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MSI B550-A PRO ProSeries Motherboard (AMD AM4, DDR4, PCIe 4.0, SATA 6Gb/s, M.2, USB 3.2 Gen 2, HDMI/DP, ATX)

4.6 4.6 out of 5 stars 2,825 ratings
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MSI B550-A PRO ProSeries Motherboard

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About this item

  • Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update.Audio ports (Rear) : Realtek ALC892/ALC897 Codec
  • Supports dual channel DDR4 memory up to 128 GB (4400 MHz)
  • Lightning Fast Game experience: PCIe 4.0, Lightning Gen 4 M.2 with M.2 Shield Frozr, AMD Turbo USB 3.2 GEN 2
  • Core Boost technology combines optimized power circuit layouts and digital power regulation which allows for precise and steady current delivery to the CPU
  • AUDIO BOOST rewards your ears with studio grade sound quality for immersive gaming experiences
  • Premium Thermal Solution: Heatsink thermal pad rated for 7W/mk and PCB with 2oz thickened copper
  • Flash BIOS Button lets users flash the BIOS even without a CPU or memory
  • Powerful Design: Core Boost, Digital PWM IC, 2oz Thickened Copper PCB, Creator Genie, DDR4 Boost
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MSI B550-A PRO ProSeries Motherboard (AMD AM4, DDR4, PCIe 4.0, SATA 6Gb/s, M.2, USB 3.2 Gen 2, HDMI/DP, ATX)
MSI B550-A PRO ProSeries Motherboard (AMD AM4, DDR4, PCIe 4.0, SATA 6Gb/s, M.2, USB 3.2 Gen 2, HDMI/DP, ATX)
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Price-8% $109.99
List:$119.99
-8% $109.99
List:$119.99
-31% $89.99
List:$129.99
-30% $108.13
New Price:$154.99
-17% $99.99
List:$119.99
-6% $169.99
List:$179.99
Delivery
Get it as soon as Tuesday, Mar 26
Get it as soon as Tuesday, Mar 26
Get it Mar 26 - 28
Get it as soon as Tuesday, Mar 26
Get it as soon as Tuesday, Mar 26
Customer Ratings
Stability
4.3
3.5
3.8
4.1
3.7
4.6
For gaming
4.2
3.9
3.8
4.0
3.9
4.7
Tech Support
3.8
3.5
3.4
3.6
3.6
4.4
Value for money
4.1
3.8
3.7
3.9
4.0
Easy to install
4.3
4.1
3.9
Sold By
Amazon.com
Amazon.com
Amazon.com
BeachAudio
Amazon.com
Amazon.com
platform
windows 10
windows 10
windows 10
windows 10
windows 10
windows 11
cpu socket
Socket AM4
Socket AM4
Socket AM4
Socket AM4
Socket AM4
Socket AM4
memory slots
4
4
4
4
4
4
memory capacity
128 GB
128 GB
128 GB
128 GB
128 GB
128 GB
compatible processors
RYZEN 9
AMD 2nd Gerenration Ryzen
AMD 3rd Generation Ryzen
AMD 3rd Generation Ryzen
AMD Ryzen 5000 Series, 5000-G Series, 4000-G Series and 3000 Series
card interface
pci e
pci e
pci e
pci e
pci e
pci e

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Product Description

Powered by AMD Ryzen AM4 processors, the MSI B550-A PRO combines stable functionality and high-quality assembly to solve professional workflows. Extended Heatsink Design and Core boost keep critical components operating reliably. PCIe 4.0 slots and M.2 with Shield Frozr provides the latest in device connectivity.

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Technical Details

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Additional Information

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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MSI

MSI B550-A PRO ProSeries Motherboard (AMD AM4, DDR4, PCIe 4.0, SATA 6Gb/s, M.2, USB 3.2 Gen 2, HDMI/DP, ATX)


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Product guides and documents


From the manufacturer

msi b550-a pro

msi gaming

MSI is the most trusted name in gaming and eSports. We’ve dedicated countless hours and committed numerous resources to support the world’s most aspiring and best gamers and use their knowledge and expertise in our products in return. MSI integrated all gamer’s aspirational functions in its gaming rigs and pushing the performance beyond limits.

