B550 Steel Legend

• Supports AMD AM4 Socket Ryzen™ 3000, 4000 G-Series and 5000 Series Desktop Processors*
• 14 Power Phase Design, Digi Power, Dr. MOS
• Supports DDR4 4733+ (OC)
• 1 PCIe 4.0 x16, 1 PCIe 3.0 x16, 2 PCIe 3.0 x1, 1 M.2 Key E for WiFi
• Graphics Output Options: HDMI, DisplayPort
• AMD CrossFireX™
• 7.1 CH HD Audio (Realtek ALC1220 Audio Codec), Nahimic Audio
• 6 SATA3, 1 Hyper M.2 (PCIe Gen4 x4), 1 M.2 (PCIe Gen3 x2 & SATA3)
• 2 USB 3.2 Gen2 (Rear Type A+C), 5 USB 3.2 Gen1 (2 Front, 2 Rear, 1 Front Type-C)
• Dragon 2.5G LAN
• *Not compatible with AMD Ryzen™ 5 3400G and Ryzen™ 3 3200G.

*Not compatible with AMD Ryzen™ 5 3400G and Ryzen™ 3 3200G.Chipset- AMD B550MEMORY- Dual Channel DDR4 Memory Technology
– 4 x DDR4 DIMM Slots
– AMD Ryzen series CPUs (Vermeer) 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 memory*
– AMD Ryzen series CPUs (Matisse) 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 memory*
– AMD Ryzen series APUs (Renoir) 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 memory*
– Max. capacity of system memory: 128GB**
– Supports Extreme Memory Profile (XMP) memory modules
– 15μ Gold Contact in DIMM Slots

*For Ryzen Series APUs (Renoir), ECC is only supported with PRO CPUs.
Please refer to below table for AMD non-XMP memory frequency support. For more details.

Ryzen Series CPUs (Vermeer):

Ryzen Series CPUs (Matisse):

Ryzen Series APUs (Renoir):

SR: Single rank DIMM, 1Rx4 or 1Rx8 on DIMM module label x=1 or 2
DR: Dual rank DIMM, 2Rx4 or 2Rx8 on DIMM module label

**Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows® 32-bit OS. For Windows® 64-bit OS with 64-bit CPU, there is no such limitation.BIOS- 256Mb AMI UEFI Legal BIOS with GUI support
– Supports “Plug and Play”
– ACPI 5.1 compliance wake up events
– Supports jumperfree
– SMBIOS 2.3 support
– CPU, CPU VDDCR_SOC, DRAM, VPPM, VTT_DDR Offset, CPU VDD 1.8 Voltage Multi-adjustmentGraphics- Integrated AMD Radeon™ Vega Series Graphics in Ryzen Series APU*
– DirectX 12, Pixel Shader 5.0
– Shared memory default 2GB. Max Shared memory supports up to 16GB.**
– Dual graphics output: support HDMI and DisplayPort 1.4 ports by independent display controllers
– Supports HDMI 2.1 with max. resolution up to 4K x 2K (4096×2160) @ 60Hz
– Supports DisplayPort 1.4 with max. resolution up to 5K (5120×2880)@120Hz
– Supports 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 2.1
– Supports HDCP 2.3 with HDMI 2.1 and DisplayPort 1.4 Ports
– Supports 4K Ultra HD (UHD) playback with HDMI 2.1 and DisplayPort 1.4 Ports
– Supports Microsoft® PlayReady

*Actual support may vary by CPU

**The Max shared memory 16GB requires 32GB system memory installed.Audio- 7.1 CH HD Audio with Content Protection (Realtek ALC1220 Audio Codec)
– Premium Blu-ray Audio support
– Supports Surge Protection
– 120dB SNR DAC with Differential Amplifier
– NE5532 Premium Headset Amplifier for Front Panel Audio Connector (Supports up to 600 Ohm headsets)
– Pure Power-In
– Direct Drive Technology
– PCB Isolate Shielding
– Impedance Sensing on Rear Out port
– Individual PCB Layers for R/L Audio Channel
– Gold Audio Jacks
– 15μ Gold Audio Connector
– Nahimic AudioLAN- 2.5 Gigabit LAN 10/100/1000/2500 Mb/s
– Dragon RTL8125BG
– Supports Dragon 2.5G LAN Software
– Smart Auto Adjust Bandwidth Control
– Visual User Friendly UI
– Visual Network Usage Statistics
– Optimized Default Setting for Game, Browser, and Streaming Modes
– User Customized Priority Control
– Supports Wake-On-LAN
– Supports Lightning/ESD Protection
– Supports Energy Efficient Ethernet 802.3az
– Supports PXESlotsAMD Ryzen series CPUs (Vermeer and Matisse)
– 2 x PCI Express x16 Slots (PCIE1: Gen4x16 mode; PCIE3: Gen3 x4 mode)*
AMD Ryzen series APUs (Renoir)
– 2 x PCI Express x16 Slots (PCIE1: Gen3x16 mode; PCIE3: Gen3 x4 mode)*
– 2 x PCI Express 3.0 x1 Slots
– Supports AMD Quad CrossFireX™ and CrossFireX™
– 1 x M.2 Socket (Key E), supports type 2230 WiFi/BT PCIe WiFi module
– 15μ Gold Contact in VGA PCIe Slot (PCIE1)

