Supports 3rd Gen AMD AM4 Ryzen / Future AMD Ryzen Processors10 Power Phase Design, Dr. MOSSupports DDR4 4733+ (OC)1 PCIe 4.0 x16, 1 PCIe 3.0 x16, 1 PCIe 3.0 x1, 1 M.2 Key E for WiFiGraphics Output Options: HDMI, DisplayPortAMD CrossFireX7.1 CH HD Audio (Realtek ALC1200 Audio Codec), Nahimic Audio6 SATA3, 1 Hyper M.2 (PCIe Gen4 x4), 1 M.2 (PCIe Gen3 x2 & SATA3)2 USB 3.2 Gen2 (Rear Type A+C), 8 USB 3.2 Gen1 (4 Front, 4 Rear)Dragon 2.5G LANSteel Legend represents the philosophical state of rock-solid durability and irresistible aesthetics. Built around most demanding specs and features, the Steel Legend series aims at daily users and mainstream enthusiasts! Providing a strong array of materials/components to ensure a stable and reliable performance.Nahimic AudioWhether you are using headphones, a headset, external or internal speakers, via USB, Wi-Fi, analog output or even HDMI, Nahimic Audio offers you the most engaging listening experience, vibrant and rich with details.Dr. MOSDr.MOS is the integrated power stage solution which is optimized for synchronous buck-set down voltage applications! Compared to traditional discrete MOSFETs, it intelligently delivers higher current for each phase, thus providing improved thermal result and superior performance.Premium 60A Power ChokeCompared to traditional chokes, ASRock's premium 60A power chokes effectively make the saturation current up to three times better, thus providing enhanced and improved Vcore voltage to the motherboard.Hi-Density Power ConnectorReduces 23% power loss and decreases the connector's temperature by 22 degrees Celsius.8+4 12V Power Connectors24-pin ATX Power Connector2oz Copper PCB2 ounce copper inner layers that provide stable signal traces and power shapes! Delivering lower temperature and higher energy efficiency for overclocking, it's able to support the latest DDR4 memory modules with most extreme memory performance!Dragon 2.5 Gb/s LANThe intelligent 2.5Gb/s LAN platform is built for maximum networking performance for the demanding requirements of home networking, content creators, online gamers and high-quality streaming media. Boost networking performance up to 2.5X the bandwidth compared to the standard gigabit Ethernet, you'll enjoy the faster and uncompromised connectivity experience for gaming, file transfers and backups.SpecificationsUnique FeatureASRock USB 3.2 Gen2- ASRock USB 3.2 Gen2 Type-A Port (10 Gb/s)- ASRock USB 3.2 Gen2 Type-C Port (10 Gb/s)ASRock Super Alloy- XXL Aluminum Alloy Heatsink- Premium 60A Power Choke- 50A Dr.MOS- Nichicon 12K Black Caps (100% Japan made high quality conductive polymer capacitors)- I/O Armor- Matte Black PCB- High Density Glass Fabric PCB- 2oz Copper PCB2.5G LANASRock Steel Slot Gen4ASRock Full Coverage M.2 HeatsinkASRock Hyper M.2 (PCIe Gen4x4)ASRock POST Status Checker (PSC)ASRock Full Spike Protection (for all USB, Audio, LAN Ports)ASRock Live Update & APP ShopCPUSupports 3rd Gen AMD AM4 Ryzen / future AMD Ryzen ProcessorsDigi Power design10 Power Phase design*Not compatible with AMD Ryzen 5 3400G and Ryzen 3 3200G.ChipsetAMD B550MemoryDual Channel DDR4 Memory Technology4 x DDR4 DIMM SlotsAMD Ryzen series CPUs (Matisse) support DDR4 4533+(OC) / 4466(OC) / 4400(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3800(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memoryAMD Ryzen series APUs support DDR4 4733+(OC) / 4666(OC) / 4600(OC) / 4533(OC) / 4466(OC) / 4400(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3800(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memoryMax. capacity of system memory: 128GBSupports Extreme Memory Profile (XMP) memory modules15µ Gold Contact in DIMM SlotsBIOS256Mb AMI UEFI Legal BIOS with GUI supportSupports "Plug and Play"ACPI 5.1 compliance wake up eventsSupports jumperfreeSMBIOS 2.3 supportCPU, CPU VDDCR_SOC, DRAM, VPPM, 1.05V_PROM_S5, 2.5V_PROM, +1.8VSB, VDDP Voltage Multi-adjustmentGraphicsIntegrated AMD Radeon Vega Series Graphics in Ryzen Series APUDirectX 