RAM | DDR4 |
---|---|
Memory Speed | 6 |
Number of USB 2.0 Ports | 2 |
Brand | MSI |
Series | B550-A PRO |
Item model number | B550-A PRO |
Product Dimensions | 30.48 x 24.38 x 3.81 cm; 1.5 kg |
Item dimensions L x W x H | 30.5 x 24.4 x 3.8 Centimetres |
Number of Processors | 1 |
Memory Type | DDR4 SDRAM |
Voltage | 1 Volts |
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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)
Purchase options and add-ons
Brand | MSI |
CPU socket | Socket AM4 |
Compatible devices | Personal Computer |
RAM memory technology | DDR4 |
Compatible processors | AMD 3rd Generation Ryzen |
Chipset type | AMD B550 |
Memory clock speed | 6 |
Platform | Windows 10 |
Model name | B550-A PRO |
Memory storage capacity | 128 GB |
About this item
- 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. USB 3.2 ports (Front): 1(Gen 1, Type C), 2(Gen 1, Type A), USB 3.2 ports (Rear): 1(Gen 2, Type C), 1(Gen 2, Type A), 2(Gen 1, Type A)
- 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
Frequently bought together

Product information
Technical Details
Summary
Additional Information
ASIN | B089CZSQB4 |
---|---|
Customer Reviews |
4.4 out of 5 stars |
鶹 Rank |
|
Date First Available | June 16 2020 |
Manufacturer | MSI COMPUTER |
Place of Business | CITY OF INDUSTRY, CA, 91748 US |
Warranty & Support
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Product description
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)
Top Brand: MSI
Compare with similar items
This Item ![]() 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) | Recommendations | |||||
Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | |
Price | $134.99$134.99 | $199.99$199.99 | -8%$174.98$174.98 Was: $189.99 | -7%$139.99$139.99 List: $149.99 | $149.99$149.99 | $189.98$189.98 |
Delivery | Get it by Tuesday, Jun 24 | Get it by Tuesday, Jun 24 | Get it by Tuesday, Jun 24 | Get it by Tuesday, Jun 24 | Get it by Thursday, Jun 26 | Get it by Tuesday, Jun 24 |
Customer ratings | ||||||
Sold by | 鶹.ca | 鶹.ca | 鶹.ca | 鶹.ca | 鶹.ca | 鶹.ca |
platform | windows 10 | windows 10 | windows 11 | windows 10 | windows | windows |
CPU socket | Socket AM4 | Socket AM4 | Socket AM5 | Socket AM4 | Socket AM4 | Socket AM4 |
memory slots | 4 | 4 | 4 | 4 | 4 | 4 |
memory capacity | 128 GB | 128 GB | 64 GB | 32 GB | 1 GB | 128 GB |
compatible processors | AMD 3rd Generation Ryzen | AMD Ryzen 5000 Series, 5000 G-Series, 4000 G-Series,3000 | AMD Athlon | AMD 3rd Generation Ryzen | AMD 3rd Generation Ryzen | AMD 3rd Generation Ryzen |
number of ports | 23 | 9 | 20 | 17 | 17 | 12 |
card interface | pci e | pci e 4 | pci | pci e | integrated, agp | pci e |
wireless standard | — | — | bluetooth | 802 11 ABGNAC | — | 802 11 ABGNAC, 802 11 AX |
RAM tech | DDR4 | DDR4 | DDR5 | DDR4 | DDR4 | DDR4 |
S/PDIF connector type | Optical | Optical | Optical | Optical | Optical | Optical |
system bus standard | SATA 3 | SATA 3 | SATA 3 | SATA 3 | SATA 3 | SATA 3 |
From the manufacturer


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
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.
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.
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Customer Reviews |
4.6 out of 5 stars 5,688
|
4.5 out of 5 stars 462
|
4.5 out of 5 stars 432
|
4.2 out of 5 stars 399
|
4.4 out of 5 stars 3,476
|
4.5 out of 5 stars 3,722
|
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 |
Brands in this category on 鶹
Customer reviews
Customers say
Customers like the performance, installation, and design of the motherboard. They mention it's good enough to run a mid-high-end build, has a sleek design, and has more ports that they needed. Customers also like the features, BIOS interface, and BIOS update. However, some customers have mixed opinions on the build quality.
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Customers are satisfied with the performance of the motherboard. They mention it's good enough to run a mid-high-end build and performs similar to higher-priced boards. Customers also say it's reliable and never had any issues.
"...Quality and performance are stellar. Installing components was easy, all clips/headers are pretty firm too...." Read more
"Was a great motherboard for the time I had it, nothing much to speak on. I had no problems with it whatsoever...." Read more
"Works well" Read more
"...Other than that and the fact it doesn't have wifi, it's a great atx motherboard to get on a budget since it has pcie 4.0 for both the gpu and m.2." Read more
Customers find the motherboard easy to install and work with. They mention the Windows installation went without a glitch and all parts clicked into place nicely. Customers also say the motherboard is excellent for the price.
