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Rectangular ATX motherboard in black and silver with silver heatsinks and black PCB

MSI

MSI MAG B550 TOMAHAWK AMD Motherboard

SKU CH-7SHE-SWQVX

Socket AM4 board with AMD B550 chipset, dual-channel DDR4 up to 4866 MHz, 128 GB max memory, 2.5 Gbps and 1 Gbps LAN, Realtek ALC1200 7.1 audio, PCIe 4.0 x16, two M.2 and six SATA III ports

  • CPU Socket TypeSocket AM4
  • CPU TypeSupports AM4 socket 3rd Gen AMD Ryzen processors, and future
  • ChipsetAMD B550
  • Memory StandardSupport dual-channel DDR4 1866/2133/2400/2667/2800/2933/3000
  • Maximum Memory Supported128GB
  • PCI Slots1x PCIe 4.0/ 3.0 x16 slot (PCI_E1) 1x PCIe 3.0 x16 slot (PCI
  • Supports 3rd Gen Ryzen CPUs with BIOS update for future processors
  • Dual-channel DDR4 up to 4866 MHz and 128 GB maximum capacity
  • PCIe 4.0 x16 slot plus PCIe 3.0 x16 at x4 speed for graphics and add-in cards
  • 5 Gbps and 1 Gbps dual LAN controllers for wired networking flexibility
  • Realtek ALC1200 codec delivers 7.1-channel high-definition audio with S/PDIF output

AM4 Platform for Ryzen Builds

The MSI MAG B550 TOMAHAWK is an ATX motherboard built around the AMD B550 chipset and Socket AM4. It supports 3rd Gen AMD Ryzen processors and future Ryzen CPUs with a BIOS update. Dual-channel DDR4 memory runs at speeds from 1866 up to 4866 MHz with a maximum capacity of 128GB.

Suited for High-Speed Storage and Multi-GPU Users

This board fits builders who need one PCIe 4.0 x16 slot for a modern graphics card and two M.2 interfaces for fast storage. Six SATA III ports add room for additional drives. Users requiring more than one full-speed PCIe 4.0 x16 slot or integrated Wi-Fi should consider other options.

PCIe 4.0 x16 Slot Decides GPU Bandwidth

The primary PCI_E1 slot delivers PCIe 4.0 x16 bandwidth when paired with a compatible Ryzen CPU. The second x16 slot operates at PCIe 3.0 x4 speed. This distinction determines whether a graphics card can use the full 4.0 link or is limited to 3.0 throughput.

Points forts

  • Supports 3rd Gen Ryzen CPUs with BIOS update for future processors
  • Dual-channel DDR4 up to 4866 MHz and 128 GB maximum capacity
  • PCIe 4.0 x16 slot plus PCIe 3.0 x16 at x4 speed for graphics and add-in cards
  • 5 Gbps and 1 Gbps dual LAN controllers for wired networking flexibility
  • Realtek ALC1200 codec delivers 7.1-channel high-definition audio with S/PDIF output

Caractéristiques

BrandMSI
SeriesMSI MAG B550 TOMAHAWK
ModelMSI MAG B550 TOMAHAWK
CPU Socket TypeSocket AM4
CPU TypeSupports AM4 socket 3rd Gen AMD Ryzen processors, and future AMD Ryzen processors with BIOS update
ChipsetAMD B550
Memory StandardSupport dual-channel DDR4 1866/2133/2400/2667/2800/2933/3000/3066/3200/3466/3600/3733/3866/4000/4133/4266/4400/4533/4600/4733/4800/4866 + MHz memory
Maximum Memory Supported128GB
PCI Slots1x PCIe 4.0/ 3.0 x16 slot (PCI_E1)
1x PCIe 3.0 x16 slot (PCI_E3), supports x4 speed
2x PCIe 3.0 x1 slots
SATA RAID2XM.2 interface, 6xSATA III interface
Audio ChipsetRealtek ALC1200 Codec
7.1-Channel High Definition Audio
Supports S/PDIF output
LAN Chipset1x Realtek RTL8125B 2.5Gbps LAN controller
1x Realtek RTL8111H 1Gbps LAN controller
Onboard USBAMD 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)
6x USB 2.0 ports (2 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

Questions sur cet article

What case size and CPU cooler clearance does the ATX board with 128GB DDR4 support need?

The board uses standard ATX dimensions, so it fits any ATX or larger case. CPU cooler clearance depends on the case and the cooler height spec, not the motherboard itself.

How do I install a Ryzen processor on the Socket AM4 and which step is often missed?

Lift the AM4 retention arm, align the gold triangle on the processor with the socket marker, place the CPU gently, lower the arm, then apply thermal paste before mounting the cooler — skipping the paste is the common error.

When will the CMOS battery and SATA cables need replacement on this board?

The included CMOS battery typically lasts several years; replace it when the system loses date or BIOS settings. SATA cables only need changing if a drive becomes unstable or the connector is damaged.

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