B550-A PRO

Advancing Ascension

Powered by AMD Ryzen AM4 processors, the MSI B550-A PRO combines stable functionality and high-quality assembly to solve professional workflows. Extended Heatsink Design and Core boost keep critical components operating reliably. PCIe 4.0 slots and M.2 with Shield Frozr provides the latest in device connectivity.

  • Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update
  • Supports dual channel DDR4 memory up to 128 GB (4400 MHz)
  • Lightning Fast Game experience: PCIe 4.0, Lightning Gen 4 M.2 with M.2 Shield Frozr, AMD Turbo USB 3.2 GEN 2
  • Core Boost technology combines optimized power circuit layouts and digital power regulation which allows for precise and steady current delivery to the CPU
  • AUDIO BOOST rewards your ears with studio grade sound quality for immersive gaming experiences
  • Premium Thermal Solution: Heatsink thermal pad rated for 7W/mk and PCB with 2oz thickened copper
  • Flash BIOS Button lets users flash the BIOS even without a CPU or memory

msi lightning gen 4 pci-e

msi extended heatsink

msi core boost

LIGHTNING GEN 4 SOLUTION

Strike fast with MSI Lightning Gen 4 PCI-E. Attach ultra fast PCI-E 4.0 devices and enjoy up to 64GB/s unidirectional transfer bandwidth.

EXTENDED HEATSINK

An all-metal extended heatsink enlarges the heat dissipation surface allowing the CPU power system to reliably drive even high-end processors.

CORE BOOST

Core Boost combines a reserved zone of optimized circuits and premium power delivery components to create a highly efficient power system capable of precise current output to the CPU.

msi pcb 2oz thickened copper

msi atypical edge

msi pci-e steel armor

PCB WITH 2OZ THICKENED COPPER

An enhanced PCB material design with 2oz thickened copper increases conductivity, improving heat dissipation and high-performance reliability.

EASY TO ARRANGE YOUR CABLES

Tuck away SATA and USB cables neatly with MSI Atypical PCB edge.

FORTIFY WITH PCI-E STEEL ARMOR

MSI PCI Express Steel Armor slots are secured to the motherboard with extra solder points and support the weight of heavy graphics cards. When every advantage in games counts, Steel Armor shields the point of contact from electromagnetic interference.

mag b550 tomahawk msi mag bb50m mortar wifi msi mag b550m mortar msi mag b550m bazooka msi b550-a pro msi b550m pro-vdh wifi
MAG B550 TOMAHAWK MAG B550M MORTAR WIFI MAG B550M MORTAR MAG B550M BAZOOKA B550-A PRO B550M PRO-VDH WIFI
Customer Reviews
4.7 out of 5 stars
5,232
4.4 out of 5 stars
470
4.5 out of 5 stars
433
4.4 out of 5 stars
396
4.6 out of 5 stars
2,825
4.5 out of 5 stars
3,428
CPU Support Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update
Chipset / Socket AMD B550 / AM4 AMD B550 / AM4 AMD B550 / AM4 AMD B550 / AM4 AMD B550 / AM4 AMD B550 / AM4
DDR4 Memory Support 4 x DIMM; Max. 128GB DDR4; 4866+ MHz 4 x DIMM; Max. 128GB DDR4; 4400+ MHz 4 x DIMM; Max. 128GB DDR4; 4400+ MHz 4 x DIMM; Max. 128GB DDR4; 4400+ MHz 4 x DIMM; Max. 128GB DDR4; 4400+ MHz 4 x DIMM; Max. 128GB DDR4; 4400+ MHz
PCIe x16 Slots 1x PCIe 4.0 x16 slots (x16); 1x PCIe 3.0 x16 slots (x4); 2x PCIe 3.0 x1 slots 1x PCIe 4.0 x16 slots (x16); 1x PCIe 3.0 x16 slots (x4); 2x PCIe 3.0 x1 slots 1x PCIe 4.0 x16 slots (x16); 1x PCIe 3.0 x16 slots (x4); 2x PCIe 3.0 x1 slots 1x PCIe 4.0 x16 slots (x16); 2x PCIe 3.0 x1 slots 1x PCIe 4.0 x16 slot (x16 / x4); 1x PCIe 3.0 x16 slot (x4); 2x PCIe 3.0 x1 slots 1x PCIe 4.0 x16 slots (x16); 2x PCIe 3.0 x1 slots
Display Output HDMI, DisplayPort (requires processor graphics) HDMI, DisplayPort (requires processor graphics) HDMI, DisplayPort (requires processor graphics) HDMI, DisplayPort (requires processor graphics) HDMI, DisplayPort (requires processor graphics) HDMI, DisplayPort, VGA (requires processor graphics)
M.2 2x M.2 2x M.2 2x M.2 2x M.2 2x M.2 2x M.2
Wireless n/a 2x2 Wi-Fi with MU-MIMO 802.11 a/b/g/n/ac/ax n/a n/a n/a 1x1 Wi-Fi 802.11 a/b/g/n/ac
Ethernet LAN 2.5G LAN & Gigabit LAN 2.5G LAN 2.5G LAN Gigabit LAN Gigabit LAN Gigabit LAN
Mystic Light 16.8 million colors n/a n/a n/a n/a n/a
Form Factor ATX Micro-ATX Micro-ATX Micro-ATX ATX Micro-ATX

