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MSI PRO B550-A PRO AM4 AMD B550 SATA 6Gb/s USB 3.0 ATX AMD Motherboard

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  • B550-A PRO
  • B550M PRO-VDH WIFI
  • MAG B550 TOMAHAWK
  • MAG B550 TOMAHAWK MAX WIFI
  • MPG B550 GAMING PLUS
  • PRO B550-VC
  • PRO B550M-VC WIFI
  • B550 Gaming Gen 3
  • MAG B550M MORTAR MAX WIFI DDR4
  • AMD B550
  • Supports AMD Ryzen 5000 Series / 4000 G-Series / 3000 Series processors *
  • * Not compatible with AMD Ryzen 5 3400G & Ryzen 3 3200G.
  • DDR4 4400+ / 4266 / 4133 / 4000 / 3866 / 3733 / 3600 / 3466 / 3200 / 3066 / 3000 / 2933 / 2800 / 2667 by A-XMP OC MODE
  • DDR4 3200 / 3066 / 3000 / 2933 / 2800 / 2667 / 2400 / 2133 / 1866 by JEDEC
  • 1DPC 1R Max speed 4800
  • 1DPC 2R max speed 3866
  • 2DPC 1R max speed 4000
  • 2DPC 2R max speed 3600
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Overview
Specs
Reviews
B550-A PRO
EXCLUSIVE FEATURES
B550-A PRO motherboard
icon-core_boost
Flash BIOS Button

Use a USB drive to flash the BIOS even without a CPU or memory.

icon-core_boost
Core Boost Technology

An optimized power circuit layout is ready to unleash maximum performance.

icon-2oz_thickened
2oz Thickened Copper PCB

An enhanced PCB material design improves heat dissipation and high-performance capabilities.

icon-digital_pwm
Digital PWM

A selection of the highest quality power delivery components lets the system run reliably even under extreme conditions.

icon-steel_armor
PCIe Steel Armor

Reinforced and shielded PCIe slots for strength and stability.

B550-A PRO
PREMIUM THERMAL SOLUTION
B550-A PRO motherboard
icon-k7
7W/mK Thermal Pad

Premium 7W/mK thermal pad covers both the MOSFET and chokes while providing better heat transfer to the heatsink.

icon-extended_heatsink
Extended Heatsink

Larger heatsink design for cooling and performance.

icon-pump_fan
Pump Fan Support

Control watercooling pump speeds for flowrate and noise control.

icon-m_2_shield
M.2 Shield Frozr

Sustain maximum high-speed M.2 SSD data transfer with M.2 SHIELD FROZR and prevent SSD thermal throttling.

B550-A PRO
HIGH-SPEED TRANSMISSION
B550-A PRO wifi motherboard
icon-turbo_usb
Turbo USB

Featuring TURBO USB 3.2 GEN 2 10Gbps with reversible Type-C connector.

icon-m_2_shield_frozr
DDR4 Boost

The memory circuit design has been optimized on a reserved section of the motherboard fully isolated from other circuits.

icon-lightning
Lightning Gen 4 Solution

Transfer data lightning fast across Gen 4 PCI-E and M.2 with up to 64GB/s bandwidth.

core boost of motherboard
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.

the ports of the motherboard
10 +2 +1 DUET RAIL POWER SYSTEM

Unleash and sustain maximum performance with an aggressive VRM design built to supply stable and steady power delivery.

  • 10 phase Duet Rail Power System
  • 2 phase SOC Power
  • 1 phase APU Power
  • Digital PWM IC
extedned  heatsink of the motherboard
EXTENDED HEATSINK

An all-metal extended heatsink cover enlarges the heat dissipation surface allowing the CPU power system to reliably drive multi-core processors.

the 2oz thickened copper of the motherboard
PCB WITH 2OZ THICKENED COPPER

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

the usb_type of the motherboard
USB TYPE-C READY - REAR IO & FRONT CASE PANEL SUPPORT

Effortlessly plug in devices with reversible USB Type-C.

LIGHTNING GEN4 of the motherboard
LIGHTNING GEN4 M.2 WITH M.2 SHIELD FROZR

Sustain maximum M.2 SSD data transfer with M.2 SHIELD FROZR. Prevent SSD thermal throttling with a heatsink that extends across the motherboard.

lightning_gen4 of the motherboard
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.

a chart showing different effect between DDR4 BOOST and OTHERS
UNMATCHED MEMORY PERFORMANCE

MSI takes memory stability and performance to the extreme. We've designed an optimized memory circuit design for reliability and tested compatibility extensively in partnership with major memory manufacturers.

port of the motherboard
EASY TO ARRANGE YOUR CABLES

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

detail of the connection of the video
MULTIPLE GPU SUPPORT AND STEEL ARMOR

B550-A PRO supports AMD CrossFire multi GPU technology. PCI-E slot placements provide optimal airflow for graphics card cooling.

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 counts, Steel Armor shields the point of contact from electromagnetic interference.

Warranty & Returns

Warranty, Returns, And Additional Information

Return Policies*

  • Return for refund within: 30 days
  • Returns are subject to restocking fees and return shipping fees. Please click here to learn more about restocking fees and return shipping fees.
  • This item is covered by Newegg.com's International Order Return Policy. Read full return policy for details.
  • *Subject to applicable law
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