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ASRock B450M Pro4 AMD Socket AM4 Motherboard

CCL Code: MBD2471
Manufacturer Code: 90-MXB8F0-A0UAYZ
| Manufacturer: ASRock

Key Features:

  • Socket AM4
  • AMD B450 Chipset
  • 4 x SATA & 8 x USB Ports
  • DDR4 (max 64GB, 4 slots)
  • VGA, HDMI and DVI
  • mATX Form Factor

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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. SSDs are fast, but expensive, and offer minimal capacity. Mechanical hard drives boast large capacity for a low price, but are much slower than an SSD. 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: SSD responsiveness, and mechanical hard disk capacity. You can also use up to 2GB of RAM as a last-level cache for ultra-fast data.

*AMD StoreMI software is only free with 400-series chipset based motherboards.

Dual M.2 For SSD

Equipped with M.2 slot that supports both SATA3 6Gb/s and PCIe Gen3 x4 Ultra M.2 interface that pushes data transfer speeds up to 32Gb/s, and is compatible with ASRock’s U.2 Kit for installing some of the world’s fastest U.2 PCIe Gen3 x4 SSD.

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.

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.

Super Alloy Motherboard

Premium 42A Power Choke

Compared to traditional chokes, ASRock’s premium 42A power chokes effectively make the saturation current up to three times better, thus providing enhanced and improved Vcore voltage to the motherboard.

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.

Digi Power

Unlike traditional motherboards that use analog power, this motherboard uses a next generation digital PWM (Pulse-Width Modulation) design, which provides CPU Vcore voltage more efficiently and smoothly, so that the stability and lifespan of the motherboard is greatly enhanced.

ELNA Audio Caps

Who says high quality audio is only available on high-end motherboards? ASRock applied ELNA audio capacitors on mainstream and entry-level motherboards! Compared with traditional solid caps, the leakage current of ELNA audio caps is merely 3uA. This is the key to reduce noise level significantly and satisfy even the pickiest audiophiles.

Solid Capacitor Design

ASRock applied solid capacitors on this motherboard. With these solid caps, this motherboard is allowed to perform more stably and ensure longer lifetime.

3 Graphics Outputs

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

*Supported with A-Series APUs only.

Triple Monitor

Graphics, graphics and even more graphics! You've demanded for more eye candy, so this motherboard supports Triple Monitor. You may choose up to three display interfaces from the rear i/o to connect monitors and use them simultaneously without installing another graphics card.

*Supported with processors with integrated graphics only.


A-Tuning is ASRock's multi purpose software suite with a new interface, more new features and improved utilities.

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 3200+ (OC)
  • 1 PCIe 3.0 x16, 1 PCIe 2.0 x16, 1 PCIe 2.0 x1
  • AMD Quad CrossFireX™
  • Graphics Output:HDMI, DVI-D, D-Sub
  • 7.1 CH HD Audio (Realtek ALC892 Audio Codec), ELNA Audio Caps
  • 4 SATA3, 1 Ultra M.2 (PCIe Gen3 x4), 1 M.2 (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
Supported Processors Ryzen 2nd Generation
Ryzen 1st Generation
Ryzen with Vega graphics
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
HDMI Port 1 x HDMI
VGA Port 1 x D-Sub
Keyboard/Mouse Combo Port 1 x PS/2
RJ-45 Ports 1 x RJ-45
Digital Port 1 x DVI-D
Audio Line In Ports 1 x 3.5mm Jack
Audio Line Out Ports 1 x 3.5mm Jack
Microphone In Port 1 x 3.5mm Jack

Internal I/O Connectors

SATA Connectors 4 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
Serial Connectors 1 x COM
Chassis Intrusion Connector 1 x Chassis Intrusion
TPM Header 1 x TPM
Power Connector Port 1 x 20+4-pin ATX
1 x 4+4-pin ATX12V
Other Connectors 1 x M.2, M Key (Type 2242/2260/2280)
1 x M.2, M Key (Type 2230/2242/2260/2280)
1 x RGB LED header
1 x Addressable LED header
1 x AMD Fan LED header


Memory Bus Speed 3200+(OC) / 2933 / 2667 / 2400 / 2133 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 1 x PCI Express 3.0 x16
1 x PCI Express 2.0 x16
1 x PCI Express 2.0 x1

Graphics Device

Integrated Graphics Supported Yes


Integrated Sound Realtek ALC892


Warranty 3 Years


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


Software Included (may be trial or restricted) Utilities, AntiVirus Software (Trial Version), Google Chrome Browser and Toolbar
Drivers Included


Form Factor MicroATX Motherboard
In The Box Motherboard
Quick Installation Guide
Support CD
I/O Shield
2 x SATA Cables
2 x M.2 Screws
Width 244 mm
Length 244 mm

