MSI B550-A PRO AM4 ATX Motherboard

BH #MSB550APRO • MFR #B550APRO
MSI B550-A PRO AM4 ATX Motherboard
Key Features
  • ATX Form Factor
  • AMD B550 Chipset
  • Socket AM4
  • 4 x Dual-Channel DDR4-4400 (OC)
Focus on business programs and optimize your workflow with the B550-A PRO ATX Motherboard from MSI. Designed to streamline assembly time, MSI allows you to focus on components that will enhance workload efficiency. The B550-A Pro is ideal for the DIY users who wish to replace older out-of-date motherboards or enjoy building from scratch.
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$139.99
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MSI B550-A PRO Overview

  • 1Description
  • 2User Friendly Design
  • 3Enhanced Performance
  • 4MSI Dragon Center
  • 5BIOS 5

Focus on business programs and optimize your workflow with the B550-A PRO ATX Motherboard from MSI. Designed to streamline assembly time, MSI allows you to focus on components that will enhance workload efficiency. The B550-A Pro is ideal for the DIY users who wish to replace older out-of-date motherboards or enjoy building from scratch.

Based upon AMD B550 chipset architecture, the B550-A Pro's AM4 socket allows you to install Ryzen 5000, 3000, and Ryzen 4000 G-series processors. Four dual-channel memory slots allow you to take advantage of DDR4 memory modules with speeds up to 4400 MHz. You can connect several hard drives with six SATA III and two M.2 ports for enhanced program loading and increasing overall performance. Install graphics, sound, or networking cards with one PCIe 4.0 x16, one PCIe 3.0 x16, and two PCIe 3.0 x1 slots. An RJ45 port is also available for wired internet connectivity, and with 7.1-channel high-definition audio, you can experience a wide range of entertainment. This motherboard is only compatible with Windows 10 (64-bit) operating systems.

User Friendly Design
Whether you are a seasoned or amateur builder, the B550-A Pro is designed for simplicity and durability, giving you all the tools you need to put together a PC optimized for your business level needs. Steel armor PCIe slots are reinforced with heavy soldered connections to prevent bending along with an XL clip for easy device swapping. Double ESD protection prevents shorts by adding another grounding layer to mounting holes. Additionally, an EZ debug LED system tells you if components are experiencing any issues, reducing time spent on troubleshooting.
Enhanced Performance
MSI constructed the B550-A Pro with enhanced features to increase system performance. The foundation of this board is built on 2oz thickened copper printed circuits for increased durability and conductivity between components. Extended heatsink design and M.2 Shield Frozr technology keeps your high-end components safe from damage caused by excessive heat. Core Boost, DDR4 Boost, Digital PWM, and Lightning Gen 4 all work together to provide better stability during increased workloads while also maximizing transfer-speed bandwidth. Enrich your media experience with MSI's Audio Boost and 4K support, providing clear visuals and crisp sound.
MSI Dragon Center
Take control of advanced motherboard features directly from your dashboard with MSI's free Dragon Center software. Giving you total fan control, overclock settings, and hardware monitoring, you can fine-tune your experience depending on your needs. You can also set up specific user scenarios, automatic live updates, and adjust monitor settings for customizable brightness and color adjusting.
BIOS 5
BIOS 5 allows you to dive deeper into hardware settings, enabling CPU and memory overclocking, BIOS flashing, and real-time hardware monitoring in both an easy and advanced mode for seasoned technical users.
UPC: 824142219362

