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    MSI MEG B550 UNIFY-X AM4 AMD B550 SATA 6Gb/s USB 3.0 ATX AMD Motherboard

    • AMD B550
    • 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
    • AMD Ryzen 4000 G-Series processors support DDR4 5300+ (Max. 5800)/ 5100/ 5000/ 4866/ 4800/ 4733/ 4600/ 4533/ 4400/ 4266/ 4133/ 4000/ 3866/ 3733/ 3600/ 3466/ 3200/ 3066/ 3000/ 2933/ 2800/ 2667 MHz by A-XMP OC MODE
    • 3rd Gen AMD Ryzen processors supports DDR4 5100+/ 5000/ 4866/ 4800/ 4733/ 4600/ 4533/ 4400/ 4266/ 4133/ 4000/ 3866/ 3733/ 3600/ 3466/ 3200/ 3066/ 3000/ 2933/ 2800/ 2667 MHz by A-XMP OC MODE
    • Supports DDR4 3200/ 3066/ 3000/ 2933/ 2800/ 2667/ 2400/ 2133/ 1866 MHz by JEDEC
    • AMD Ryzen 4000 G-Series processors:
    • 1DPC 1R max speed 5300 MHz (QVL), Max. 5800 MHz
    • 1DPC 2R max speed 4266 MHz (QVL), Max. 4600 MHz
    • 3rd Gen AMD Ryzen processors:
    • 1DPC 1R max speed 5100 MHz (QVL), Max. 5300 MHz
    • 1DPC 2R max speed 4260 MHz (QVL)
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    Specs
    Reviews (12)

    Learn more about the MSI MEG B550 UNIFY-X

    Model
    Brand MSI
    Model MEG B550 UNIFY-X
    Supported CPU
    CPU Socket Type AM4
    CPU Type 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
    Chipsets
    Chipset AMD B550
    Memory
    Number of Memory Slots 2x288pin (DDR4)
    Memory Standard AMD Ryzen 4000 G-Series processors support DDR4 5300+ (Max. 5800)/ 5100/ 5000/ 4866/ 4800/ 4733/ 4600/ 4533/ 4400/ 4266/ 4133/ 4000/ 3866/ 3733/ 3600/ 3466/ 3200/ 3066/ 3000/ 2933/ 2800/ 2667 MHz by A-XMP OC MODE
    3rd Gen AMD Ryzen processors supports DDR4 5100+/ 5000/ 4866/ 4800/ 4733/ 4600/ 4533/ 4400/ 4266/ 4133/ 4000/ 3866/ 3733/ 3600/ 3466/ 3200/ 3066/ 3000/ 2933/ 2800/ 2667 MHz by A-XMP OC MODE
    Supports DDR4 3200/ 3066/ 3000/ 2933/ 2800/ 2667/ 2400/ 2133/ 1866 MHz by JEDEC

    AMD Ryzen 4000 G-Series processors:
    1DPC 1R max speed 5300 MHz (QVL), Max. 5800 MHz
    1DPC 2R max speed 4266 MHz (QVL), Max. 4600 MHz
    3rd Gen AMD Ryzen processors:
    1DPC 1R max speed 5100 MHz (QVL), Max. 5300 MHz
    1DPC 2R max speed 4260 MHz (QVL)
    Maximum Memory Supported 64GB
    Channel Supported Dual Channel
    Expansion Slots
    PCI Express 4.0 x16 1 x PCIe 4.0/3.0 x16 slot (PCI_E1) *
    * The supported specification depends on installed processor.
    PCI Express 3.0 x16 1 x PCIe 3.0 x16 slot (PCI_E4), supports x4 speed
    * The PCI_E4 slot will be unavailable, when installing M.2 SSD into M2_4.
    PCI Express x16 1 x PCI Express x16
    PCI Express x1 2 x PCIe 3.0 x1 slots (PCI_E2 & PCI_E3)
    * The both PCIe x1 slots will be unavailable after you install the M.2 SSD into M2_2 slot in Chipset support mode (default mode).
    Storage Devices
    SATA 6Gb/s 6 x SATA 6Gb/s ports 1 2
    1. The SATA5 port will be unavailable when installing M.2 SATA SSD into M2_3.
    2. The SATA5 and SATA6 ports will be unavailable when installing M.2 PCIe SSD into M2_3.
    M.2 4 x M.2 slots (Key M)
    M2_1 slot (from CPU):
    Supports PCIe 4.0/3.0 x4*
    Supports SATA 6Gb/s
    Supports 2280/22110 storage devices
    M2_2 slot:
    Chipset support mode (default, from Chipset ) - supports PCIe 3.0 x2
    CPU support mode (From CPU) - supports PCIe 4.0/3.0 x4 *
    Supports 2280 storage devices
    M2_3 slot:
    Chipset support mode (default, from Chipset ) - supports PCIe 3.0 x2
    CPU support mode (From CPU) - supports PCIe 4.0/3.0 x4 *
    Supports SATA 6Gb/s
    Supports 2280/22110 storage devices
    M2_4 slot:
    Supports PCIe 3.0 x4
    Supports 2280 storage devices

