Gaming Armor Memory - 15 Gold Contact in DIMM Slots Audio - Creative Sound Blaster Cinema 3 Unique Feature ASRock Super Alloy - Premium Power Choke - Matte Black PCB - High Density Glass Fabric PCB - 2oz Copper PCB ASRock Steel Slots ASRock Ultra M.2 (PCIe Gen3 x4) ASRock Full Spike Protection (for all USB, Audio, LAN Ports) ASRock Live Update APP Shop CPU - Supports AMD Socket AM4 A-Series APUs (Bristol Ridge) and Ryzen Series CPUs (Summit Ridge) - Digi Power design - 9 Power Phase design - Supports 95W Air Cooling Chipset - AMD Promontory B350 Memory - Dual Channel DDR4 Memory Technology - 4 x DDR4 DIMM Slots - AMD Ryzen series CPUs support DDR4 3200+(OC)/2933(OC)/2667/2400/2133 ECC non-ECC, un-buffered memory* - AMD 7th Gen A-Series APUs support DDR4 2400/2133 ECC non-ECC, un-buffered memory* - Max. capacity of system memory: 64GB** - 15 Gold Contact in DIMM Slots *Please refer to Memory Support List on ASRock's website for more information. Please refer to below table for DDR4 UDIMM maximum frequency support. A-Series APUs: UDIMM Memory Slot Frequency(MHZ) A1 A2 B1 B2 - SR - - 2400 - DR - - 2400 - SR - SR 2400 - DR - DR 2133 SR SR SR SR 1866 SR/DR DR SR/DR DR 1866 Ryzen Series CPUs: UDIMM Memory Slot Frequency(MHZ) A1 A2 B1 B2 -