Check out this new application from Nvidia. It choses best settings for your games based on your specific hardware. On the website it says it is limited to 10k downloads so get it and give it a try. I used for WoW so far and it helped a lot. There are some bugs like not recognizing my 2560x1440 monitor. It is still in beta.
YouTube:
http://www.youtube.com/watch?feature=player_embedded&v=FjH7HZICTvY#!
Nvidia article:
http://www.geforce.com/whats-new/articles/geforce-experience-closed-beta-released