[PvK]

I happen to have a PCI-bus GeForce 2 (64 MB MX/400 I am pretty sure) video card which I don't have a computer for any more.

I was using it on my Athlon 1.4GHz machine and it actually did just fine, as long as the game didn't try to use excessive amounts of video bandwidth, which seemed to be rare, up through Last November when I upgraded. It was somewhat unpredictable which games did this.

Examples of games that worked flawlessly:
IL-2 Sturmovik
Combat Mission
Rune/Unreal
Return to Castle Wolfenstein
Myth III

Examples of games that were slow or choppy:
Red Faction (low frame rate)
Grand Theft Auto III (actually ran in slow-motion)

PvK