I've had some nostalgic hardware for a while, including two working K6-II systems (both poopy SiS5598 chipset boards, an OEM ASUS SPAX I got from an HP 6330 at college, and I bought an ASUS SP97-V a few months ago to test EDO SIMMs), but this morning I finally put XP on my PIII-S 1.4GHz/Intel D815EFV and popped in my recently acquired 3dfx Voodoo3 3000 AGP 16MB which only works on this board due to 3.3v AGP of of course, and decided to use "AmigaSport" drivers for XP as I'm a 3dfx n00b. Anyway, a 3DMark01 run got me this, and I think the 815 IGP probably scores about 1200 if I recall, will have to bench it sometime. I certainly noticed graphical anomalies that might be characteristic of the Voodoo chipsets compared to native DX chips, the 16bit color rendering limitation being one of them, but also GT1 seemed washed out (the truck was pink instead of red) and the single/multi-texturing tests had an interesting pixel effect where it looked like the image was composed of points surrounded by dark pixels.
I also have a TNT2 M64(32MB?), Rage 128 AIW and Radeon 7500 32MB to test, the first two along with the Voodoo I bought from Guitarassdeamor a few weeks ago, and the 7500 I got from college out of an Optiplex GX260.