Customer reviews

4.6 out of 5 stars
4.6 out of 5
2,825 global ratings

Customers say

Customers like the ease of installation, value, and quality of the motherboard. For example, they mention it's easy to build a PC with, has a simple BIOS update procedure, and is good value for the money. That said, opinions are mixed on performance and features.

AI-generated from the text of customer reviews

88 customers mention63 positive25 negative

Customers like the quality of the motherboard. They say it has a good finish, and the VRMs are heatsinked. Customers also say it's well-built, and has s a really nice bios. They also mention that it'll make a great PC.

"Absolutely impressive build quality and preformance for the money... 500 dollar AMD R5 build on a 8gb 5500xt, 32gb ddr4 with this board was a easy..." Read more

"...Windows 11 Pro and my application/utility suites, the system has been stable through some very heavy use: transcoding videos with CPU and GPU using..." Read more

"...though I wish the I/O shield was integrated because the one included is flimsy and rather difficult to put in..." Read more

"...MSI is a good brand and also a good bargain compared to some of the others offering much less in features...." Read more

35 customers mention33 positive2 negative

Customers appreciate the value of the motherboard. They say it has features beyond its price, including USB-C. Some say it's one of the cheapest boards they could find.

"Absolutely impressive build quality and preformance for the money... 500 dollar AMD R5 build on a 8gb 5500xt, 32gb ddr4 with this board was a easy..." Read more

"...In all, the motherboard is a good value for the performance and stability that it delivers." Read more

"...MSI is a good brand and also a good bargain compared to some of the others offering much less in features...." Read more

"Before going into the problem I have, this is a great motherboard for the price. It works flawlessly with my R7 5800x and 3060...." Read more

33 customers mention27 positive6 negative

Customers like the ease of installation with this motherboard. They say it's easy to install, use, and build a PC with. The BIOS update procedure is simple and easy to do. Some customers also mention that the BIOS is standard and not too hard to navigate. Overall, customers are satisfied with the ease and convenience of installation.

"...The BIOS update procedure is simple--just download, unzip to a connected drive, boot to the UEFI BIOS, go to update BIOS mode, reboot, and point to..." Read more

"...Very easy to install, though I wish the I/O shield was integrated because the one included is flimsy and rather difficult to put in..." Read more

"Good motherboard. BIOS flashback was super easy to do. It also is good for vram" Read more

"...Easy to find where all cables are supposed to go with clear instructions on how to install...." Read more

87 customers mention39 positive48 negative

Customers are mixed about the performance of the motherboard. Some mention that it works great, while others say that it doesn't work with 5th generation GPUs and that the audio doesn''t play.

"...It showed as tested, but it clearly wasn't. A couple inputs didn't work.I then just bought it new and it's been great." Read more

"...on a 8gb 5500xt, 32gb ddr4 with this board was a easy build and works great. Running fortnite at 240fps perfectly without over clocking...." Read more

"...I used it in the morning, that afternoon it was no longer working. I apologize to AMD because I seriously though it was the processor...." Read more

"...It works flawlessly with my R7 5800x and 3060. It looks great as well, I really dig its aesthetic.Weird RAM installation...." Read more

14 customers mention9 positive5 negative

Customers have mixed opinions about the features of the motherboard. Some mention that it has good features, while others say that it doesn't have enough BIOS options. Some say that the BIOS setup is confusing. Overall, the opinions are mixed and the board is not recommended for beginners.

