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B550-A PRO
B550-A PRO
B550-A PRO
B550-A PRO
B550-A PRO
B550-A PRO

B550-A PRO

The MSI B550-A PRO helps users work smarter by delivering an efficient and productive experience. Featuring stable functionality and high-quality assembly, PRO series motherboards provide not only optimized professional workflows but also less troubleshooting and longevity.


  • Supports AMD Ryzen™ 5000 & 3000 Series desktop processors (not compatible with AMD Ryzen™ 5 3400G & Ryzen™ 3 3200G) and AMD Ryzen™ 4000 G-Series desktop processors
  • Supports dual channel DDR4 memory up to 128GB total (4400+MHz)
  • M.2 Shield FROZR: Strengthened built-in M.2 thermal solution. Keeps M.2 SSDs safe while preventing throttling, making them run faster.
  • Lightning Gen4 solution: The latest Gen4 PCI-E and M.2 solution with up to 64GB/s bandwidth for maximum transfer speed.
  • 2oz Thickened Copper PCB: An enhanced PCB design improves heat dissipation and performance reliability.
  • PCI-E Steel Armor: Protecting VGA cards against bending and EMI.
  • Core Boost: With premium layout and fully digital power design to support more cores and provide better performance.
  • DDR4 Boost: Advanced technology to deliver pure data signals for the best gaming performance and stability.
  • EZ Debug LED: Easiest way to troubleshoot.
  • Audio Boost: Reward your ears with studio grade sound quality for the most immersive audio experience.