"...Quality and performance are stellar. Installing components was easy, all clips/headers are pretty firm too...." Read more
"The motherboard was very easy to install and clear about what goes where. All parts clicked into place nicely...." Read more
"...Windows installation went without a glitch but there were recurrent black screens requiring rebooting almost immediately or seconds after entering..." Read more
"...Easy to work with and lots of quality materials and features...." Read more
Customers like the sleek design of the motherboard. They mention it's nice and looks really great for the price.
"...They were reliable and I never had any issues. So far this well designed motherboard has been running solid for 24 hours and no crashes or anything..." Read more
"...The BIOS interface is simple and easy to use with a sleek design...." Read more
"Got decently cheap and it looks really great for the price" Read more
"I love the design of this mobo, the heatsinks are very nice looking and function very well on top of that...." Read more
Customers like the ports of the motherboard. They mention it has more ports that they needed, such as two M.2 ports for those looking to expand their SSDs, and a button and USB slot so you can reinstall the firmware.
"...This motherboard has a button and USB slot so you can reinstall the firmware and not lost a motherboard! That by itself is worth it.)..." Read more
"...It's quite handy to have 6 SATA ports at the sides so it's easier to plug them in my opinion...." Read more
"...Lack of RGB is not a problem for me, but ports are these for your RGB strips and fans. BIOS is easy to use...." Read more
"...compared to the last one I got this one was cheaper and has more ports that I needed." Read more
Customers like the features of the motherboard. They mention it has all the features you might need for gaming without shelling out for a top-of-the-line motherboard.
"Has all the features you might need for gaming without shelling out for a top-of-the-line motherboard. Quality and performance are stellar...." Read more
"...The first motherboard and laptop were great feature wise. They were reliable and I never had any issues...." Read more
"...Easy to work with and lots of quality materials and features...." Read more
"It's a great board for the price and includes a bunch of features that are normally not seen in budget boards...." Read more
Customers like the BIOS interface of the motherboard. They mention it's simple, easy to use, and has a basic and advanced mode.
"...The BIOS interface is simple and easy to use with a sleek design...." Read more
"...Zero issues with the board. The bios has a basic and advanced mode, and if you can't find a setting, the search works great..." Read more
"...BIOS is easy to use. Good mid range option for Ryzen 5000 series CPUs." Read more
"MSi is the best motherboard maker! Easiest bios to navigate! Ease of installing other hardware parts!" Read more
Customers are satisfied with the BIOS update of the motherboard. They mention it's updated without issues, and the processor is working solid.
"Wrkd out of the box with a Ryzen 7 5800X. There was no need to update the BIOS. Does what it is supposed to do." Read more
"...This board does everything I need, seems sturdy. No issues with updating firmware..." Read more
"Worked out of box with Ryzen 5 5600G, no BIOS update required, Processor OC working solid. Lots of options for RGB, Fans, ARGB...." Read more
"...I've had no problems updating the BIOS through the UI and through the handy BIOS flash button on the back of the motherboard...." Read more
Customers have mixed opinions about the build quality of the motherboard. Some mention it's solid, has lots of quality materials, and features. However, some customers have reported receiving faulty or broken motherboards.
"...Installing components was easy, all clips/headers are pretty firm too...." Read more
"...So far this well designed motherboard has been running solid for 24 hours and no crashes or anything of the sort." Read more
"...than recall all boards to fix it - they still shipped these broken motherboards...." Read more
"...This board does everything I need, seems sturdy...." Read more
Reviews with images

Great Budget Motherboard
Top reviews from Canada
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- Reviewed in Canada on May 17, 2025Verified PurchaseHas all the features you might need for gaming without shelling out for a top-of-the-line motherboard. Quality and performance are stellar. Installing components was easy, all clips/headers are pretty firm too. No WiFi unfortunately, but you can get a good PCIe WiFi 6 adapter card for pretty cheap nowadays if you need it.
NOTE: The CMOS battery can be a pain to remove. For some reason, MSI decided to jam a small black rectangular piece of plastic into the metal clip that holds the battery in place, preventing you from being able to compress said clip to release the battery. You have to flip your motherboard upside down and poke at the piece of plastic a bit to get it to fall out. No idea why MSI decided to do this.
- Reviewed in Canada on May 24, 2025Verified PurchaseWrkd out of the box with a Ryzen 7 5800X. There was no need to update the BIOS. Does what it is supposed to do.
- Reviewed in Canada on May 3, 2025Verified PurchaseWas a great motherboard for the time I had it, nothing much to speak on. I had no problems with it whatsoever. I only dont use it anymore because I upgraded to the newer AM5 platform. The only thing I can think of being a problem for some people is its lack of wifi.
- Reviewed in Canada on May 12, 2025Verified PurchaseWorks well
- Reviewed in Canada on May 30, 2025Verified PurchaseGOOD
- Reviewed in Canada on January 21, 2025Verified PurchaseThe motherboard was very easy to install and clear about what goes where. All parts clicked into place nicely. Only issue I had was with the cooler brackets, my wraith prism cooler wouldn't lock into it properly so I had to use the brackets that came with the cpu. Other than that and the fact it doesn't have wifi, it's a great atx motherboard to get on a budget since it has pcie 4.0 for both the gpu and m.2.
