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ATX motherboard in black and silver with large heatsinks and rear I/O shield

MSI

MSI MAG B550 TOMAHAWK MAX WIFI Socket AM4 DDR4 128GB AMD motherboard

SKU CH-E3AX-39R1J

AM4 board with B550 chipset, dual-channel DDR4 up to 4866 MHz and 128 GB capacity, 2.5 Gbps and 1 Gbps LAN, Realtek ALC1200 7.1 audio, one PCIe 4.0 x16 slot, two M.2 and six SATA connectors.

  • 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 up to 128GB DDR4 for heavy multitasking
  • 5Gbps and 1Gbps dual LAN for flexible networking
  • PCIe 4.0 x16 slot enables high-speed GPU performance
  • Realtek ALC1200 delivers 7.1-channel high-definition audio
  • AM4 socket supports 3rd Gen Ryzen and future BIOS updates

AM4 Ryzen motherboard with 128 GB DDR4 limit

The MSI MAG B550 TOMAHAWK MAX WIFI fits Socket AM4 and supports third-generation Ryzen CPUs along with future Ryzen releases after a BIOS update. Dual-channel DDR4 runs at speeds from 1866 up to 4866 MHz and tops out at 128 GB total capacity. Two M.2 interfaces and six SATA ports provide ample storage connectivity for builders and upgraders.

Extended heatsinks and dual LAN with 2.5 Gbps

An extended heatsink design covers the VRM and chipset to keep temperatures steady under typical loads without adding fan noise. The board carries two Realtek controllers: an RTL8125B running at 2.5 Gbps and an RTL8111H at 1 Gbps, giving wired network flexibility for gaming or workstations. Power delivery remains stable through standard ATX connectors with no extra cables required.

Dual-channel DDR4 up to 4866 MHz and 128 GB

Memory support is the decisive spec: the board validates dual-channel DDR4 from 1866 MHz through 4866 MHz and caps at 128 GB across four slots. If your build needs that speed range and maximum capacity on AM4, this chipset delivers it; if you need more memory or a different socket, look elsewhere.

Highlights

  • Supports up to 128GB DDR4 for heavy multitasking
  • 5Gbps and 1Gbps dual LAN for flexible networking
  • PCIe 4.0 x16 slot enables high-speed GPU performance
  • Realtek ALC1200 delivers 7.1-channel high-definition audio
  • AM4 socket supports 3rd Gen Ryzen and future BIOS updates

Specifications

BrandMSI
SeriesMSI MAG B550 TOMAHAWK MAX WIFI
ModelMSI MAG B550 TOMAHAWK MAX WIFI
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 about this item

Does the board support a Ryzen 3rd Gen CPU without a BIOS update?

Yes, the board supports AM4 socket 3rd Gen AMD Ryzen processors out of the box. Future AMD Ryzen processors may require a BIOS update.

What is the maximum memory capacity and what speeds are supported?

The board supports up to 128GB of dual-channel DDR4 memory at speeds from 1866 to 4866 MHz.

How many SATA devices and M.2 drives can I connect?

You can connect up to six SATA III devices and two M.2 drives.

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