MSI B550-A PRO Specs

CPU
ChipsetAMD B550
CPU SocketAM4
Back Panel I/O
USB2 x USB-A (USB 2.0)
2 x USB-A (USB 3.0 / 3.1/3.2 Gen 1)
1 x USB-A (USB 3.1/3.2 Gen 2)
1 x USB-C (USB 3.1/3.2 Gen 2)
ThunderboltNone
Display1 x DisplayPort
1 x HDMI 2.1
Audio5 x 1/8" / 3.5 mm
1 x S/PDIF
Ethernet / Controller1
PS/21 x PS/2
ButtonsBIOS Flashback
Memory
Memory Slots4 x 288-Pin
Memory SupportDDR4 1866, 2133, 2400, 2667, 2800, 2933, 3000, 3066, 3200, 3466, 3600, 3733, 3866, 4000, 4133, 4266, 4400 MHz
Maximum Capacity128 GB
Channel ArchitectureDual Channel
ECC SupportNon-ECC, ECC Unbuffered
Storage Expansion
SATA6 x SATA III
M.21 x M Key 2242, 2260, 2280, 22110 (PCIe 4.0 x4, PCIe 3.0 x4)
1 x M Key 2242, 2260, 2280 (PCIe 3.0 x4)
U.2None
RAID SupportRAID 0, 1, 10 (SATA)
RAID 0, 1 (M.2)
Internal I/O
Expansion Slots1 x PCIe 4.0 x16
1 x PCIe 3.0 x16
2 x PCIe 3.0 x1
USB2 x 2.0 Header (Supports 4 USB-A Port)
1 x 3.0 / 3.1/3.2 Gen 1 Header (Supports 1 USB-C Port)
1 x 3.0 / 3.1/3.2 Gen 1 Header (Supports 2 USB-A Port)
Multi-GPU Support2-Way AMD CrossFireX
Air Cooling1 x 4-Pin CPU
6 x 4-Pin System
Liquid Cooling1 x 4-Pin Pump
Power Connectors1 x 24-Pin Mainboard
1 x 8-Pin ATX
SecurityChassis Intrusion, TPM Module
LED Header3 x RGB
Audio1 x Speaker
DiagnosticsClear CMOS
Front Panel I/O
I/O Connection HeadersUSB 3.0 / 3.1/3.2 Gen 1
Audio
Audio CodecRealtek ALC892/ALC897 (7.1-Channel)
Wireless
BluetoothNone
Wi-FiNone
Software
OS CompatibilityWindows 10
*As of January, 2021: Check with manufacturer for the most up-to-date compatibility
Physical
Form FactorATX
Dimensions9.6 x 12" / 24.4 x 30.5 cm
Packaging Info
Package Weight3.555 lb
Box Dimensions (LxWxH)13.6 x 10.8 x 3.45"

MSI B550-A PRO Reviews

Total garbage

By brandon
Rated 1 out of 5
Date: 2022-12-10

Do not buy this board. After awhile using the B550-A and today either reconnect to wifi BSODs or USB devices crashes and or BSODs to DPC_WATCHDOG_VIOLATION

Good Motherboard.

By Matthew
Rated 5 out of 5
Date: 2022-04-04

I'm no expert, but it does what it's supposed to do, Has USB-C header and isn't flashy or goofy. Needed to use flashback button for 5000 series (Ryzen 5600G) but was not an pleasant experience. Didn't come with a physical manual other than the quick start guide so I just pulled it up from MSI's website. Be sure to read about the PCIe lanes. Was planning on using 2 m.2 NVMe drives but thankfully I realized it would not be optimal if we install a discreet GPU (at a later date) while using the 2nd m.2 slot. Be carful getting the I/O tabs just right while installing motherboard into case. Only one side of the memory slots have moving tabs that snap into place. It's not as fancy as other boards, but it isn't really supposed to be. I would not hesitate to use again. Actually, I plan to.

Amazing motherboard!

By Matt
Rated 5 out of 5
Date: 2022-01-31

Great Motherboard for the price! there is a hug IO, with lots of ports, and no latency when playing vr connected to IO. It is a bit big, so take that into consideration when buying. Will fit most medium cases though. Would buy again!

USB interface is buggy

By Erin
Rated 2 out of 5
Date: 2021-07-07

The motherboard seems fine and works but sometimes the USB devices take a few minutes after windows has booted to be recognized. You have to pug and unplug if you dont want to wait. Also tried to install another M2 NVME ssd, but there was no screw for the second M2 slot.