*Supports NVMe SSD as boot disksStorage- 6 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot Plug*
– 1 x Hyper M.2 Socket (M2_1), supports M Key type 2230/2242/2260/2280 M.2 PCI Express module up to Gen4x4 (64 Gb/s) (with Matisse) or Gen3x4 (32 Gb/s) (with Renoir)**
– 1 x M.2 Socket (M2_2), supports M Key type 2230/2242/2260/2280/22110 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s)**

*M2_2 and SATA3_5_6 share lanes. If either one of them is in use, the other one will be disabled.

**Supports NVMe SSD as boot disks
Supports ASRock U.2 KitConnector- 1 x SPI TPM Header
– 1 x Power LED and Speaker Header
– 2 x RGB LED Headers*
– 2 x Addressable LED Headers**
– 1 x CPU Fan Connector (4-pin)***
– 1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)****
– 5 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 Connector (15μ Gold Audio Connector)
– 2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD Protection)
– 1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports) (Supports ESD Protection)
– 1 x Front Panel Type C USB 3.2 Gen1 Header (Supports ESD Protection)
– 1 x Dr. Debug with LED

*Support in total up to 12V/3A, 36W LED Strip

**Support in total up to 5V/3A, 15W LED Strip

***The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power.

****CPU_FAN2/WP_3A supports the water cooler fan of maximum 3A (36W) fan power.

*****The Chassis/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power.

******CPU_FAN2/WP_3A, CHA_FAN1/WP, CHA_FAN2/WP, CHA_FAN3/WP, CHA_FAN4/WP and CHA_FAN5/WP can auto detect if 3-pin or 4-pin fan is in use.Rear Panel I/O- 2 x Antenna Mounting Points
– 1 x PS/2 Mouse/Keyboard Port
– 1 x HDMI Port
– 1 x DisplayPort 1.4
– 1 x Optical SPDIF Out Port
– 1 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)
– 2 x USB 3.2 Gen1 Ports (Supports ESD Protection)
– 4 x USB 2.0 Ports (Supports ESD Protection)*
– 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
– HD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks)

*Ultra USB Power is supported on USB_34 ports.
ACPI wake-up function is not supported on USB_34 ports.Software and UEFISoftware
– ASRock Motherboard Utility (A-Tuning)
– ASRock Dragon 2.5G LAN Software
– ASRock Polychrome SYNC*
UEFI
– ASRock Full HD UEFI
– ASRock Instant Flash

*These utilities can be downloaded from ASRock Live Update & APP Shop.Support CD- Drivers, Utilities, AntiVirus Software (Trial Version), Google Chrome Browser and ToolbarAccessories- Quick Installation Guide, Support CD
– 2 x SATA Data Cables
– 3 x Screws for M.2 Sockets
– 2 x Standoffs for M.2 SocketsHardware Monitor- Temperature Sensing: CPU, CPU/Water Pump, Chassis/Water Pump Fans
– Fan Tachometer: CPU, CPU/Water Pump, Chassis/Water Pump Fans
– Quiet Fan (Auto adjust chassis fan speed by CPU temperature): CPU, CPU/Water Pump, Chassis/Water Pump Fans
– Fan Multi-Speed Control: CPU, CPU/Water Pump, Chassis/Water Pump Fans
– Voltage monitoring: +12V, +5V, +3.3V, CPU Vcore, CPU VDDCR_SOC, DRAM, VPPM, CPU VDD 1.8VForm Factor- ATX Form Factor: 12.0-in x 9.6-in, 30.5 cm x 24.4 cm
– 2oz Copper PCBOS- Microsoft® Windows® 10 64-bitCertifications- FCC, CE
– ErP/EuP ready (ErP/EuP ready power supply is required)Warranty3 YearsNote*Price, feature and specifications are subject to change without notice