Hynix Single Rank it looks like. 2X8GB. Now I have gotten to run 2400, and even 2666, but eventually my PC hard locks when gaming, even with CPU at stock clocks. I even put the XMP2.0 settings in manually and still cant it setup up right. So right now, my cpu is stock clocks and ram is 2133. Even as is, I love my ryzen setup. Still feels better then my 3930k @ 4.1 and quad channel 1886 DDR3. Just bummed I am struggling myself with having my ryzen setup not overclocked and ram stuck at 2133. One thing I have about my board, if the ram fails, it will reset settings. If a cpu overclock fails, I have to reset the bios, which I have a do a jumper switch on a 2017 motherboard, which I have to remove my GPU for. You are not gonna F***ing believe this. I completely missed this when I bought my board. My ram is on the list of QVL as a 32GB kit listed, but they only used 2X8GB sticks of it to get 2933 with XMP. My A1 and B1 slots only do 2400 with single rank. Using A2 and B2, they go up too 2667+. I switched my ram to those slots, and enabled XMP 2.0 2933. CPUZ shows it running at 1463.2. So its actually at 2926. I can live with that. Now to get a nice little OC stable on my CPU with the stock cooler till I can get an AIO. I have 90% of a custom loop already, but feel its 100% worthless at this point to get a block for my fury, and to do a custom loop on a 1500x. What ever the Ryzen refresh is of the 1600x, that is what Im gonna get and Ill water cooler that. Id be tickled to death to have a 1600X refresh at least 4.2+ and my ram at 2933*.