Key Features

Firewire No
Wireless Network No
Memory Channel Dual
On-board Audio Type 7.1
Number of SATA Ports 4 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 Yes
DVI Connection Yes
HDMI Connection Yes
DisplayPort Connection No
Motherboard Form Factor mATX
Motherboard Power Connectors 4 + 4-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 None
Skip Audio Test No
RGB Header Type None
Addressable RGB No

Item Details

Manufacturer ASRock
Manufacturer Code 90-MXB8F0-A0UAYZ
Alternative Part Number 90-MXBEG0-A0UAYZ
EAN 4717677336276
Condition New

Warranty Information

Warranty 3 Years

Manufacturer Information

Manufacturer ASRock
Manufacturer Code 90-MXB8F0-A0UAYZ
Questions and Answers

Do you have you a question about the ASRock B450M Pro4 AMD Socket AM4 B450 Chipset MicroATX Motherboard?

Q: Will I need to update the bios for 5600x CPU?
Answer by Website User on 27th May 2021
This will need a bios update to work with that CPU. - Kristian N
0 customers found this answer helpful.
Post Answer
Q: Will this Motherboard work with a Ryzen 5 3400G out of the box? Thanks
Answer by Website User on 16th April 2021
I can confirm this will be supported straight out of the box - Kristian N
0 customers found this answer helpful.
Post Answer
Q: Will this work out of box with a Ryzen 3200g?
Answer by Website User on 31st December 2020
yes, if you check the CPU support list on the Asrock website it says it supports ryzen 3rd gen
0 customers found this answer helpful.
Post Answer
Q: Will this support the Ryzen 3 3100 or 3300X out of the box (bios verison 3.9)? If not, can it be updated before shipping?
Answer by Website User on 29th September 2020
This may require a BIOS updated for these two CPUs - you can add the charge for the update to the basket by adding the product code SER0007. -MR
0 customers found this answer helpful.
Post Answer
Q: Will this board support the 3rd generation Ryzen CPUs with vega integrated graphics
Answer by Website User on 18th September 2020
This will support the 3200G and 3400G. -MR
0 customers found this answer helpful.
Post Answer
Q: Will this motherboard support 3rd generation Ryzen (specifically the Ryzen 7 3700x) without a bios update?
Answer by Website User on 13th July 2020
This will support 3rd Gen Ryzen out of the box. -MR
2 customers found this answer helpful.
Post Answer
Q: Hello will this support ryzen 5 3600 or will bios need to be updated. If update is needed what is the charge ?
Answer by Website User on 26th May 2020
This will support 3rd Gen Ryzen out of the box. -MR
7 customers found this answer helpful.
Post Answer
Q: Does this still require a BIOS flash or are they all updated for Ryzen 3rd Gen now?
Answer by Website User on 17th May 2020
This will support 3rd Gen Ryzen out of the box. -MR
2 customers found this answer helpful.
Post Answer
Q: Does this mobo support ryzen 3000 Cpu's (specifically the ryzen 3 3300x) out the box or is a bios update needed?
Answer by Website User on 17th May 2020
This will support them straight away. -MR
4 customers found this answer helpful.
Post Answer
Q: How do i update the bios if i dont have a 2nd or 1st gen ryzen cpu ( i want to use a ryzen 5 3600 )
Answer by Website User on 10th May 2020
You can add CCL Code: SER0007 to the basket along with the board and we will update the BIOS prior to shipping for a small fee. -MR
0 customers found this answer helpful.
Post Answer
Q: Would the 1600 AF work on this motherboard without a update
Answer by Website User on 29th April 2020
Yes, it does not require a BIOS update for this. -MR
0 customers found this answer helpful.
Post Answer
Q: ASRock B450M Pro4 AMD Socket AM4 Motherboard work with a ryzen 5 2600x
Answer by Website User on 14th April 2020
Yes, this board supports the Ryzen 5 2600X. -MR
1 customer found this answer helpful.
Post Answer
Q: Does this motherboard have enough power delivery to run the 3700x? Ive heard the VRMs are not powerful enough to deliver the right amount of power.
Answer by Matthew on 7th October 2019
It would be more than suitable for a Ryzen 7 3700X after a suitable BIOS update.
1 customer found this answer helpful.
Post Answer
Q: Does the motherboard support ryzen 3rd generation cpu's right out of the box?
Answer by Website User on 2nd August 2019
We cannot say. We would recommend contacting us for a BIOS update after you have placed your order.
2 customers found this answer helpful.
Post Answer
Q: is the RGB header 4-pin connection?
Answer by Kristian on 24th April 2019
The RGB header is 4 pin - Kristian N
0 customers found this answer helpful.
Post Answer
Q: Will the ASRock B450M Pro4 AMD Socket AM4 Motherboard ship with the bios version that allows an amd ryzen 5 1600 to be used?
Answer by Website User on 17th January 2019
Yes, it does.
0 customers found this answer helpful.
Post Answer
4.9 / 5 27 reviews


