how much is it affects on the speed if the setting is on high quality in nvidia display drivers and does user really see the difrence if option is in high performance?im now having image setting in performance,but i was wondering what is the perfect balance between performance & quality settings:image setting,antialising setting and anisotropic filtering AND GRAPHICS SPEED.what is nessesary and what is not?like you cannot see the difrence between antialising option 8xs and 4x or if anisortropic option is in 2x and not in 8x.