Just came across this while Googling around... ;)

http://www.area3d.net/overview.php

It's not too current or extensive, but still useful... :)

Yep, pretty usefull. Been using it for several years whenever I need to look up a card config.

Very cool!  Nice find!   8-)

here's a site that I found Googling around too:

http://www.rashly3dfx.com/

There's a lot of pages with specs of gpus, this one being one with the most cards, updated frequently.
Others :

http://www.techpowerup.com/gpudb/
http://www.hardwaresecrets.com/article/131  (AMD)
http://www.hardwaresecrets.com/article/132  (NVIDIA)
http://www.beyond3d.com/resources/

And the list could go on and on...  ;)

About rashly3dfx, it's quite old and not updated, I remember trying to download some 3dfx tribute movies from that site more than a year ago, but the files are missing.

One more thing, one arena3d page i noticed that they list V5 6000 as being clocked at 183 MHz and we all know that it's not  ::)