Components > Motherboards

Asrock B550 STEEL LEGEND, AMD B550, AM4, ATX, 4 DDR4, HDMI, DP, XFire, 2.5GB LAN, PCIe4, RGB Lighting, M.2

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PLEASE NOTE:

Ryzen 4100, 4500, 4600G, 5500, 5700X, 5800X3D,
5600G & 5700G CPUs may require a BIOS update

Stock Code

ASMBB550STEELLEGEND

Manufacturer

ASROCK

Manufacturer Code

B550 STEEL LEGEND

EAN Number

4710483931567

Printable Version

80 Available

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Motherboard Type

Desktop

Form Factor

ATX

Socket

AMD AM4

Chipset

AMD B550

CPU Support

Click here for CPU support

*Note: not compatible with Ryzen 5 3400G & Ryzen 3 3200G CPUs

RAM Technology

DDR4 (Dual Channel)

RAM Slots

4 x DIMM

RAM Speeds

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 MHz

Maximum Memory

128GB

Graphics

Integrated Graphics Processor*

Graphics specifications may vary between CPU types

Graphics Ports

1 x HDMI
1 x DisplayPort

Multi-GPU Support

Supports AMD Quad CrossFireX and CrossFireX

PCI/PCI Express

2 x PCIe 3.0 x1
2 x PCIe 4.0 x16

Storage

6 x SATA III
1 x M.2 (2230/2242/2260/2280) - PCIe
1 x M.2 (2230/2242/2260/2280/22110) - SATA & PCIe

RAID

RAID 0, 1, 10

Wireless

LAN

2.5GB LAN

Audio

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

USB Ports Supported

2 x USB 3.2 Gen2 (1 Type-A & 1 Type-C at back)
4 x USB 3.2 Gen1 (2 at back, 2 at mid-board)
8 x USB 2.0 (4 at back, 4 at mid-board)
1 x Front Panel Type-C USB 3.2 Gen1 Header

Back Panel I/O Ports

2 x Antenna Mounting Points
1 x PS/2 Mouse/Keyboard
1 x HDMI
1 x DisplayPort 1.4
1 x Optical SPDIF Out
1 x USB 3.2 Gen2 Type-A
1 x USB 3.2 Gen2 Type-C
2 x USB 3.2 Gen1
4 x USB 2.0
1 x RJ-45 LAN
HD Audio Jacks

Internal I/O Connectors

1 x SPI TPM
1 x Power LED and Speaker
2 x RGB LED
2 x Addressable LED
1 x CPU Fan
1 x CPU/Water Pump Fan
5 x Chassis/Water Pump Fan
1 x 24 pin ATX
1 x 8 pin 12V
1 x 4 pin 12V
1 x Front Audio
2 x USB 2.0

1 x USB 3.2 Gen1
1 x Dr. Debug with LED
1 x Front Panel Type C USB 3.2 Gen1 Header

Accessories

2 x SATA Data Cables
3 x Screws for M.2 Sockets
2 x Standoffs for M.2 Sockets

Additional Features

See Overview

Package Type

Retail

Package Weight

2.3700 kg

Warranty

3 Year Replacement Warranty

Full Box Quantity

Manufacturer Link

Click here for more details from the manufacturer

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.

Supports 3rd Gen AMD AM4 Ryzen™ / Future AMD Ryzen™ 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

Unbeatable Heatsink Armor

Forged with aluminum alloy heatsinnk top cover that effectively improves heat dissipation. Underneath its solid strong cover lie two gaming required M.2 Key M sockets for high speed SSDs.

Dual M.2 Sockets for SSD

Hyper M.2 socket that supports PCIe Gen4 x4 while M.2 socket is capable of running PCIe Gen3 x2 and SATA3 mode.

Nahimic Audio

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.

The Sound Tracker is a visual indicator that points out the directions from which predominant sounds are coming. Each sound is properly positioned in 360° on a radar for a full immersion during the game.

Dr. MOS

Dr.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 Choke

Compared 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.

14 Power Phase Design

Featuring sturdy components and completely smooth power delivery to the CPU. Plus, it offers unmatched overclocking capabilities and enhanced performance with the lowest temperature for advanced gamers as well.

