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Black ATX motherboard with silver heatsinks and AM5 socket

MSI

MSI MAG B850 TOMAHAWK MAX WIFI AMD AM5 ATX DDR5 Motherboard

SKU CH-C077-BZ504

ATX motherboard for AMD Ryzen CPUs on the B850 chipset with four DDR5 slots up to 256 GB, PCIe 5.0 x16 slot and Wi-Fi

  • CPU Socket TypeAM5
  • CPU TypeRyzen Series
  • Form FactorATX
  • AM5 socket supports latest Ryzen processors
  • PCI Express 5.0 x16 slot delivers high bandwidth for graphics
  • Four DDR5 slots enable up to 256GB memory capacity
  • ATX form factor fits standard desktop cases
  • Includes I/O shield, two SATA cables, M.2 hardware and Wi-Fi antennas

AM5 ATX Motherboard for Serious Gaming

The MSI MAG B850 TOMAHAWK MAX WIFI is an ATX motherboard built around the AMD B850 chipset and AM5 socket. It supports Ryzen series processors and DDR5 SDRAM across four memory slots with a maximum capacity of 256GB. A PCI Express 5.0 x16 slot provides high-bandwidth graphics connectivity, while integrated Wi-Fi and an RJ45 port handle networking.

Builders Choosing AMD AM5 and DDR5

This board suits builders assembling a new AMD platform who need four DDR5 slots and a full-size ATX layout for expansion cards. The PCIe 5.0 x16 slot accommodates modern graphics cards, and the included I/O shield, SATA cables, M.2 hardware and Wi-Fi antennas simplify assembly. Buyers requiring a smaller form factor or a different chipset feature set should consider other options.

PCI Express 5.0 x16 Graphics Slot

The single PCIe 5.0 x16 slot is the specification that determines whether this motherboard matches a build plan. It delivers the bandwidth needed for current high-performance GPUs and future-proofs the primary expansion lane. If a build requires multiple x16 slots or a different slot generation, this model will not fit the requirement.

Highlights

  • AM5 socket supports latest Ryzen processors
  • PCI Express 5.0 x16 slot delivers high bandwidth for graphics
  • Four DDR5 slots enable up to 256GB memory capacity
  • ATX form factor fits standard desktop cases
  • Includes I/O shield, two SATA cables, M.2 hardware and Wi-Fi antennas

Specifications

BrandMSI
ModelMAG B850 TOMAHAWK MAX WIFI
CPU Socket TypeAM5
CPU TypeRyzen Series
Form FactorATX

Questions about this item

What CPU and memory do I need to install for this AM5 board to work?

You need an AMD Ryzen AM5 processor and DDR5 memory modules; the board supports up to 256 GB across its four slots.

Will my existing PCIe 4.0 graphics card run at full speed in the PCIe 5.0 x16 slot?

Yes, the PCI Express 5.0 x16 slot is backward compatible, so a PCIe 4.0 card will operate at its native 4.0 speeds.

How can I verify the motherboard is functioning correctly after assembly?

Power on the system, enter the BIOS to confirm the CPU, all installed DDR5 modules, and any SATA or M.2 drives are detected, then boot into the OS and check Device Manager for the network controller and audio device.

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