3dfx' entry level VSA-100 board. This is just about 50% of a Voodoo5 5500. It features one VSA-100 chip and 32MB of SDR-SDRAM at 166MHz. Note that the PCI version has quite a different layout comparing with the AGP version while the PCI and AGP version of the V5 5500 are pretty much the same. The Voodoo4 4500 AGP has empty slots for additional RAM and with the RAM installed it would be a Voodoo4 4800. 3dfx was probably thinking about the future and getting their boards already fixed up in case they needed more variety in their product line-up.
The Voodoo4 4800AGP never made it up the market. There is one engineering sample out there with DVI, TV-out and 64MB RAM installed. 3dfx hobbyists also made their own 64MB cards (for as well AGP as PCI!) by adding and/or swapping RAM chips with higher density chips.
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