I have an i5 3570 3.4 gHz. Looking back I should have probably gotten something better, but I have been using this for a while now and it has been great. I currently have a GTX 650, which I would like to upgrade from to a 780. My plan is to start out with a single 780, then when something is released that the 780 can't run at ultra settings, I would get a second 780. Hopefully that won't be for a while. I am using a 1920p monitor, and the most strenuous use for my computer is Metro Last Light, and I want to be able to run that with 2x SSAA, the reason for my wanting a 780. Thanks a lot for the answers.