I am using 2x4gb of KHX ram with an XMP profile. It was real easy to set up the 1600mhz profile. I think this ram is on every Asus QVL. I am looking into some faster RAM that are not in the list. There really is not that many choices for 2x8gb or 1600 or 1866 for the Asus p8z77 v pro. I imagine you are able to use any ram. I remember with older PC's just getting any ram in there and it would work as long as the ram was not dead or faulty. I would like to get G.SKILL Ripjaws X Series 2x8gb hope it works....