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Rectangular ATX motherboard in matte black with silver heatsinks and a full I/O shield

MSI

MSI MEG B550 UNIFY AMD motherboard

SKU CH-8DW4-8DSM6

ATX board for Socket AM4 Ryzen 5000, 3000 and 4000 G-Series CPUs with B550 chipset, dual-channel DDR4 up to 5300 MHz, 128 GB capacity, 2.5 Gbps LAN, 7.1 audio and 10 Gbps USB 3.2 Gen 2 ports

  • CPU Socket TypeSocket AM4
  • CPU TypeSupports AMD Ryzen™ 5000 & 3000 Series desktop processors (n
  • ChipsetAMD B550
  • Memory StandardSupports dual-channel DDR4 1866-5300MHz memory
  • Maximum Memory Supported128GB
  • PCI SlotsAMD Processor 1x PCIe 4.0/ 3.0 x16 slot (PCI_E1) AMD B550 Ch
  • Supports AMD Ryzen 5000 and 3000 series processors via Socket AM4
  • Dual-channel DDR4 memory up to 5300 MHz with 128 GB maximum capacity
  • Primary PCIe 4.0 x16 slot for graphics cards plus secondary PCIe 3.0 x16 slot at x4 speed
  • Realtek ALC1220P codec delivers 7.1-channel high-definition audio with S/PDIF output
  • Realtek RTL8125B controller provides 2.5 Gbps LAN connectivity

Socket AM4 platform

The MSI MEG B550 UNIFY motherboard uses the AMD B550 chipset and a Socket AM4 interface. It supports AMD Ryzen 5000, 4000 G-Series and 3000 series desktop processors, excluding the Ryzen 5 3400G and Ryzen 3 3200G models. The board targets builders who want a full-size ATX foundation for high-end CPUs without moving to a newer socket generation.

128GB DDR4 headroom

Four memory slots accept dual-channel DDR4 kits rated from 1866 to 5300MHz, with a maximum capacity of 128GB. The primary PCIe 4.0 x16 slot connects directly to the processor for current graphics cards, while the chipset supplies a second x16 slot running at x4 speed plus two x1 slots. Six SATA III ports and four M.2 interfaces provide plenty of storage lanes, though the chipset link limits total throughput when every slot is saturated.

ATX layout and rear I/O

The ATX form factor requires a compatible case and a standard 24-pin plus 8-pin CPU power connection. Rear I/O includes four USB 3.2 Gen 2 10Gbps ports, three Type-A and one Type-C, driven by the processor. An internal USB 3.2 Gen 2 Type-C header and additional 5Gbps headers come from the chipset. A Realtek RTL8125B controller delivers 2.5Gbps wired networking, while the Realtek ALC1220P codec handles 7.1-channel audio with S/PDIF output.

Puntos fuertes

  • Supports AMD Ryzen 5000 and 3000 series processors via Socket AM4
  • Dual-channel DDR4 memory up to 5300 MHz with 128 GB maximum capacity
  • Primary PCIe 4.0 x16 slot for graphics cards plus secondary PCIe 3.0 x16 slot at x4 speed
  • Realtek ALC1220P codec delivers 7.1-channel high-definition audio with S/PDIF output
  • Realtek RTL8125B controller provides 2.5 Gbps LAN connectivity

Especificaciones

BrandMSI
SeriesMSI MEG B550 UNIFY
ModelMSI MEG B550 UNIFY
CPU Socket TypeSocket AM4
CPU TypeSupports 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
ChipsetAMD B550
Memory StandardSupports dual-channel DDR4 1866-5300MHz memory
Maximum Memory Supported128GB
PCI SlotsAMD Processor
1x PCIe 4.0/ 3.0 x16 slot (PCI_E1)
AMD B550 Chipset
1x PCIe 3.0 x16 slot (PCI_E4), supports x4 speed
2x PCIe 3.0 x1 slots (PCI_E2 & PCI_E3)
SATA RAID6XSATA III interface, 4xM.2 interface
Audio ChipsetRealtek ALC1220P Codec
7.1-Channel High Definition Audio
Supports S/PDIF output
LAN Chipset1x Realtek RTL8125B 2.5Gbps LAN controller
Onboard USBAMD Processor
4x USB 3.2 Gen 2 10Gbps ports(3 Type-A ports and 1 Type-C port) on the back panel
AMD B550 Chipset
1x USB 3.2 Gen 2 10Gbps Type-C internal connector
2x USB 3.2 Gen 1 5Gbps ports are available through the internal USB 3.2 Gen 1 5Gbps connector
4x USB 2.0 ports on the back channel
AMD B550 chipset + USB 2.0 Hubs
4x USB 2.0 ports are available through the internal USB 2.0 connectors

Preguntas sobre este artículo

Will my existing DDR4-3200 kit run at its rated speed on the MEG B550 UNIFY?

The board supports dual-channel DDR4 from 1866 MHz up to 5300 MHz, so a 3200 MHz kit will operate at its rated frequency without issue.

How can I confirm the 2.5 Gbps LAN is active after building the system?

Open Windows Device Manager or your OS network settings; the Realtek RTL8125B adapter should show a link speed of 2.5 Gbps when connected to a compatible switch or router.

What cables and accessories come with the MEG B550 UNIFY and what must I source myself?

The box includes the motherboard, a CMOS battery, one SATA cable and the rear I/O shield; CPU cooler mounting hardware, additional SATA cables, M.2 screws and any Wi-Fi antenna are not supplied.

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