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delivered in 4-5 days
3 year on-site PC warranty*
including parts & labour

ASRock B450 Steel Legend AMD Motherboard

CCL Code: MBD2626
Manufacturer Code: 90-MXBA00-A0UAYZ
| Manufacturer: ASRock

Key Features:

  • Socket AM4
  • AMD B450 Chipset
  • 6 x SATA & 8 x USB Ports
  • DDR4 (max 64GB, 4 slots)
  • HDMI and Display Port
  • ATX Form Factor


Sorry, this product has been discontinued. We have found some similar products below.


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. A motherboard that fulfills every task – with style!


Steel legend 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.

*The addressable RGB LED header supports WS2812B addressable RGB LED strip (5V/Data/GND), with a maximum power rating of 3A (5V), a max of 80 LEDs and length within 2 meters.
*The RGB LED header supports standard 5050 RGB LED strip (12V/G/R/B), with a maximum power rating of 3A (12V) and length within 2 meters.


Dual M.2 For SSD, Supports Type 22110 M.2Two of the world’s fastest M.2 slots. One delivers up to PCIe Gen3 x4 32Gb/s transfer speed, the other one supports PCIe Gen3 x2 & SATA3 6Gb/s mode.

M.2 ArmorsGood M.2 SSD protection is important for longevity and stability. ASRock provides a completed M.2 armor solution on B365 platform that makes SSDs to run in a certain low temperature.

Dual USB 3.1 Gen2 (Type-A + Type-C)

This motherboard has a pair of onboard Type-A and Type-C USB 3.1 Gen2 ports built on the rear i/o for supporting next generation USB 3.1 Gen2 devices and to deliver up to 10 Gbps data transfer rates.


+5V voltage is transferred from the +12V. Supplying enough current to USB devices without dropping voltage directly from the PSU.


Protect mouse/keyboard against static electricity, especially lowering the chances of USB mouse lag or stuttering.


USB speaker is suggested to be connected via Ultra USB Power ports to perform the pure current and offer high audio quality without distortion.

2oz Copper

It comes with 2 ounces copper inner layers, using only carefully selected copper materials for PCB layers, delivering lower temperature and higher energy efficiency for overclocking.


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.


The advanced PCI-E Steel Slot packed with solid cover that prevent any signal interference with graphics cards. It also ensures the heavy graphics cards to be well-installed in the PCI-E slot safely.

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

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.

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.

Sapphire Black PCB

Pure black PCB appearance. The new Sapphire Black PCB represents rock-solid quality and gives the motherboard a more mysterious touch.

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.

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.

Main Features

  • AMD AM4 Socket
  • Supports DDR4 3533+ (OC)
  • 2 PCIe 3.0 x16, 4 PCIe 2.0 x1
  • AMD Quad CrossFireX™
  • Graphics Output: DisplayPort, HDMI
  • 7.1 CH HD Audio (Realtek ALC892 Audio Codec), Nichicon Fine Gold Series Audio Caps
  • 6 SATA3, 1 Ultra M.2 (PCIe Gen3 x4), 1 M.2 (PCIe Gen3 x2 & SATA3)
  • 2 USB 3.1 Gen2 (Rear Type-A+C)
  • 6 USB 3.1 Gen1 (2 Front, 4 Rear)
  • Realtek Gigabit LAN


CPU Socket Socket AM4
Installed Processors (Max) 0 (1)
Supported Processor Manufacturer AMD
64-bit Support Yes
Socket AM4

Rear Panel I/O Ports

USB Ports 1 x USB 3.1 Type-C
1 x USB 3.1 Type-A
4 x USB 3.0
2 x USB 2.0
DisplayPorts 1 x DisplayPort 1.2
HDMI Port 1 x HDMI
Keyboard/Mouse Combo Port 1 x PS/2
RJ-45 Ports 1 x RJ-45
Audio Line In Ports 1 x 3.5mm Jack
Audio Line Out Ports 3 x 3.5mm Jack
Microphone In Port 1 x 3.5mm Jack
S/PDIF Port 1 x S/PDIF Optical Out

