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Steel 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. Get Endless Performance Possibilities with Steel Style. Whether 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.

CPU

AMD Socket AM4

  • Supports AMD AM4 Socket Ryzen 3000, 3000 G-Series, 4000 G-Series, 5000 and 5000 G-Series Desktop Processors
  • Digi Power design
  • 10 Power Phase design
ChipsetAMD B550
Memory

4 x DDR4 DIMM sockets supporting up to 128 GB of system memory

  • Dual Channel DDR4 Memory Technology
  • AMD Ryzen series CPUs (Vermeer):
    • 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 memory
  • AMD Ryzen series CPUs (Matisse):
    • 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 memory
  • AMD Ryzen series APUs (Cezanne):
    • 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):
    • 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 (Picasso):
    • DDR4 3333+(OC) / 3200(OC) / 2933 / 2667 / 2400 / 2133 non-ECC, un-buffered memory
  • Supports Extreme Memory Profile (XMP) memory modules
  • 15μ Gold Contact in DIMM Slots
Onboard Graphics

Integrated Graphics Processor with AMD Radeon Graphics support:

  • 1 x HDMI
    • Supports HDMI 2.1 with max. resolution up to 4K x 2K (4096x2160) @ 60Hz
    • Supports HDR (High Dynamic Range) with HDMI 2.1
    • Picasso supports HDCP 2.2 with HDMI 2.0 Port
  • 1 x DisplayPort
    • 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)
Audio

7.1 CH HD Audio with Content Protection (Realtek ALC1220/ALC1200 Audio Codec)

  • Premium Blu-ray Audio support
  • Supports Surge Protection
  • PCB Isolate Shielding
  • Individual PCB Layers for R/L Audio Channel
  • Gold Audio Jacks
  • Nahimic Audio
LAN

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 PXE
Wireless Communication Module

None

Expansion Slots

AMD Ryzen series CPUs (Vermeer and Matisse)

  • 2 x PCI Express x16 Slots (PCIE1: Gen4x16 mode; PCIE3: Gen3 x4 mode)

AMD Ryzen series APUs (Cezanne and Renoir)

  • 2 x PCI Express x16 Slots (PCIE1: Gen3x16 mode; PCIE3: Gen3 x4 mode)

AMD Ryzen series APUs (Picasso)

  • 2 x PCI Express x16 Slots (PCIE1: Gen3x8 mode; PCIE3: Gen3 x4 mode)

1 x PCI Express 3.0 x1 Slot

Supports AMD Quad CrossFireX and CrossFireX

15μ Gold Contact in VGA PCIe Slot (PCIE1)

1 x M.2 Socket (Key E), supports type 2230 WiFi/BT PCIe WiFi module

Storage Interface

6 x SATA3 6.0 Gb/s Connectors, support NCQ, AHCI and Hot Plug

1 x Hyper M.2 Socket (M2_1), supports M Key type 2280 M.2 PCI Express module up to Gen4x4 (64 Gb/s) (with Vermeer, Matisse) or Gen3x4 (32 Gb/s) (with Cezanne, Renoir and Picasso)

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)

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

NVMe SSD is not supported with AMD Athlon 3000G Processors

Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices

USB

Rear:

  • 1 x USB 3.2 Gen2 Type-A Port (10 Gb/s)
  • 1 x USB 3.2 Gen2 Type-C Port (10 Gb/s)
  • 4 x USB 3.2 Gen1 Ports (ASMedia ASM1074 hub)
  • 2 x USB 2.0 Ports

Front:

  • 2 x USB 2.0 Headers (Support 4 USB 2.0 ports)
  • 2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports)

All USB ports support ESD Protection

Internal I/O Connectors
  • 1 x SPI TPM Header
  • 1 x Power LED and Speaker Header
  • 2 x RGB LED Headers
    • Support in total up to 12V/3A, 36W LED Strip
  • 2 x Addressable LED Headers
    • Support in total up to 5V/3A, 15W LED Strip
  • 1 x CPU Fan Connector (4-pin)
    • The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power
  • 1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)
    • The CPU/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power
  • 4 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan Speed Control)
    • The Chassis/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power
    • CPU_FAN2/WP, CHA_FAN1/WP, CHA_FAN2/WP, CHA_FAN3/WP and CHA_FAN4/WP can auto detect if 3-pin or 4-pin fan is in use
  • 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
  • 2 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)
Back Panel Connectors
  • 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)
  • 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 Button
  • HD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks)
I/O Controller

Not Specified

H/W Monitoring
  • Voltage detection
  • Temperature detection
  • Fan speed detection
  • Fan fail warning
  • Fan speed control
BIOS

1 x 256 Mbit flash

  • 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, 1.05V_PROM_S5, 2.5V_PROM, +1.8VSB, VDDP Voltage Multi-adjustment
Unique Features

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
  • 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

2.5G LAN

ASRock Steel Slot Gen4

ASRock Full Coverage M.2 Heatsink

ASRock Hyper M.2 (PCIe Gen4x4)

ASRock POST Status Checker (PSC)

ASRock Full Spike Protection (for all USB, Audio, LAN Ports)

ASRock Live Update & APP Shop

Bundled Software

Software

  • ASRock Motherboard Utility (A-Tuning)
  • ASRock Polychrome SYNC
    • These utilities can be downloaded from ASRock Live Update & APP Shop

UEFI

  • ASRock Full HD UEFI
  • ASRock Instant Flash
Operating System

Support for Windows 10 / 11 64-bit

Form Factor

Micro ATX Form Factor

  • 24.4cm x 24.4cm

Manufacturer
Manufacturer's WebsiteLink *
Product WebsiteLink *
Warranty Information
Warranty Duration3 Years
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ASRock B550M STEEL LEGEND, AMD B550 Chipset, Socket AM4, Micro ATX Desktop Motherboard

- Socket Socket AM4, AMD B550 Chipset
- Supports Ryzen 3000 to 5000 Series Processors
- 4 x DDR4 DIMM Slots, up to 128GB, DDR4-4733+
- 1 x PCIe 4.0 x16 Slot
- 1 x PCIe 3.0 x16 Slot (x4 Electrical)
- 1 x M.2 PCIe 4.0 NVMe Slot
- 1 x M.2 PCIe 3.0 x2 NVMe Slot
- 4 x SATA 3.0 Ports with RAID 0/1/10
- 2.5Gbps LAN
- 1 x HDMI 2.1, 1 x DisplayPort 1.4
- 1 x Rear USB Type-C 10Gb/s
- 1 x Rear USB Type-A 10Gb/s, 4 x Rear USB Type-A 5Gb/s
- 2 x Rear USB 2.0/1.1 Ports
- 1 x PS/2 Keyboard/Mouse Port
- 6 x Rear Audio Jacks, 1 x S/PDIF Out
- Integrated RGB & 2 x ARGB Gen2 Headers
- Form Factor: Micro ATX
- 3 Year Warranty

  • Product Code: 90-MXBCU0-A0UAYZ
  • Availability: Out Of Stock leadtimeTooltip Lead Times:
    • In Stock with Progenix: Ready for collection/dispatch once payment clears. The cut-off for same-day dispatch is 12:00pm on business days.
    • In Stock with Supplier: 1-3 business days until dispatched or ready for collection
    • Out Of Stock: Contact us to see if this item will be restocked.
OUT OF STOCK


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