Besides all of that, typically the certified drivers are not the best drivers for performance. My Matrox G400 has the latest driver build--(6.51) which I learned of on this webiste--while the MS Windows update wants me to download 5.20 just because it is certified. That is the version I got on the driver CD that came with my card, and that driver wouldn't work unless my computer was in safe mode
Don't fret over the certification thing, though. 3dfx is (or was) very good about compatibility with Windows.