Internal I/O Connectors

SATA Connectors 6 x SATA III
USB Connectors 1 x USB 3.0
2 x USB 2.0
Speaker 1 x Speaker
Front Panel Connectors 1 x Front Panel
1 x Front Audio
Cooling Fan Support 1 x CPU Fan
1 x CPU/Water Pump Fan
3 x Chassis/Water Pump Fans
1 x AMD Fan
Serial Connectors 1 x COM
TPM Header 1 x TPM
Power Connector Port 1 x 20+4-pin ATX
1 x 4+4-pin EPS
Other Connectors 1 x M.2, M Key (Type 2230/2242/2260/2280)
1 x M.2, M Key (Type 2230/2242/2260/2280/22110)
1 x RGB LED header
1 x Addressable LED header


Memory Bus Speed Up to 3533 MHz
Memory Type DDR4
Maximum RAM 64 GB
Memory Slot 4 x DIMM


Chipset Manufacturer AMD
Northbridge B450
RAID Supported Yes
RAID Format RAID 0, 1, 10
SATA Supported Yes


Number of PCI Express Slots 2 x PCI Express 3.0 x16 slots (@ x16/x4, x8/x4 or x4/x4)
4 x PCI Express 2.0 x1

Graphics Device

Integrated Graphics Supported Yes


Integrated Sound Realtek ALC892


Integrated Network Realtek RTL8111H
Network Speeds Supported 10/100/1000 Mbps
Wireless LAN No
Bluetooth No

System Requirements

Operating Systems Supported Microsoft® Windows® 10 64-bit


SLi/Crossfire Features Supports AMD Quad CrossFireX™ and CrossFireX™


Form Factor ATX Motherboard
In The Box ASRock B450 Steel Legend Motherboard
Quick Installation Guide
Support CD
I/O Shield
2 x SATA Data Cables
2 x Screws for M.2 Sockets
1 x Standoff for M.2 Socket
Width 305 mm
Length 244 mm

Key Features

Firewire No
Wireless Network No
Memory Channel Dual
On-board Audio Type 7.1
Number of SATA Ports 6 port(s)
Number of USB Ports 8 port(s)
SATA III Support Yes
USB 3.0 Support Yes
Multi GPU Support ATi CrossFire
VGA Connection No
DVI Connection No
HDMI Connection Yes
DisplayPort Connection Yes
Motherboard Form Factor ATX
Motherboard Power Connectors 8-Pin
Motherboard Chipset AMD B450
Thunderbolt No
USB 3.1 Support Yes
Internal USB3.0 Header Yes
M.2 Support Yes
On-board RGB Control ASRock RGB LED
Skip Audio Test No
RGB Header Type 3-Pin ARGB
Addressable RGB Yes


Warranty 1 Year

Item Details

Manufacturer ASRock
Manufacturer Code 90-MXBA00-A0UAYZ
EAN 4717677338065
Condition New

Warranty Information

Warranty 1 Year

Manufacturer Information

Manufacturer ASRock
Manufacturer Code 90-MXBA00-A0UAYZ
Questions and Answers

Do you have you a question about the ASRock B450 Steel Legend AMD Socket AM4 B450 Chipset ATX Motherboard?

