Well, I 'm a bit suprised there on the choking, I have a GForce2 GTS card, 512MB RAM, Athlon 1.4Ghz, and had the settings at midway., 800x600x16bit, and I'm not having any problems when I get into a plane. I do know the game is a big RAM hog, so you might want to just go ahead and put more RAM in.

Now I've got a GForce4 Ti4600...Cranked the settings up to full, 1024x768x16(Forgot to set it to 32), and it's still pretty smooth. I'll need to get online tomorrow night.

UT2003 demo under Linux runs nice also with the new card