Free Shipping

Free Shipping

On order over $25

Return for Refund

Return for Refund

Within 30 days

1-YEAR Limited Warranty

3-YEARS Limited Warranty

Base-on purchase date

$119.99
In Stock

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MAG B550 TOMAHAWK
MAG B550 TOMAHAWK
  • Supports AMD Ryzen™ 5000 & 3000 Series desktop processors (not compatible with AMD Ryzen™ 5 3400G & Ryzen™ 3 3200G) and AMD Ryzen™ 4000 G-Series desktop processors
  • Supports dual channel DDR4 memory up to 128GB total (4866+MHz)
  • Extended Heatsink Design: MSI extended PWM heatsink and enhanced circuit design ensures even high-end processors to run in full speed.
  • M.2 Shield FROZR: M.2 thermal accessory. Keeps M.2 SSDs safe while preventing throttling, making them run faster.
  • Lightning Gen4 solution: The latest Gen4 PCI-E and M.2 solution with up to 64GB/s bandwidth for maximum transfer speed.
  • 2oz Thickened Copper PCB: An enhanced PCB design improves heat dissipation and performance reliability.
  • 2.5G Plus Gigabit LAN: Onboard 2.5G, Gigabits LAN with LAN manager, delivers the better online network experience without lag.
  • Core Boost: With premium layout and fully digital power design to support more cores and provide better performance.
  • DDR4 Boost: Advanced technology to deliver pure data signals for the best gaming performance and stability.
  • Audio Boost: Reward your ears with studio grade sound quality for the most immersive audio experience.
WAS  $159.99  $139.99
MPG B550 GAMING PLUS
MPG B550 GAMING PLUS
  • Supports AMD Ryzen™ 5000 & 3000 Series desktop processors (not compatible with AMD Ryzen™ 5 3400G & Ryzen™ 3 3200G) and AMD Ryzen™ 4000 G-Series desktop processors
  • Supports dual channel DDR4 memory up to 128GB total (5100+MHz)
  • M.2 Shield FROZR: M.2 thermal accessory. Keeps M.2 SSDs safe while preventing throttling, making them run faster.
  • Lightning Gen4 solution: The latest Gen4 PCI-E and M.2 solution with up to 64GB/s bandwidth for maximum transfer speed.
  • 2oz Thickened Copper PCB: An enhanced PCB design improves heat dissipation and performance reliability.
  • Flash BIOS Button: Simply use a USB key to flash any BIOS within seconds, without installing a CPU, memory or graphics card.
  • Extended Heatsink Design: MSI extended PWM heatsink and enhanced circuit design ensures even high-end processors to run in full speed.
  • Pre-installed I/O Shielding: Better EMI protection and more convenience for installation.
  • EZ LED Control: One button to control LED on/off easily
  • Front Type-C USB 3.2 Gen 1 5Gbps: Compatible with the latest PC chassis and perfect for external drives and other mobile devices.
WAS  $159.99  $139.99
MAG B550 TOMAHAWK MAX WIFI
MAG B550 TOMAHAWK MAX WIFI
  • Supports AMD Ryzen™ 5000 & 3000 Series desktop processors (not compatible with AMD Ryzen™ 5 3400G & Ryzen™ 3 3200G) and AMD Ryzen™ 4000 G-Series desktop processors
  • Supports DDR4 Memory, up to 5100+(OC) MHz
  • Lightning Fast Game experience: PCIe 4.0, Lightning Gen 4 x4 M.2 with M.2 Shield Frozr, AMD Turbo USB 3.2 Gen 2
  • Premium Thermal Solution: Extended Heatsink Design with additional choke thermal pad rated for 7W/mk and PCB with 2oz thickened copper are built for high performance system and non-stop gaming experience.
  • Enhanced Power Design: 10+2+1 Duet Rail Power System, Digital PWM, Core Boost, DDR4 Boost.
  • 2.5G LAN with LAN Manager and AMD Wi-Fi 6E Solution: Upgraded network solution for professional and multimedia use. Delivers a secure, stable and fast network connection.
  • Pre-installed I/O Shield: Better EMI protection and more convenience for installation.
  • Audio Boost: Reward your ears with studio grade sound quality for the most immersive gaming experience.
  • Multi-GPU: With Steel Armor PCI-E slots. Supports AMD Crossfire™
WAS  $179.99  $159.99
B550 GAMING GEN3
B550 GAMING GEN3
  • Supports AMD Ryzen™ 5000 & 3000 Series desktop processors (not compatible with AMD Ryzen™ 5 3400G & Ryzen™ 3 3200G) and AMD Ryzen™ 4000 G-Series desktop processors
  • Supports DDR4 Memory, up to 4400(OC) MHz
  • Lightning Fast Game experience: Turbo M.2 Gen3 x4, AMD Turbo USB 3.2 GEN 2
  • Enhanced Power Design: Core Boost, DDR4 Boost
  • MULTI-GPU: With STEEL ARMOR PCI-E slots. Supports AMD Crossfire™
  • Flash BIOS Button with Optmized ClearCMOS Function: Simply use a USB key to flash any BIOS within seconds. Restore the BIOS to the default settings without any additional actions.
  • Audio Boost: Reward your ears with studio grade sound quality
WAS  $119.99  $109.99
PRO B550M-VC WIFI
PRO B550M-VC WIFI
  • Supports AMD Ryzen™ 5000 & 3000 Series desktop processors (not compatible with AMD Ryzen™ 5 3400G & Ryzen™ 3 3200G) and AMD Ryzen™ 4000 G-Series desktop processors
  • Supports DDR4 Memory, up to 4400(OC) MHz
  • Lightning Fast Experience: PCIe 4.0, Lightning Gen4 x4 M.2 with M.2 Shield Frozr
  • Premium Thermal Solution: 7W/mK pad, additional choke thermal pad and M.2 Shield Frozr are built for high performance system and non-stop works
  • Powerful Design: Core Boost, Digital PWM IC, 2oz Thickened Copper PCB, Creator Genie, DDR4 Boost
  • Audio Boost: Reward your ears with studio grade sound quality
  • Dragon Center: A brand new software which integrates all MSI exclusive tools with user friendly user interface.  
WAS  $119.99  $99.99
MAG B550M MORTAR MAX WIFI
MAG B550M MORTAR MAX WIFI
  • Supports AMD Ryzen™ 5000 Series, 5000 G-Series, 4000G-Series, and 3000 Series processors
  • Supports DDR4 Memory, up to 4400+(OC) MHz
  • Lightning Fast Game experience: PCIe 4.0, Lightning Gen 4 x4 M.2 with M.2 Shield Frozr, AMD Turbo USB 3.2 Gen 2
  • Premium Thermal Solution: Extended Heatsink Design with additional choke thermal pad rated for 7W/mk and PCB with 2oz thickened copper are built for high performance system and non-stop gaming experience.
  • Enhanced Power Design: 8+2+1 Duet Rail Power System, Digital PWM, Core Boost, DDR4 Boost.
  • 2.5G LAN and AMD Wi-Fi 6E Solution: Upgraded network solution for professional and multimedia use. Delivers a secure, stable and fast network connection.
  • Pre-installed I/O Shield: Better EMI protection and more convenience for installation.
  • Audio Boost: Reward your ears with studio grade sound quality for the most immersive gaming experience.
  • Multi-GPU: With Steel Armor PCI-E slots. Supports AMD Crossfire™
WAS  $159.99  $139.99