Q: Can you connect an ARGB controller to the ARGB header for case fans whilst also utilise the RGN header for an RGB AIO?
Answer by Website User on 21st July 2021
That should be fine but I cannot guarantee this. - Kristian N
0 customers found this answer helpful.
Post Answer
Q: Will the Western Digital Green 240GB M.2-2280 SATA III SSD work on this board?
Answer by Website User on 18th September 2020
Yes, it would. -MR
0 customers found this answer helpful.
Post Answer
Q: Do I have to pay £10 extra for a BIOS update so that it works for Ryzen 3rd gen, or can I buy this and it'll come Ryzen 3rd gen ready without paying for the BIOS update for £10?
Answer by Website User on 13th July 2020
This should now support 3rd Gen Ryzen out of the box, however if you would like us to update it to the latest stable BIOS you can add CCL product SER0007 to your basket. -MR
0 customers found this answer helpful.
Post Answer
Q: Which BIOS version does the board come with?
Answer by Website User on 14th April 2020
ASRock do not provide a BIOS version on their product that we can easily check. -MR
0 customers found this answer helpful.
Answer by Dave on 23rd August 2021
Contrary to the previous answer, ASRock DO provide an easily-checked version on their products - stuck to the BIOS chip. When I received mine, the box was not sealed or in any way preventing it from being checked. The BIOS version was P3.50. It's fine for Ryzen 3000 series, but will NOT work for Ryzen 5000 and there is no way to update without a compatible CPU.
0 customers found this answer helpful.
Post Answer
Q: On AM4 boards it only comes with 1 year warranty. Previous boards used to come with 2/3 years. Any reason for this?
Answer by Website User on 14th April 2020
If the manufacturer has not specified the warranty to us the website will default to one year. -MR
0 customers found this answer helpful.
Post Answer
Q: is this ryzen 3rd gen ready out of the box?
Answer by Website User on 14th April 2020
These boards now include a BIOS which supports 3rd Gen Ryzen processors. -MR
3 customers found this answer helpful.
Post Answer
Q: Is this ready to go with ryzen 3000 series cpu's? Does it need a BIOS update before installing cpu?
Answer by Website User on 7th April 2020
It should come with a BIOS that is capable of supporting 3000 series processors. -MR
2 customers found this answer helpful.
Post Answer
Q: Will this motherboard work with an Nvidia graphics card (specifically the GTX 1050)?
Answer by Website User on 24th March 2020
Yes, it will work fine. -MR
0 customers found this answer helpful.
Post Answer
4 / 5 18 reviews


10 months ago

Came quickly and an affordable yet high quality motherboard, syncs almost all my rgb products minus the RAM but I knew that when purchasing, easy to install and the instructions were clear. As a first time pc builder it was a good option

Theo Docherty

July 2020

Great motherboard and also the most competitive price I have found. Great customer service.

Mr Chris Burford

July 2020

After a lot of research into motherboards, I settled on this one. The quality is really nice and the LED lighting really looks nice and not too overwhelming. Really easy setup too.

kieron thurman

July 2020

Qaulity Motherboard


June 2020

Good price for a mid / high range motherboard


June 2020

A very good motherboard with everything on it that I needed! And a very good price!


May 2020

Its a solid enough mobo. Does what it needs todo. Came ryzen 3 ready so thats good. M.2 is fiddely to install but i got big fingers so small screws are a challenge Looks neat all set up.

Aleksejs Romanovskis

May 2020

Best service and quality for this money !


May 2020

Only thing missing on this motherboard is a diagnostic speaker other then that love it.


April 2020

Perfect. Fast delivery, great customer service


March 2020

Just fabulous

mark walton

February 2020

Excellent product excellent delivery


January 2020

For a mid range board, can't realy fault it... major bios changes are more stable after a full power off rebooot


November 2019

Solid build quality and lighting and bios is also good. Great purchase. Is also ryzen 3000 compatible out of the box


August 2019

Fantastic AMD/AM4 motherboard. Board looks on par with other premium branded boards with great build quality. Only wish is for more internal headers. USB, Add-RGB, fan headers etc. Not the absolute cheapest AM4 B450 board but definitely not the most expensive! Very happy with my purchase.


August 2019

Best value for money, prompt delivery, CCL kind enough to update the bios for free!


August 2019

Great motherboard nice rob great delivery


May 2019

Works just fine as a motherboard, BUT there are 3 important points : 1. You MUST use header 27 for the AMD CPU fan; the location of this header is shown in the Motherboard Layout on page 1. The illustrations in the installation manual (p. 15-18) seem to indicate using header 3, but this is an RGB header, NOT for fans. 2. The MB drivers are supplied on a DVD, which is a fat lot of good if your flashy new case doesn't have a DVD drive. I tried using an external DVD drive, but the drivers didn't load on rebooting, so I copied all the files and folders from the DVD onto a USB memory stick, then plugged this into a USB 2.0 socket, and rebooted - this worked. There may be other solutions of course. 3. The RAM slots are very tight, and the slots only have release levers at one end (very mean) so it's important that the RAM boards are pressed home very firmly at the non-lever ends. I therefore recommend putting plenty of stand-offs under the RAM slots to avoid bending the MB. I haven't tried RGB, overclocking, or M.2. Very good support from ASROCK, though (