Did you try 560 * 420, Raaaid? Might be easier on the eyes...
Presumably you're not running the new Beta patch - that might help a little too.
A clue as to why Raaaid is struggling:
NVidia 8500 GT 43 GFLOPs
NVidia 8800 GT 504 GFLOPs
NVidia 570 GTX 1405.4 GFLOPs
Figures from
http://en.wikipedia.org/wiki/Compari...ocessing_Units. There are other factors affecting performance too, of course...