I'm running the almost exact system, only I've got an Athlon 700 and a nicer mainboard.
Abit K7-100.
I run 1024x768 @32 bit color with 2xFSAA and get 30's to 40's pretty much. The only problem I see is tiny blue lines between some of the textures. Not a big problem for me. The only time I see any "jumping" is if I have the clipboard map up, which jumps around and shows blue lines through it. My main view works smoothly though. Oh, and it looks fantastic too. <G>
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Lephturn - Chief Trainer
A member of The Flying Pigs
http://www.flyingpigs.com "My P-47 is a pretty good ship, she took a round coming 'cross the Channel last trip.
Just thinking 'bout my baby and lettin' her rip, always got me through so far."
- Steve Earl