assuming you will have fans in your possession to populate the front panel as intake then mount the rad to the top and install the fans to it to push air out. at this point you can go ahead and get the x72 if that's what you want. I personally have an x62 on my 6700k that is overclocked to 4.7Ghz with 1.4v and the temps are great. But if you want something that can fill the entire space of the top grate and maybe have RGB fans on it to make it look nice then you can do that as well.