The motherboard was very easy to install and clear about what goes where. All parts clicked into place nicely. Only issue I had was with the cooler brackets, my wraith prism cooler wouldn't lock into it properly so I had to use the brackets that came with the cpu. Other than that and the fact it doesn't have wifi, it's a great atx motherboard to get on a budget since it has pcie 4.0 for both the gpu and m.2.
Images in this review
- Reviewed in Canada on May 26, 2024Verified PurchaseSystem Specs:
This mobo with a brand new shipped to me last week Ryzen 7 5800x that was on supported list since Rev 1.
System worked great for 2 days until Windows 11 update declared my CPU no longer supported!
After months of denial this issue is known to MSI and rather than recall all boards to fix it - they still shipped these broken motherboards.
Installed the latest 04/24 update allegedly correctly and still won't work. This is a brand new PC build - all parts compatible, it's bull that I get this error.
Bought in October 2023, open installed on May 24, ran for 2 days then update, then BSOD so fast that I can't even bring up the error message it was sending. After BSOD forces reboot - at times it can stay in desktop. Fresh install Windows 11 and 10, both failed. Note all HDDs clean low level formatted, with no issues in any other device including an unopened NVMe 1TB drive used for initial Win 11 install. Gave more BSODs after the last install.
No other software installed btw, no games, no apps no nothing, just base. No RAM issues either, though they did state an apparent IRQ conflict but board refuses to boot into safe mode, just BSODs.
Stay away; it's as bad as ASUS tech now; their tech just isn't up to snuff. Worried my new Gigabyte board may be broken on arrival as well.
- Reviewed in Canada on March 9, 2025Verified PurchaseGreat mobo, paired with ryzen 5700 and patroit 3600 32g, enabled set boot drive and it flies, super board
Top reviews from other countries
- R. ShabayekReviewed in the United Arab Emirates on December 3, 2022
1.0 out of 5 stars I owned it for a year, and it's still buggy
Verified PurchaseI flashed the BIOS, did everything I can think of, and still I get random BSOD: memory corruption, bad drivers, many various errors from Windows 10. I searched online and found out that other people complain from the same Motherboard model for random erros. I didn't expect this from MSI and doubt they would replace my motherboard, but my next Motherboard won't be an MSI for sure. You lost me MSI.
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LeonReviewed in Mexico on September 25, 2024
5.0 out of 5 stars Completa
Verified PurchaseEn cuento a sus características es una Motherboard muy completa y de una muy buena calidad, único detalle que le encontraría es que la cubierta de los puertos es fea, pero ya es un gusto personal y no afecta en nada al rendimiento del equipo
- AdiReviewed in Australia on November 17, 2021
5.0 out of 5 stars Great Motherboard
Verified PurchaseGreat price for a more budget oriented AM4 motherboard. Preparing it is even easier since it's already ready for Ryzen 5000 CPUs. Only critique I have is the rear i/o shielding feels low quality but this isn't a serious problem since people shouldn't look at the back of the case.
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abdulazizReviewed in Saudi Arabia on June 17, 2024
5.0 out of 5 stars افضل بورد مقابل السعر
Verified Purchaseتمت تجربتها مع معالج 5600 رائعه بمعنى الكلمة بسعر منافس 480 ريال مع 2 usb type c
و 10+2 VRAM تعطيك بوست بدون ضغط مع استقرار و جودة البورد واضحه مع العلم انها وصلتني بدون amd5000 ready وقمت بعمل تحديث للبايوس قبل تركيب المعالج عن طريق الفلاش بايوس وعملت بكل سلاسه من اول تشغيل
البايوس رائع وواضح ومنظم من شركة MSI بعكس شركة gigabyte المعقد خصوصا عند تحديثه
اعجبني وجود 8 مقابس للمراوح لاني استخدمتها على corsair 4000d airflow وركبت 5 مراوح غير مروحه المشتت
الصوت ممتاز ونقي في الالعاب وغيرها
تتميز بوجود اثنينusb3.2 gen1 بسرعة 5gb وواحد gen2 بسرعة 10gb وtype-c 10gb كلها متصله مباشرة مع المعالج
انصح بشده لمن يرغب باداء فوق المتوسط بسعر منافس مع اني كنت محتار بينها وبين pro-vdh ولكن لامقارنه بينهما ولايهم ال واي فاي مقابل الميزات السابقه
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Cristian SReviewed in the United States on June 13, 2025
5.0 out of 5 stars Uno de los grandes calidad/precio de las motherboard
Verified PurchaseSu rendimiento y compatibilidad la ponen en un punto bastante cómodo estar junto a otras board de la generación actual, llevo varios años con ella y hasta ahora no he tenido un solo problema con ella, la estoy utilizando en conjunto con una 5600X de AMD y antes estuve utilizándola con una 3400G, no tuvo problemas con ninguno de estos procesadores, su interfaz es bastante cómoda