7 months ago

Was recommended by a friend and the products is doing great so far


December 2020

Great value for money


November 2020

Combined with a Ryzen 3 2200G, 400W Seasonic Platinum 400 Fanless PSU, and 32GB of RAM this has been perfect for my home server. This combo gave me 24W measured at the wall, which has more than halved my annual power consumption. There was a note on PC part picker about potential bios incompatibility with the latest Zen chips so be careful about that, but obviously didn't affect me with the Ryzen 2200G. I will be getting another.


August 2020

Product worked well and was easy to install


July 2020

No complaints whatsoever!


July 2020

Great value and shipped Ryzen 3rd Gen ready out of the box.


July 2020

Quality built motherboard, fills the gap between low and high tier for me. Great value for what you get. Looks the part too. No complaints

Tamamo-No Mipha (Miphaling)

June 2020

An excellent board with all the features I needed to futureproof my existing gaming PC. Paired with a Ryzen 5 3600. IS BIOS FLASHED FOR 3RD GEN RYZEN CPUS! :D


June 2020

lots of up-to-date ports including 4 ram slots


June 2020

Easily got a stable overclock of an R5 3600 to 4.4ghz with this board. Basic but good.


June 2020

Arrived on time in perfect condition, at a better price than other stores. Motherboard is great for a modest pc build, I paired it with a Ryzen 5 2600X, GTX 1660 Super, 16gb of RAM and a Samsung evo SSD, and it runs like a dream. Great if you're not looking for anything fancy.

Thomas King

June 2020

Perfect Motherboard for my build for a great price. I ordered quite a few of my parts from CCL as the prices are the most competitive, will order again next time I buy parts.


June 2020

Good motherboard with plenty of fan headers. Some of the instructions for placement of pins can be difficult to read Fit snuggly and no issues. Slight confusion with M.2 slots but quickly fixed - M.2 slot can get slightly hot if running with high performance GPU


May 2020

Works a treat with a Ryzen 5 3600, also has plenty of fan connections which is handy


May 2020

Lovely motherboard with overhead for upgrades, currently running a Ryzen 5 2600 and 16gb ram


May 2020

Good value board


May 2020

Good quality board, worked immediately (AMD ryzen5 2600, XFX RX580 XXX, 16Gb RAM, 256Gb SSD, 1 Tb HDD) and runs well. I'm not into overclocking, just gaming (Skyrim, COD, Red Dead 2, GTA 5, Rainbow 6 to name a few) and there's loads of USB and SATA plus some aRGB headers. Really good value for money, probably more than I needed but rather have and not need than the other way round! Great service and dlivery from CCL. Great online retailer.

Mr Joseph Clare

April 2020

good motherboard. no problems.


April 2020

Lots of connectivity. 4 RAM slots a bonus. 2 LED headers (one is addressable) for lighting strips, and the 'standard' fan header provided enough power to light a halo style 120mm chasis fan, bonus! First M2 slot can accomodate different lengths of module as standoff can be adjusted. In my opinion the headers are well placed but as I'd opted for a compact mATX case, these must be done before GPU is installed as it can severly restrict the access. I've only been runing for a few days but all seems smooth and as it should be. Very good value for money.


April 2020

Seems like a good quality product, after a week of use anyway.


April 2020

Great value option for when you just want to build your FAST computer without the need for lots of expansion.


March 2020

Everything works as expected really. Using it to house an AMD Ryzen 5 3600, 2x8GB DDR43200, and 1TB NVMe SSD. Installed into the case with no issues. The BIOS was a couple of versions behind but it flashed to the most recent with no fuss. It recognised the CPU out of the box. For some reason the RAM was detected at a slower speed and had to be manually set, but once set to 3200 it was perfect - completed memtest with no issues and been stable for a few weeks, running Ubuntu 16.04.4. One caveat: the second SSD slot will only accept SATA drives, it won't recognise M.2 NVMe. I think this is mentioned in the specs but it wouldn't recognise the WDS100T2B0C that I tried to install in it.

Joseph Smith

February 2020

Great value


October 2019

Brill. Using with a ryzen 7


September 2019

Very decent motherboard. Plenty of features for the price. Lots of connectivity, fan headers etc...


July 2019

Good vrms for overclocking

William Lam

June 2019

One of the best in its class. The cheapest I could find anywhere. Quick shipment. Very happy indeed.