DETAIL SPECIFICATION

OPERATING SYSTEM Support for Windows® 10 64-bit
Manufacturer Number B550-A PRO
Product Condition New
CPU Supports AMD Ryzen™ 5000 & 3000 Series desktop processors (not compatible with AMD Ryzen™ 5 3400G & Ryzen™ 3 3200G) and AMD Ryzen™ 4000 G-Series desktop processors
Chipset AMD® B550 Chipset
CPU Socket AM4
Form Factor ATX
Memory 4 x DDR4 memory slots, support up to 128GB
  • Supports DDR4 1866/ 2133/ 2400/ 2667/ 2800/ 2933/ 3000/ 3066/ 3200 MHz by JEDEC
  • Supports DDR4 2667/ 2800/ 2933/ 3000/ 3066/ 3200/ 3466/ 3600/ 3733/ 3866/ 4000/ 4133/ 4266/ 4400+ MHz by A-XMP OC MODE
  • 1DPC 1R max speed 4800 MHZ
  • 1DPC 2R max speed 3866 MHZ
  • 2DPC 1R max speed 4000 MHZ
  • 2DPC 2R max speed 3600 MHZ

  • Dual channel memory architecture
    Supports non-ECC UDIMM memory
    Supports ECC UDIMM memory (non-ECC mode)
    Supports un-buffered memory
    LAN 1 x Realtek® RTL8111H Gigabit LAN Controller
    Wireless LAN N/A
    Bluetooth N/A
    Audio Realtek® ALC892 Codec
  • 7.1-Channel High Definition Audio
  • MULTI-GPU Supports 2-Way AMD CrossFire™ Technology
    STORAGE 1 x M.2 Gen4 x4 slot
    1 x M.2 Gen3 x4 slot
    6 x SATA 6Gb/s ports
    Onboard Graphics 1 x HDMI port, supports a maximum resolution of 4096x2160 @24Hz
    1 x DisplayPort, supports a maximum resolution of 4096x2160 @60Hz
    Maximum shared memory of 2048 MB
    RAID Supports RAID 0, RAID 1 and RAID 10
    I/O (Rear) Keyboard / Mouse
    DisplayPort
    LAN
    HD Audio Connectors
    Flash BIOS Button
    USB 2.0
    HDMI
    USB 2.0
    USB 3.2 Gen 1 5Gbps Type-A
    USB 3.2 Gen 2 10Gbps Type-A+C
    Expansion Slots 1 x PCIe 4.0/ 3.0 x16 slot (PCI_E1)
    1 x PCIe 3.0 x16 slot (PCI_E3), supports x4 speed
    2 x PCIe 3.0 x1 slots
    USB (Front) 1 x (Gen1, Type C)
    2 x (Gen1, Type A)
    4 x (v2.0)
    USB (Rear) 1 x (Gen2, Type C)
    1 x (Gen2, Type A)
    2 x (Gen1, Type A)
    4 x (v2.0)
    Internal Connectors 1 x 24-pin ATX main power connector
    1 x 8-pin ATX 12V power connector
    6 x SATA 6Gb/s connectors
    2 x M.2 slots (M-Key)
    1 x USB 3.2 Gen 1 5Gbps Type-C port
    1 x USB 3.2 Gen 1 5Gbps connector (supports additional 2 USB 3.2 Gen 1 5Gbps ports)
    2 x USB 2.0 connectors (supports additional 4 USB 2.0 ports)
    1 x 4-pin CPU fan connector
    1 x 4-pin water-pump fan connector
    6 x 4-pin system fan connectors
    1 x Front panel audio connector
    2 x System panel connectors
    1 x Chassis Intrusion connector
    1 x 4-pin RGB LED connector
    2 x 3-pin RAINBOW LED connectors
    1 x TPM module connector
    1 x Clear CMOS jumper
    Dimensions 12.00" x 9.60"
    Manufacturer Warranty 3 Year

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