This leads to mipmapbanding on texturstages
You may test it at Serious Sam 2 and you may notice that opengl suffer in worse image quality with Nvidia default optimizations. This means all 3 opts after you ONCE set AF quality. Look at the panel.
Look at image quality. Catalyst AI Standard IS ONLY COMPARABLE with NVidia "High Quality". All standard Nvidia quality settings show flickering pixels at high frequency shaders.