Hello. I have read many threads on here about the the difference but i still dont understand which one i should get. I am going to be gaming and watching movies and have only 1 monitor 1080p and a gtx 780 3gb gpu. Does it really matter as i dont want to add more graphics cards later on and dont plan on overclocking. My build so far is http://pcpartpicker.com/user/apatel18/saved/z2vbt6