Hmmm...

I think my fps seems a bit low for what Im using but anyway here are my results

using vista 32 bit and dx10 mode

All settings medium 1280 x 1024
Avg fps 59.44

All settings medium apart from textures, object detail and water quality high
Avg fps 41.56

All settings very high
Avg fps 11.09

All setting very high +2Xaa
Avg fps 8.61