.
But, you'd be better off finding a PCI Radeon. Much better. (Unless you specifically want to play an old game that has 3dfx acceleration, but not OpenGL.)