I currently have a xeon 1245-v3 3.4 ghz quad core with hyper threading. i was gonna put it in my cool basement and sli two 980 gtx ti cards for gaming on my 4k tv. should i keep the current cpu or should i buy a 4690k and overclock it to 4.4 ghz for better gaming? or would it not matter that much. money is a little issue. i could use the $500 on other stuff but I want to game.