4x Quantum3D Obsidian 2 200SBi – an 8x Voodoo GPU bodge and restoration

I think it's PCI so it could fit in pretty much any motherboard from the time.

AGP connectors have a very peculiar pattern[0]. Those cards are more consistent with PCI[1].

[0] https://en.wikipedia.org/wiki/File:AGP-Video-Card.jpg

[1] https://en.wikipedia.org/wiki/File:Adaptec_AHA-2940AU.png

AGP was extremely new when the Voodoo 2 was released, and hence the cards used PCI. According to Wikipedia, the first model to support AGP was the Banshee: https://en.wikipedia.org/wiki/Voodoo2#Models