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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  • 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
Category:
  • 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

    See supported processors

    CHIPSET

    AMD B550 Chipset

    MEMORY

    • 4x DDR4 memory slots, support up to 128GB 1
      • 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
    1. Please refer www.msi.com for more information on compatible memory.

    EXPANSION SLOT

    • 1x PCIe 4.0/ 3.0 x16 slot (PCI_E1) 1
    • 1x PCIe 3.0 x16 slot (PCI_E3), supports x4 speed 2
    • 2x PCIe 3.0 x1 slots
    1. The supported specification depends on installed processor.
    2. When installing PCIe SSD in M.2_2, PCI_E3 slot will be unavailable.

    MULTI-GPU

    • Supports 2-Way AMD CrossFire Technology

    ONBOARD GRAPHICS

    • 1x HDMI 2.1 port, supports a maximum resolution of 4096×2160 @60Hz 1 2
      Support HDCP 1.4 & 2.3
    • 1x DisplayPort, supports a maximum resolution of 4096×2160 @60Hz 1
    • Maximum shared memory of 16 GB
    1. Available for the processor with integrated graphics.
    2. Graphics specifications may vary depending on the CPU installed.

    STORAGE

    AMD B550 Chipset

    • 6x SATA 6Gb/s ports
    • 2x M.2 slots (Key M)
      • M2_1 slot (from AMD Processor)
        • Supports PCIe 4.0/ 3.0 x4 1
        • Supports SATA 6Gb/s
        • Supports 2242/ 2260/ 2280/ 22110 storage devices
      • M2_2 slot (from AMD B550 chipset)
        • Supports PCIe 3.0×4
        • Supports 2242/ 2260/ 2280 storage devices
    1. The supported specification depends on installed processor.

    RAID

    • Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices
    • Supports RAID 0 and RAID 1 for M.2 NVMe storage devices

    USB

    AMD B550 Chipset

    • 3x USB 3.2 Gen 1 5Gbps ports (1 Type-C internal connector, and 2 ports are available through the internal USB 3.2 Gen 1 5Gbps connector)
    • 8x USB 2.0 ports (4 Type-A ports on the back panel, 4 ports through the internal USB 2.0 connectors)

    AMD Processor

    • 2x USB 3.2 Gen 2 10Gbps ports (1 Type-C port and 1 Type-A port on the back panel)
    • 2x USB 3.2 Gen 1 5Gbps Type-A ports on the back panel

    AUDIO

    Realtek® ALC892/ALC897 Codec

    • 7.1-Channel High Definition Audio

    LAN

    • 1x Realtek® 8111H Gigabit LAN controller

    INTERNAL CONNECTORS

    • 1x 24-pin ATX main power connector
    • 1x 8-pin ATX 12V power connector
    • 6x SATA 6Gb/s connectors
    • 2x M.2 slots (M-Key)
    • 1x USB 3.2 Gen 1 5Gbps Type-C port
    • 1x USB 3.2 Gen 1 5Gbps connector (supports additional 2 USB 3.2 Gen 1 5Gbps ports)
    • 2x USB 2.0 connectors (supports additional 4 USB 2.0 ports)
    • 1x 4-pin CPU fan connector
    • 1x 4-pin water-pump fan connector
    • 6x 4-pin system fan connectors
    • 1x Front panel audio connector
    • 2x System panel connectors
    • 1x Chassis Intrusion connector
    • 1x 4-pin RGB LED connector
    • 2x 3-pin RAINBOW LED connectors
    • 1xTPM module connector
    • 1x Clear CMOS jumper

    BACK PANEL PORTS

    1. Keyboard / Mouse
    2. DisplayPort
    3. LAN
    4. HD Audio Connectors
    5. Flash BIOS Button
    6. USB 2.0
    7. HDMI
    8. USB 2.0
    9. USB 3.2 Gen 1 5Gbps Type-A
    10. USB 3.2 Gen 2 10Gbps Type-A+C
    MSI B550-A PRO back panel ports

    DIMENSIONS

    • ATX Form Factor
    • 12 in. x 9.6 in. (30.5 cm x 24.4 cm)

    MOUNTING

    9 mounting holes

    BOX CONTENT

    MSI B550-A PRO box content

    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

    Experience the new generation of the B550-A PRO motherboard powered by 3rd Gen AMD 3000 series AM4 processors. Outperform your system’s capacity with Lightning Gen 4 solution. Exclusive DDR4 Boost and Core Boost are created to keep you one step ahead of your competition. Extended Heatsink Design, 7W/mK level thermal & choke pad with 2oz thickened copper help your PC remain cool, high performing and reliable.

     

    • Designed for 3rd Gen AMD Ryzen processors with Lightning M.2, PCIe 4.0, USB 3.2 Gen 2
    • Addressable LED Ready with a JRAINBOW pinheader addressable RGB strips and control the RGB light all around the system.
    • Extended Heatsink Design improves VRM heat dissipation and ensures the power delivery system can sustain even high-end processors running at full load.
    • Front USB Type-C allows gamers to be compatible with the latest PC chassis and perfect for external drives and other mobile devices.

     

Additional information

Weight1 kg
Dimensions30 × 30 × 10 cm
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