I already posted on my Cyrix MediaGX build here:

Cyrix MediaGX build

I thought it would be interesting to add an 8MB Voodoo 2 card for 3D gaming to see how well it would perform. Here are a few quick and dirty results at 640x480 16-bit color:

PCPlayer - 39.4 FPS
GLQuake - 34.7 FPS
Quake 2 - 29.4 FPS
Quake 3 - 20.1 FPS

I actually did not think it would score as well as it did. Those are for the most part more than playable frame rates.