ASRock B550M Pro4 Desktop Motherboard - AMD Chipset - Socket AM4


Availability : In Stock



ASRock B550M Pro4 Desktop Motherboard - AMD Chipset - Socket AM4 - Micro ATX - 128 GB DDR4 SDRAM Maximum RAM - DIMM, UDIMM - 4 x Memory Slots - Gigabit Ethernet - HDMI - DisplayPort - 6 x SATA Interfaces

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 the most extreme memory performance!


Audio Channels 7.1
Network & Communication
Gigabit Ethernet Yes
Onboard Video CPU Dependent Video
Physical Characteristics
Form Factor Micro ATX
Width 243.8 mm
Depth 243.8 mm
I/O Expansions
Number of PCI Express x1 Slots 1
Number of Total Expansion Slots 3
Number of PCI Express x16 Slots 2
Total Number of PCI Express Slots 3
I/O Controller
RAID Levels 1
Controller Type Serial ATA/600
RAID Supported Yes
Maximum Memory Supported 128 GB
Memory Technology DDR4 SDRAM
Number of Memory Slots 4
Memory Form Factor UDIMM
Memory Speed Supported 4600 MHz (O.C.)
3466 MHz (O.C.)
3733 MHz (O.C.)
2667 MHz
4733 MHz (O.C.)
4466 MHz (O.C.)
4400 MHz (O.C.)
4200 MHz (O.C.)
4666 MHz (O.C.)
4000 MHz (O.C.)
2133 MHz
3800 MHz (O.C.)
2933 MHz
4533 MHz (O.C.)
3600 MHz (O.C.)
4133 MHz (O.C.)
4333 MHz (O.C.)
3866 MHz (O.C.)
2400 MHz
4266 MHz (O.C.)
3200 MHz
Onboard Interfaces
Number of SATA Interfaces 6
Total Number of Onboard USB Ports 8
Number of Onboard USB 2.0 Ports 4
Number of M.2 Interfaces 3
Number of Onboard USB 3.2 Ports 4
Number of Network (RJ-45) Ports 1
DisplayPort Yes
Total Number of USB Ports 8
Number of USB 2.0 Ports 2
Number of USB 3.2 Ports 6
Package Contents
  • B550M Pro4 Desktop Motherboard
  • Quick Installation Guide
  • Support CD
  • I/O Shield
  • 2 x SATA Data Cables
  • 2 x Screws for M.2 Sockets
Environmentally Friendly Yes
Environmental Certification China RoHS
ErP/EuP Ready
Brand Compatibility AMD
General Information
Product Type Desktop Motherboard
Manufacturer Part Number B550M PRO4
Manufacturer Website Address
Manufacturer ASRock, Inc
Product Model B550M Pro4
Product Name B550M Pro4 Desktop Motherboard
Product Series PRO
Brand Name ASRock
Processor & Chipset
Processor Supported Ryzen 5 Pro
Ryzen 5
Ryzen 7 PRO
Ryzen 9
Ryzen 7
Ryzen 3 PRO
Ryzen 3
Total Processor Supported 1
Processor Socket Socket AM4
Chipset Manufacturer AMD


Our hardware comes with a 1-year warranty and we will be glad to provide a replacement/refund if the device is deemed faulty.

  • We accept return of an item within 7 business days from delivery. To be eligible for this, returned item must be unused and in the same condition as you receive it. Ensure it is returned in its original packaging. Processing of refund will be attended to after item has been received. This may take 5-10 business days depending on your location. 

  • All items purchased will have 12-month hardware warranty.  

  • All items that will be returned will have a Restocking Fee of 10% depending on the item condition. 
  • If you encounter any problem with the item, contact our support hotline right away to assist you of your concern.  

  • For defective items, our warehouse team will be the one to validate whether the item is indeed defective. 
  • We offer warranty repair. Warranty varies depending on the product indicated on the advertisement. Please pay attention as warranty can be 12-months, 36-months and 60-months. If the item cannot be repaired and is within warranty period, we will offer item replacement provided item is still available. 
  • All shipping costs to and from our warehouse will be shouldered by AVH direct.