Excellent product

By Ian
Rated 5 out of 5
Date: 2021-07-01

Works great, easy to install everything. BIOS is easy to update if you have a zip drive and find a good youtube video.

Idk what the issue is

By Aalaiah
Rated 3 out of 5
Date: 2021-04-27

I seem to get this issue of my cooler and usb disconnecting and reconnecting rapidly and this seems to happen quite often and is especially irritating.

Poor experience

By Adam
Rated 1 out of 5
Date: 2022-10-19

Box arrived odorous, with some visible moist spots. Board would not boot, despite trying multiple chips and bios versions. I believe it was DOA.

Seems ok, but there's a BIOS issue

By Donald
Rated 3 out of 5
Date: 2022-09-12

You would think that when you buy a motherboard with an AM4 socket and you populate it with an AM4 processor, the two would work nicely together. Not true in the case of this board. I ordered this board and an AMD Ryzen 5600G (plus memory and an SSD) from B&H to upgrade a PC I built 11 years ago. Didn't work -- the board did not see the processor (an LED came on to that effect). Thinking either the processor or the board was bad, I sent everything back to B&H. Still curious about what happened, I continued to search the network for answers and finally got one -- the 5600G is significantly newer than this board and the some of the older copies of the board, which B&H seems to have, require a BIOS update. I confirmed this with MSI customer service. So how do you update the BIOS without a working processor? This board can do it -- it's in the manual. So since the board is well rated and cost effective (I am decidedly NOT a gamer), I ordered a second copy (which MSI told me required a BIOS update per the serial number) plus a 5600g and the other parts. I did the BIOS update per the manual and I am typing this message on the upgraded machine, running FreeBSD. If anyone from B&H is reading this, I would suggest that you describe the potential for this problem in the overview of this board. It can't be good for business to have people thinking, as I did, that when an AM4 board and an AM4 processor won't work together, one of them is bad and so everything comes back.

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YOUR RECENTLY VIEWED ITEMS

How many usb 2.0 ports can I put on it?

How many usb 2.0 ports can I put on it?
Asked by: Thomas
If you used both Pcie 4x slots, so you could do 4 USB 2.0 per each 4x slot.
Answered by: Nachmen
Date published: 2020-10-13

The picture for IO shield makes it seems like it ...

The picture for IO shield makes it seems like it only covers the ports and not the entire portion, does it cover everything?
Asked by: Mohammad
No, unfortunately this model leaves some parts of the IO exposed.
Answered by: dariusb
Date published: 2021-03-18

Does this have molenex connectors for the fans i ...

Does this have molenex connectors for the fans i want to buy?
Asked by: Cash
This has 6 4-pin system fan connectors.
Answered by: Bennie
Date published: 2020-07-30

Will it be updated to the latest bios? because ...

Will it be updated to the latest bios? because the cpu I am going to get with it won't work unless the bios is updated
Asked by: Bryce
The MSI B550-A PRO AM4 ATX Motherboard will ship with the newest bios at point of production.
Answered by: dariusb
Date published: 2022-07-17

The picture for IO shield makes it look like it ...

The picture for IO shield makes it look like it just covers the ports? Just want to make sure it's a full IO shield?
Asked by: Mohammad
Yes, the MSI B550-A PRO AM4 ATX Motherboard BH #MSB550APRO comes with a full I/O shield.
Answered by: Miguel
Date published: 2021-03-18

Does it support Ryzen 5000 out of the box?

Does it support Ryzen 5000 out of the box?
Asked by: Matthew
It will not support a Ryzen 5000 out of the box unless it was stickered as 5000 ready.
Answered by: Reuben
Date published: 2021-10-08

does this board have a D-RGB Header?

does this board have a D-RGB Header?
Asked by: rob
Yes, this motherboard has D-RGB header.
Answered by: Daniel
Date published: 2020-08-28

Does this have on-board RGB lighting?

Does this have on-board RGB lighting?
Asked by: Juliana
This model doesn't support RGB.
Answered by: Bennie
Date published: 2020-07-22
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