Just turn on antialiasing and anisotropic filtering - this will increase image quality.
But if you have done that and still have poor IQ then change driver to something better than 163.xx version (they suck on older cards - maybe they are good for 8 series?). And dont turn on any optimisations - you have powerfull sli rig - you dont need that.
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- improved with GWX and...too many to list them here 
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