12, Pixel Shader 5.0Shared memory default 2GB. Max Shared memory supports up to 16GB.Dual graphics output: support HDMI and DisplayPort 1.4 ports by independent display controllersSupports HDMI 2.1 with max. resolution up to 4K x 2K (4096x2160) @ 60HzSupports DisplayPort 1.4 with max. resolution up to 5K (5120x2880)@120HzSupports Auto Lip Sync, Deep Color (12bpc), xvYCC and HBR (High Bit Rate Audio) with HDMI 2.1 Port (Compliant HDMI monitor is required)Supports HDR (High Dynamic Range) with HDMI 2.1Supports HDCP 2.3 with HDMI 2.1 and DisplayPort 1.4 PortsSupports 4K Ultra HD (UHD) playback with HDMI 2.1 and DisplayPort 1.4 PortsSupports Microsoft PlayReadyAudio7.1 CH HD Audio with Content Protection (Realtek ALC1200 Audio Codec)Premium Blu-ray Audio supportSupports Surge ProtectionPCB Isolate ShieldingIndividual PCB Layers for R/L Audio ChannelGold Audio JacksNahimic AudioLAN2.5 Gigabit LAN 10/100/1000/2500 Mb/sDragon RTL8125BGSupports Dragon 2.5G LAN SoftwareSmart Auto Adjust Bandwidth ControlVisual User Friendly UIVisual Network Usage StatisticsOptimized Default Setting for Game, Browser, and Streaming ModesUser Customized Priority ControlSupports Wake-On-LANSupports Lightning/ESD ProtectionSupports Energy Efficient Ethernet 802.3azSupports PXESlotsAMD Ryzen series CPUs (Matisse)- 2 x PCI Express x16 Slots (PCIE1: Gen4x16 mode; PCIE3: Gen3 x4 mode)AMD Ryzen series APUs- 2 x PCI Express x16 Slots (PCIE1: Gen3x16 mode; PCIE3: Gen3 x4 mode)1 x PCI Express 3.0 x1 SlotSupports AMD Quad CrossFireX and CrossFireX15µ Gold Contact in VGA PCIe Slot (PCIE1)1 x M.2 Socket (Key E), supports type 2230 WiFi/BT moduleStorage6 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot Plug1 x Hyper M.2 Socket (M2_1), supports M Key type 2280 M.2 PCI Express module up to Gen4x4 (64 Gb/s) (with Matisse) or Gen3x4 (32 Gb/s)1 x M.2 Socket (M2_2), supports M Key type 2280 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s)Connector1 x SPI TPM Header1 x Power LED and Speaker Header2 x RGB LED Headers2 x Addressable LED Headers1 x CPU Fan Connector (4-pin)1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)4 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan Speed Control)1 x 24 pin ATX Power Connector (Hi-Density Power Connector)1 x 8 pin 12V Power Connector (Hi-Density Power Connector)1 x 4 pin 12V Power Connector (Hi-Density Power Connector)1 x Front Panel Audio Connector2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD Protection)2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports) (Supports ESD Protection)Rear Panel I/O2 x Antenna Mounting Points1 x PS/2 Mouse/Keyboard Port1 x HDMI Port1 x DisplayPort 1.41 x Optical SPDIF Out Port1 x USB 3.2 Gen2 Type-A Port (10 Gb/s) (Supports ESD Protection)1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) (Supports ESD Protection)4 x USB 3.2 Gen1 Ports (ASMedia ASM1074 hub) (Supports ESD Protection)2 x USB 2.0 Ports (Supports ESD Protection)1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)1 x Clear CMOS ButtonHD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks)Software and UEFISoftware- ASRock Motherboard Utility (A-Tuning)- ASRock Polychrome SYNCUEFI- ASRock Full HD UEFI- ASRock Instant FlashSupport CDDrivers, Utilities, AntiVirus Software (Trial Version), Google Chrome Browser and ToolbarAccessoriesQuick Installation Guide, Support CD2 x SATA Data Cables2 x Screws for M.2 SocketsHardware MonitorTemperature Sensing: CPU, CPU/Water Pump, Chassis/Water Pump FansFan Tachometer: CPU, CPU/Water Pump, Chassis/Water Pump FansQuiet Fan (Auto adjust chassis fan speed by CPU temperature): CPU, CPU/Water Pump, Chassis/Water Pump FansFan Multi-Speed Control: CPU, CPU/Water Pump, Chassis/Water Pump FansVoltage monitoring: +12V, +5V, +3.3V, CPU Vcore, CPU VDDCR_SOC, DRAM, VPPM, 1.05V_PROM_S5, +1.8V, VDDPForm FactorMicro ATX Form Factor: 9.6-in x 9.6-in, 24.4 cm x 24.4 cm2oz Copper PCBOSMicrosoft Windows 10 64-bitCertificationsFCC, CEErP/EuP ready (ErP/EuP ready power supply is required)