ASRock B550 Steel Legend Socket AM4 Motherboard

Steel Legend represents the philosophical state of rock-solid durability and irresistible aesthetics. Built around the most demanding specifications and features, the Steel Legend series is aimed at everyday users and mainstream enthusiasts. Provides a wide variety of materials/components to ensure stable and reliable performance.

Get endless performance possibilities with Steel Style.
 
Unbeatable Heatsink Armor
Forged with aluminum alloy top cover that effectively improves heat dissipation. Underneath its solid, solid cover are two M.2 Key M sockets for games that require high-speed SSDs.
Dual M.2 sockets for SSD
Hyper M.2 socket that supports PCIe Gen4 x4, while the M.2 socket is capable of running PCIe Gen3 x2 and SATA3 mode.
 
Nahimic Audio
Whether you're using headphones, earphones, external or internal speakers, via USB, Wi-Fi, analog output or even HDMI, Nahimic Audio gives you the most engaging, vibrant and detail-rich listening experience.
 
Dr. MOS
Dr.MOS is the integrated power stage solution that is optimized for synchronous step-down voltage applications! Compared to traditional discrete MOSFETs, it intelligently provides higher current for each phase, thus providing improved thermal output and superior performance.
Premium 60A Power Choke
Compared to traditional chokes, ASRock's premium 60A power chokes effectively make the saturation current up to three times better, thus providing improved and improved Vcore voltage to the motherboard.
 
High density power connector
Reduces power loss by 23% and decreases connector temperature by 22 degrees Celsius.
8+4 12V Power Connectors Connector
24-pin ATX power supply
 
2oz copper PCB
2-ounce copper inner layers provide stable signal traces and power shapes! Offering lower temperature and higher power efficiency for overclocking, it is able to support the latest DDR4 memory modules with the most extreme memory performance.
 
RULE YOUR OWN LIGHTING PATH - RGB POLYCHROME
ASRock motherboards offer amazing performance and superior aesthetics to master your own form of colorful lighting! ASRock offers very complete control to make built-in RGB LEDs or connected LED strips, CPU fans, coolers, chassis and any RGB devices seamless. Devices can also be synced via Polychrome RGB Sync certified accessories.
 
2.5 Gb/s LAN
The 2.5Gb/s smart LAN platform is designed for maximum network performance for the demanding requirements of home networks, content creators, online gamers and high-quality streaming media. Increase network performance by up to 2.5 times the bandwidth compared to standard gigabit Ethernet, you'll enjoy a faster, uncompromised connectivity experience for gaming, file transfers and backups.
 
Reinforced steel slot [PCIe 4.0 version]
The reinforced steel slot comes with the next generation PCI Express 4.0 standard. The various benefits include:
  - Additional anchor points
  - Stronger latch
  - Ensure signal stability
  - Make sure heavy graphics cards are installed securely.
 
Front USB 3.2 Gen1 Type-C
The front USB 3.2 Gen1 Type-C header offers up to 5Gbps data transfer speed and a next-generation reversible USB design on the front panel of the computer case.
 
Dual USB 3.2 Gen2 (Type-A + Type-C)
This motherboard has a pair of integrated USB 3.2 Gen2 Type A and Type C ports built into the rear I/O to support next-generation USB 3.2 Gen2 devices and deliver data transfer speeds of up to 10 Gbps.
 
M.2 (KEY E) For WiFi
In addition to the integrated LAN port, users can also choose 802.11ac wireless connections via the M.2 (Key E) slot.
 
Dual graphics outputs
Complete with two most used connector types! Equipped with an HDMI + DisplayPort combo, you now have more graphics output options.

Characteristics

• Unique Feature
• ASRock 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
  • Premium Memory Alloy Choke (Reduces 70% core loss compared to iron powder choke)
  • 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 PCB
• 5G LAN
• ASRock Steel Slot Gen4
• ASRock Full Coverage M.2 Heatsink
• ASRock Hyper M.2 (PCIe Gen4x4)
• ASRock Ultra USB Power
• ASRock Full Spike Protection (for all USB, Audio, LAN Ports)
• ASRock Live Update & APP Shop
• CPU
  • Supports 3rd Gen AMD AM4 Ryzen™ / future AMD Ryzen™ Processors*
  • Digi Power design
  • 14 Power Phase design

• Chipset
  • AMD B550
• Memory
  • Dual Channel DDR4 Memory Technology
  • 4 x DDR4 DIMM Slots
  • 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 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
  • capacity of system memory: 128GB
  • Supports Extreme Memory Profile (XMP) memory modules
  • 15μ Gold Contact in DIMM Slots

• 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-adjustment
• Graphics
  • 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 (4096x2160) @ 60Hz
  • Supports DisplayPort 1.4 with max. resolution up to 5K (5120x2880)@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
• Audio
  • 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 Audio
• LAN
  • 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 PXE
• Slots
• AMD 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)*
  • 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 module
  • 15μ Gold Contact in VGA PCIe Slot (PCIE1)
• *Supports NVMe SSD as boot disks
• Storage
  • 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)**
  • 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 ASRock U.2 Kit
• Connector
  • 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
• 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 UEFI
• Software
  • 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 Toolbar
• Accessories
  • Quick Installation Guide, Support CD
  • 2 x SATA Data Cables
  • 3 x Screws for M.2 Sockets
  • 2 x Standoffs for M.2 Sockets
• Hardware 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 1.8V
• Form Factor
  • ATX Form Factor: 12.0-in x 9.6-in, 30.5 cm x 24.4 cm
  • 2oz Copper PCB
• OS
  • Microsoft® Windows® 10 64-bit
• Certifications
  • FCC, CE
  • ErP/EuP ready (ErP/EuP ready power supply is required)