Almost 7 years ago, on the very late end of the year 2000 came Nvidia's buyout of 3dfx. This buyout was like many others where the important stuff is bought but support, etc. is still left to 3dfx, which no wonder closed doors at about the same time because they had run out of money.
We were quite surprised to learn that drivers for these cards are still being developed, and not just hacked together with stuff released by 3dfx back in 2000, but real new drivers supporting an unified architecture. One driver fits all 'recent' cards: Voodoo3 2000/3000/3500 cards, and all 3dfx VSA-100 products: Voodoo4 4500, Voodoo5 5500 and Voodoo5 6000, for both 32bit and 64bit Windows.