Hi-Density Power Connector

Reduces 23% power loss and decreases the connector’s temperature by 22 degrees Celsius.

8+4 12V Power Connectors

24-pin ATX Power Connector

2oz Copper PCB

2 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!

Rule Your Own Lighting Way - Polychrome RGB

ASRock motherboards deliver stunning performance and superior aesthetics to rule your own colorful lighting way! ASRock offers a very comprehensive control to perform the built-in RGB LEDs or the connected LED strips, CPU fans, coolers, chassis and any RGB devices smoothly. Devices can be synchronized across the Polychrome RGB Sync-certified accessories as well.

Dragon 2.5 Gb/s LAN

The 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.

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:

- Extra anchor points

- Stronger latch

- Ensure signal stability

- Make sure heavy graphics cards to be well-installed.

Front USB 3.2 Gen1 Type-C

Front USB 3.2 Gen1 Type-C header delivers up to 5 Gbps data transfer rate and next generation reversible USB design to the front panel of computer case.

Dual USB 3.2 Gen2 (Type-A + Type-C)

This motherboard has a pair of onboard Type-A and Type-C USB 3.2 Gen2 ports built on the rear i/o for supporting next generation USB 3.2 Gen2 devices and to deliver up to 10 Gbps data transfer rates.

M.2 (KEY E) For WiFi

Besides the onboard LAN port, users may also choose 802.11ac wireless connections by M.2 (Key E) slot.

*Wi-Fi module is not included.

Flexible Integrated I/O Shield

Unlike most so called pre-mounted I/O shield that is only decorated with fancy color schemes. We reserve more tolerance space and allow IO shield is adjustable when installing, thus fitting chassis perfectly without any mechanical issue.

Dual Graphics Outputs

Complete with two types of most used connectors! Packed with a HDMI + DisplayPort combo, you have more graphics output options now.

AMD StoreMI Technology

A powerful tool that combines the speed of your SSD with the capacity of your hard disk into a single, fast, easy-to-manage drive, AMD StoreMI technology “combines” these two types of storage into a single drive and automatically moves the data you access the most to the SSD, so you get the best of both worlds.

XXL Aluminum Alloy Heatsink

Extra large aluminum alloy heat sinks that effectively take away heat from the MOSFET and chipset so that your whole system may perform more stable.

Premium 60A Power Choke

Dr. MOS

Dr.MOS is the integrated power stage solution which is optimized for synchronous buck-set down voltage applications! Intelligently delivering higher current and driving up to 50A continuous current for each phase, thus providing improved thermal result and superior performance.

Premium Memory Alloy Choke

Specifically designed for memory power delivery, these new alloy chokes feature a highly magnetic and heat resistant design, thus delivering more stable and reliable power to the motherboard and memory modules.

Nichicon 12K Black Caps

Supreme 12K black capacitors with lifespans of at least 12,000 hours. Compared to other counterparts on high-end motherboards that merely have lifespans of around 10,000 hours, ASRock applied Nichicon 12K Black Caps that offer 20% longer lifespans and provide more stability and reliability.

I/O Armor

A new designed protective cover for all of the crucial parts near the motherboard's rear I/O, so that they won't easily be damaged by static electricity.

Matte Black PCB

A new mysterious matte black and copper color scheme to match the prestigious components on ASRock's high-end motherboards.

High Density Glass Fabric PCB

High Density Glass Fabric PCB design that reduces the gaps between the PCB layers to protect the motherboard against electrical shorts caused by humidity.

2oz Copper PCB

Using only carefully selected copper materials for PCB layers, 2oz Copper PCB delivers lower temperature and higher energy efficiency for overclocking.

Gold Audio Jacks

Everything will wear off in time, but gold looks better! Gold audio jack provides stable sound transmission!

Full Spike Protection

Some sensitive digital components on the motherboard are vulnerable to power surges, the excessive current may cause your system to malfunction immediately. ASRock Full Spike Protection includes various technologies to prevent your motherboard’s components from being damaged by these unexpected voltage spikes.

Live Update & APP Shop

ASRock Live Update & APP Shop is designed for your convenience. We provide various apps and support software for users to download. You can also easily optimize your system and keep your motherboard up to date with ASRock Live Update & APP Shop.