    * M.2 specifications may vary depending on the CPU installed.
    SATA RAID 0/1/10
    Onboard Video
    Onboard Video Chipset Supported only by CPU with integrated graphic:
    1 x HDMI 2.1 port, supporting a maximum resolution of 4096x2160 @120 Hz 1 2
    Maximum shared memory of 16GB

    1. Available for the processor with integrated graphics.
    2. Graphics specifications may vary depending on the CPU installed.
    Onboard Audio
    Audio Chipset Realtek ALC1220P Codec
    Audio Channels 7.1-Channel High Definition Audio
    Supports S/PDIF output
    Onboard LAN
    LAN Chipset Realtek RTL8125B
    Max LAN Speed 2.5Gbps
    Wireless LAN Intel Wi-Fi 6 AX200
    The Wireless module is pre-installed in the M.2 (Key-E) slot
    Supports MU-MIMO TX/RX, 2.4GHz/5GHz (160MHz) up to 2.4Gbps
    Supports 802.11 a/ b/ g/ n/ ac/ ax
    Bluetooth Supports Bluetooth 5.1
    Rear Panel Ports
    Back I/O Ports 4 x USB 3.1 Gen 1
    USB 3.0 4 x USB 3.0
    Internal I/O Connectors
    Onboard USB 1 x USB 3.2 Gen 2 10Gbps 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)
    Other Connectors 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 connectors
    2 x 3-pin RAINBOW LED connectors
    1 x 3-pin CORSAIR LED connector
    1 x TPM module connector
    1 x Clear CMOS jumper
    1 x Power button
    1 x Reset button
    Physical Spec
    Form Factor ATX
    LED Lighting RGB
    Dimensions (W x L) 12.0" x 9.6"
    Power Pin 1 x 24-pin ATX main power connector
    2 x 8-pin ATX 12V power connector
    1 x 6-pin PCIE power connector
    Software Feature
    Windows 11 Supported
    Features
    Features 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, Dual Channel 5300(OC) MHz+ (MAX5800).
    Quadruple M.2 Connectors: Maximum onboard 4 x M.2 slots, support the latest Gen 4 solution with up to 64GB/s bandwidth for maximum transfer speed.
    Extreme Power Design: Direct 14+2 phases with 90A Power Stage and dual CPU power connectors to unleash your true power.
    Premium Thermal Solution: Aluminum Cover 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.
    2.5G LAN with LAN Manager and Intel Wi-Fi 6 AX Solution: Upgraded network solution for professional and multimedia use. Delivers a secure, stable and fast network connection.
    Lightning Fast Game experience: PCIe 4.0, Lightning Gen 4 x4 M.2 with M.2 double-side Shield Frozr, AMD Turbo USB 3.2 GEN 2.
    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.
    Pre-installed I/O Shield: Better EMI protection and more convenience for installation.
    Additional Information
    Date First Available March 10, 2025

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