I have never really seen blurring related to forced OGSSAA with the "0x000000C0" AA flag. A good example of this is Insurgency, which I made some screenshot comparisons of with my old 2-way GTX 780 setup: http://www.forum-3dcenter.org/vbulletin/showpost.php?p=10625281&postcount=6295 Absolutely no blurring with maximum ingame settings and OGSSAA or OGSSAA+MSAA hybrid modes. And only a very slight and negligible amount of blurring with 8xSGSSAA. Always remember to disable all ingame AA settings (including FXAA), as well as "Motion Blur" and "Film Grain" when using driver forced AA in Source engine games. With DSR, the level of sharpness is controlled by the "Smoothness" slider in NVCP. I recommend around 20% smoothness, for a good compromise between good sampling quality and a sharp image.