first way is worked for me, this solution really increases performance of the card. For example, I am a fun of Warcraft 3 and I tested dota map on single player mod, low settings, resolution 1024*600 gives me 18-21 fps at war area. same spefications at medium setting i get 15 fps. 18-21 fps. The game is really playable not smooth but not makes crazy when playing
Thank varia for the advice.
Some users have found improved performance by using the "greedy" migration heuristic. This can be done by running "sudo gedit /etc/X11/xorg.conf", and adding Option "MigrationHeuristic" "greedy" to the Device section of your xorg.conf. My xorg.conf file.