I built many many rigs for many people. So I can tell from first hand experience. Please consider other options than the Voodoo 3 card. Voodoo 3 cards run very hot, draw a lot of power and offer only 16-Bit color depth in 3D mode and also have their image quality weakness in comparison to the TNT2 cards for example. Don't get me wrong, it's not a bad card, but I think there are better alternatives. Ask yourself which games in particular you have that are GLIDE ONLY - because this is the one and only reason to go with a Voodoo 3 card, apart from the nostalgic - hipster - "must have, because others say its cool" - factor!
Regarding the Rage Fury Maxx - it is a rare card and believe me - a K6-2/3 is not even close to fuel this card. This really fast card with its strong 32-bit performance profits massively from higher CPU clock speeds. If you want to max out the Fury Maxx, use nothing less than 1000MHz of CPU power.
Apart from benchmarks, Quake3 engine based games profit from a hardware T&L implementation. It is worth to go with a Geforce / Radeon? Maybe yes! Otherwise I would recommend a good TNT2 card. It offers the best overall performance, featureset and also price. And if you want a glide capable card for Glide only games - add a single Voodoo2 as backup.
Just my few cents, gents!
www.AmoRetro.de Visit my huge hardware gallery with many historic items from 16MHz 286 to 1000MHz Slot A. Includes more than 80 soundcards and a growing Wavetable Recording section with more than 300 recordings.