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ASRock B550M PRO4 AM4 Micro ATX AMD Motherboard

★★★★★
(542 customer reviews)

Original price was: $114.99.Current price is: $89.00.

You Save $25.99 (23%)
Last updated on September 28, 2026 11:29 AM
SKU: N82E16813157939 Category: Tag:

B550M Pro4
  • 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.

*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.

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.
*Wi-Fi module is not included.

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.

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.

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.

3 Graphics Outputs

Complete with all three types of most used connectors! Packed with a D-Sub + DisplayPort + HDMI combo. Plus the HDMI port supports 4K resolution.

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.

Specification: ASRock B550M PRO4 AM4 Micro ATX AMD Motherboard

Best Seller Ranking

#9 in AMD Motherboards

Brand

Model

CPU Socket Type

AM4

CPU Type

Supports AMD Ryzen 5000 Series, 5000 G-Series, 4000 G-Series, 3000 Series, 3000 G-Series Processors** Not compatible with AMD Athlon Processors.* BIOS update might require for AMD Zen 3 Ryzen 5000 Series CPU. Refer to ASRock website for CPU support list.

Chipset

AMD B550

Number of Memory Slots

4x288pin (DDR4)

Memory Standard

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 (AMD Ryzen series APUs (Cezanne & Renoir))*DDR4 4533+(OC), 2133 (AMD Ryzen series CPUs (Vermeer & Matisse))*DDR4 3333+(OC), 3200(OC), 2133 (AMD Ryzen series APUs (Picasso))** For Ryzen Series APUs (Picasso, Cezanne and Renoir), ECC is only supported with PRO CPUs.

Maximum Memory Supported

128GB

Channel Supported

Dual Channel

ECC Supported

ECC supported varies by processors

Buffer Supported

Un-buffered

PCI Express 4.0 x16

1 x PCI Express 4.0 x16** Supports NVMe SSD as boot disks.* Actual support may vary by CPU.

PCI Express 3.0 x16

1 x PCI Express 3.0 x16** Supports NVMe SSD as boot disks.

PCI Express x1

1 x PCI Express 3.0 x1

Other Slots

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

Serial ATA SATA

6 x SATA3 6.0Gb/s** M2_2 and SATA3_5_6 share lanes. If either one of them is in use, the other one will be disabled.

M.2

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)** Supports NVMe SSD as boot disks.* Supports ASRock U.2 Kit.

SATA RAID

0/1/10

Onboard Video Chipset

Supported only by CPU with integrated graphic

Audio Chipset

Realtek ALC1200

Audio Channels

7.1 Channels

LAN Chipset

Realtek RTL8111H

Max LAN Speed

1Gbps

Back I/O Ports

Antenna Bracket1 x PS/2 Mouse/Keyboard Port1 x D-Sub Port1 x HDMI Port1 x DisplayPort 1.41 x USB 3.2 Gen2 Type-A Port (10Gb/s) (Supports ESD Protection)1 x USB 3.2 Gen2 Type-C Port (10Gb/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)HD Audio Jacks: Line in, Front Speaker, Microphone

Onboard USB

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)

Other Connectors

1 x COM Port Header1 x SPI TPM Header1 x Power LED and Speaker Header2 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)4 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan Speed Control)****1 x Front Panel Audio Connector* Support in total up to 12V/3A, 36W LED Strip.** Support in total up to 5V/3A, 15W LED Strip.*** The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power.**** 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.

Form Factor

LED Lighting

RGB

Dimensions W x L

9.6" x 9.6"

Power Pin

1 x 24-pin ATX Power Connector1 x 8-pin 12V Power Connector

Windows 11

Supported

Features

Unique Feature:ASRock USB 3.2 Gen2- ASRock USB 3.2 Gen2 Type-A Port (10Gb/s)- ASRock USB 3.2 Gen2 Type-C Port (10Gb/s)ASRock Super Alloy- XXL Aluminum Alloy Heatsink- Premium 50A Power Choke- Sapphire Black PCB- High Density Glass Fabric PCB- 2oz Copper PCBASRock Steel Slot Gen4ASRock Full Coverage M.2 HeatsinkASRock Hyper M.2 (PCIe Gen4x4)ASRock POST Status Checker (PSC)ASRock Full Spike Protection (for all USB, Audio, LAN Ports)ASRock Live Update & APP ShopBIOS:- 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, 1.05V_PROM_S5, 2.5V_PROM, +1.8VSB, VDDP Voltage Multi-adjustmentSoftware and UEFI:Software- ASRock Motherboard Utility (A-Tuning)- ASRock XFast LANUEFI- 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 ToolbarHardware Monitor:- Temperature Sensing: CPU, CPU/Water Pump, Chassis/Water Pump Fans- Fan Tachometer: CPU, Chassis/Water Pump Fans- Quiet Fan (Auto adjust chassis fan speed by CPU temperature): CPU, Chassis/Water Pump Fans- Fan Multi-Speed Control: CPU, Chassis/Water Pump Fans- Voltage monitoring: +12V, +5V, +3.3V, CPU Vcore, +1.8V, VDDPOS:- Microsoft Windows 10 64-bit, 11 64-bitCertifications:- FCC, CE- ErP/EuP ready (ErP/EuP ready power supply is required)

Package Contents

Accessories:Quick Installation Guide, Support CD, I/O Shield2 x SATA Data Cables2 x Screws for M.2 Sockets

First Listed on Newegg

June 12, 2020

542 reviews for ASRock B550M PRO4 AM4 Micro ATX AMD Motherboard

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