"This MSI motherboard has all the important features, and is fast. Put my PC together when I got all my parts and haven't had a problem since...." Read more

"...Otherwise it seems like an okay motherboard, not in love with the BIOS options, don't seem to be able to set the boot order by device, only by..." Read more

"...The features are great and it has really good VRM for the price...." Read more

"...reading countless reviews because of sobriety, very good VRM and nice features, including USB-C for the price...." Read more

13 customers mention3 positive10 negative

Customers are dissatisfied with the connectivity of the motherboard. They mention that the USB connection issues, and the Ethernet port does not work. Some say that the display port doesnot recognize the motherboard, and that the WiFi is not adaptable.

"...My only problem is that the Ethernet port on my motherboard was messed up upon arrival, I have to jury rig it with a pencil to stop it from..." Read more

"...I had the whole computer built before finding out that one of the USB ports was obstructed...." Read more

"...one equipped with wi-fi and bluetooth, as this motherboard has no onboard wi-fi or bluetooth support...." Read more

"...Connectors are generally laid out logically, making cable management relatively simple...." Read more

BIOS version info on new mobo's should be included in the box!
4 Stars
BIOS version info on new mobo's should be included in the box!
I was going to update an MSI B450 mobo and put a 5800x in it but decided to upgrade to this B550 A-Pro. I figured since it's Gen 4 and has another M.2 slot it would be great. I was thinking it might need an update right out of the box for the 5800x, but really wasn't expecting the frustration ahead. All done with install, I pushed the power button and got the solid white cpu debug lite, and was locked out of even the bios screen. All fans spun, but no post, or video out to monitor. Then tried reseating ram, cpu, checking board power connectors, all w/no luck. Then researched and completed a no cpu bios flasback with latest bios. Thumbdrive flashed for a while then stopped, so I thought I licked it. Then I saw that it wasn't going to shut down for restart on it's own when it should have done so, so I forced shutdown. Long story short...after retrying posts unsuccessfully many times after bios flashing I had a 2700x on hand to install. No cpu debug now, but a vga one!!! Grrrrr..........I solved it by checking and reseating the power leads for the gpu, and it finally posted. Bios info confirmed the flash I did 4 hrs ago took, and was now up to date, but never posted until I put in the older cpu. Now...hear this M.S.I., both the B550 mobo and 5800x released at about the same time, in fact, about 6 mo. apart, so I shouldn't be having this issue. I then resolved to reinstall the 5800x on the chance of it working now, after the bios had got a full load-in and finalization. It did, thank God, 'cause if it hadn't it would've been disassembled and put right back in the box for RMA, despite the extra work and hassle. I've put together about 25 pc's but this turned into THE MOST frustrating build for me, eating 12 hours of my day for the full build, when normal may be 4-6 hrs. It's been a few days and it's run perfectly fine since that mess, but I'll think twice about ordering another MSI mobo.
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Reviewed in the United States on February 27, 2024
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Antonio
5.0 out of 5 stars Great and Worth it
Reviewed in Canada on December 10, 2023
Style: MSI B550-A PRO ProSeries MotherboardVerified Purchase
LE G.
1.0 out of 5 stars Evaluation
Reviewed in France on May 8, 2023
Style: MSI B550-A PRO ProSeries MotherboardVerified Purchase
Luis Daniel Morales Castel
5.0 out of 5 stars Excelente
Reviewed in Mexico on December 24, 2020
Style: MSI B550-A PRO ProSeries MotherboardVerified Purchase
13 people found this helpful
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aravindkp
1.0 out of 5 stars The box was not sealed and contents were used
Reviewed in India on January 10, 2021
Style: MSI B550-A PRO ProSeries MotherboardVerified Purchase
4 people found this helpful
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Adi
5.0 out of 5 stars Great Motherboard
Reviewed in Australia on November 17, 2021
Style: MSI B550-A PRO ProSeries MotherboardVerified Purchase