I have the same card but 1GB RAM and a P4 2.4Ghz. I get about the same frame rate (maybe 50-60) at 16 bit color 1600x1200. This is in photo sceneries. In the 3d scenes I only get about 30 fps.

Turning off smoke and reflections, compressing textures, etc doesn't help. Reducing the resolution helps some.

I'm interested in any ideas too. Probably just a limitation of the card though. Just too many polys and large draw distance?

Clark