Asrock · MPN: 90-MXBDK0-A0UAYZ
£90.99
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Key specs

  • Maximum resolution5120 x 2880 pixels
  • Weight465 g
All specifications

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Price drop alert

Asrock B550M Pro4 AMD B550 Socket AM4 micro ATX
Now £90.99

We'll email you if the price of this item drops in the next 90 days.

Overview

  • Supports 3rd Gen AMD AM4 Ryzen™ / Future AMD Ryzen™ Processors
  • 8 Power Phase Design, Digi Power
  • Supports DDR4 4733+ (OC)
  • 1 PCIe 4.0 x16, 1 PCIe 3.0 x16, 1 PCIe 3.0 x1, 1 M.2 Key E for WiFi
  • Graphics Output Options: HDMI, DisplayPort, D-Sub
  • AMD CrossFireX™
  • 7.1 CH HD Audio (Realtek ALC1200 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), 8 USB 3.2 Gen1 (4 Front, 4 Rear)
  • Realtek Gigabit LAN

IT’S TIME FOR B550 MOTHERBOARDS
Everything You Need For Computing

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.

8 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.

Premium 50A Power Choke
Compared to traditional chokes, ASRock’s premium 50A power chokes effectively make the saturation current up to three times better, thus providing enhanced and improved Vcore voltage to the motherboard.

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
This motherboard features onboard RGB headers and an addressable RGB header that allow motherboard to be connected to compatible LED devices such as strip, CPU fans, coolers, chassis and so on. Users may also synchronize RGB LED devices across the Polychrome RGB Sync-certified accessories to create their own unique lighting effects.

A SOLID M.2-SOLUTION PERFORMER
Dual M.2 For SSD, Supports Type 22110 M.2
Ready for higher capacity and even faster Type 22110 M.2 NVMe SSD to fulfill the need of performance. Hyper M.2 socket that supports PCIe Gen4 x4 while M.2 socket is capable of running PCIe Gen3 x2 and SATA3 mode.
M.2 Armors
Good M.2 SSD protection is important for longevity and stability. ASRock provides a completed M.2 armor solution that makes SSDs to run in a certain low temperature.

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.

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.

Post Status Checker
An easy troubleshooting tool that shows the CPU / DRAM / VGA / BOOT operation every time you start up the system. Post Status Checker is an fast and easy way to identify the source of the problem.

Specifications

Processor

Supported processor socketsSocket AM4
Maximum number of SMP processors1
Compatible processor seriesAMD Ryzen 3000 Series
Processor socketSocket AM4
Processor manufacturerAMD

Memory

Unbuffered memoryYes
Supported memory module capacities4GB, 8GB, 16GB, 32GB
Maximum internal memory128 GB
Supported memory clock speed (max)4733 MHz
Supported memory clock speeds2133,2400,2667,2933,3200,3466,3600,3733,3800,3866,4000,4133,4200,4266,4333,4400,4466,4533,4600,4666,4733 MHz
ECC сompatibilityECC & Non-ECC
Memory channelsDual-channel
Memory slots typeDIMM
Number of memory slots4
Supported memory typesDDR4-SDRAM
Show all 77 specificationsShow fewer specifications

Storage controllers

RAID levels0, 1, 10
RAID supportYes
Supported storage drive interfacesM.2, SATA III
Supported storage drive typesHDD & SSD

Graphics

Number of displays supported3
DirectX version12.0
HDCPYes
Maximum resolution5120 x 2880 pixels
Parallel processing technology supportCrossFireX, Quad-GPU CrossFireX

Internal I/O

RGB LED pin headerYes
Number of COM connectors1
TPM connectorYes
12V power connectorYes
EPS power connector (8-pin)Yes
Number of chassis fan connectors4
CPU fan connectorYes
ATX Power connector (24-pin)Yes
Front panel connectorYes
Front panel audio connectorYes
Number of SATA II connectors6
USB 3.2 Gen 1 (3.1 Gen 1) connectors2
USB 2.0 connectors2

Rear panel I/O ports

Microphone inYes
DisplayPort version1.4
DisplayPorts quantity1
HDMI version2.1
HDMI ports quantity1
VGA (D-Sub) ports quantity1
PS/2 ports quantity1
Ethernet LAN (RJ-45) ports1
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity1
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity1
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity4
USB 2.0 ports quantity2

Network

Wi-FiNo
Wake-on-LAN readyYes
LAN controllerRealtek RTL8111H
Ethernet interface typeGigabit Ethernet
Ethernet LANYes

Features

CertificationFCC, CEErP/EuP ready (ErP/EuP ready power supply is required)
Windows operating systems supportedWindows 10 x64, Windows 11 x64
PC health monitoringCPU, Fan, Temperature, Voltage
Audio output channels7.1 channels
Audio chipRealtek ALC1200
Motherboard chipsetAMD B550
Motherboard chipset familyAMD
Motherboard form factormicro ATX
Component forPC

Expansion slots

Number of M.2 (M) slots3
PCI Express x16 (Gen 3.x) slots1
PCI Express x16 (Gen 4.x) slots1
PCI Express x1 (Gen 3.x) slots1

BIOS

System Management BIOS (SMBIOS) version2.3
ACPI version5.1
BIOS memory size256 Mbit
BIOS typeUEFI AMI

Weight & dimensions

Height70 mm
Depth244 mm
Width244 mm

Packaging content

Drivers includedYes
Cables includedSATA

Other features

Weight465 g

Manuals & downloads

Delivery & returns

Delivery

  • FREE standard delivery on orders over £50, otherwise £4.95 (3–5 working days).
  • Express delivery £9.99 (1–3 working days) on selected products, UK mainland.
  • PlayStation and Arozzi products use a 5–7 working-day service.
  • Orders are processed within 24 hours, Monday to Friday excluding bank holidays. All deliveries must be signed for.

Returns

  • Changed your mind? Tell us within 14 days of receiving your item, then return it within a further 14 days, unused and in its original packaging. A minimum £9.99 collection fee applies.
  • Faulty or damaged on arrival? Contact us within 48 hours of delivery.
  • Custom-built PCs can only be returned if faulty. Opened headphones, earphones and AirPods can't be returned for hygiene reasons.

Full delivery information · Full returns policy