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1680x1050 at the moment!
How do you adjust settings above what it lets you set them to in the game?
Depends on what kind of "max" you have in mind. Max in-game settings and 4xAA or AA application controlled and 8xAF then yes.
If you crank up 16xAA/16xAF even an o/ced 8800GTX will struggle in certain maps with a lot of grass or intense actions.
In your GFX cards control panel, right click on the desktop.