RAM | DDR4 |
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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 |
4.5 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
Feedback
Videos for similar products
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)
Safety and product resources
Safety documents
Top Brand: MSI
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 5,752
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4.5 out of 5 stars 462
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4.5 out of 5 stars 433
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4.2 out of 5 stars 400
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4.5 out of 5 stars 3,568
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4.5 out of 5 stars 3,841
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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 |