ok ive got a Voodoo 3 2000 16mb card at the moment and i gotta say people make it sound worse than it is, with medium settings and i get around 40 FPS, the lowest FPs i have ever got was 15 and this was on southern france when i was hiding in some bushes, now i dont have the best system ever, i have:
1GHz CPU, 128mb RAM, 16mb voodoo card.
now if this is what MoH runs like on the voodoo 3 card which is only 16mb im guessing it would be alot faster with a voodoo 5 card which is 64mb, voodoo cards are cheap as hell since they have gone out of business so i would recommend voodoo cards, very reliable and very fast to say the least, and if you want drivers for the card theres a site which is dedicated to making drivers for the card.
http://www.voodoofiles.com i love my voodoo card and im gonna cherish it forever lol