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MSI

MSI MAG B850 TOMAHAWK MAX WIFI AMD motherboard with Ryzen 7 9700X CPU combo

SKU CH-8DZS-23T64

A motherboard and CPU combo with AM5 socket, DDR5 up to 8400 MT/s, PCIe 5.0 x16, M.2 Gen5, Wi-Fi 7, 5G LAN, and an 8-core 16-thread Ryzen 7 9700X processor

  • CPU socketAM5
  • ChipsetAMD B850
  • Form factorATX
  • Memory slot count4 × 288pin (DDR5)
  • Supported memoryUp to DDR5 8400+ MT/s (OC)
  • Max supported RAM256 GB
  • Ready-to-build combo with Ryzen 7 9700X CPU included
  • 8 cores and 16 threads reach 5.5 GHz max boost
  • DDR5 memory scales to 8400 MT/s overclocked
  • PCIe 5.0 x16 and Gen5 M.2 deliver 128 GB/s bandwidth
  • Wi-Fi 7 320 MHz channel plus 5 Gbps LAN for fast networking

Combo for AM5 builders

This bundle pairs a MAG B850 TOMAHAWK MAX WIFI board with a Ryzen 7 9700X processor. The CPU delivers 8 cores and 16 threads on Zen 5 architecture with a 5.5 GHz max boost and 40 MB cache. The board supports Ryzen 7000, 8000 and 9000 series chips on the AM5 socket. It targets gamers and creators who want a ready-matched platform.

EZ install extras change the build flow

EZ PCIe Release lets you unlock the graphics-card slot with one press. EZ M.2 Shield Frozr II removes the need for tools when fitting M.2 drives in 22110, 2280 or 2260 sizes. Wi-Fi 7 adds a 320 MHz channel for up to 5.8 Gbps throughput. The 5 Gbps LAN and Audio Boost 5 with Realtek ALC4080 complete the I/O set.

Straightforward install with one BIOS trade-off

The AM5 socket and tool-less M.2 shields keep assembly simple. Four DDR5 slots accept up to 256 GB at 8400 MT/s OC with Ryzen 9000 series. PCIe 5.0 x16 comes from the CPU. Note that using the chipset M.2 slot at Gen 4 x2 forces the third PCIe slot to x2 speed unless you disable that M.2 slot in BIOS.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $579.99
Pricier than about 69% of the 1,906 comparable items (median $224.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameMSI
Model nameMAG B850 TOMAHAWK MAX WIFI+R7 9700X
Processor
CPU socketAM5
ChipsetAMD B850
Memory
Memory slot count4 × 288pin (DDR5)
Supported memoryUp to DDR5 8400+ MT/s (OC)
Max supported RAM256 GB
Memory channelsDual Channel
ECC supportNon-ECC
Storage
SATA ports4 x SATA 6Gb/s
SATA and RAID supportSupports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices
Audio & video
Audio chipRealtek ALC4080
Sound channels7.1 Channels
Connectivity
Ethernet controllerRealtek 8126VB
Maximum network speed5 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
Ports & slots
PCIe 5.0 x16 slotsPCI_E1 Gen PCIe 5.0 supports up to x16 (From CPU)
PCIe x1 slotsPCI_E2 Gen PCIe 3.0 supports up to x1 (From Chipset)
Onboard USB headers4 x USB 2.0 ports
4 x USB 5 Gbit/s Type A ports
1 x USB 20 Gbit/s Type C ports
Power
Power connectors1 x Power Connector(ATX_PWR)
2 x Power Connector(CPU_PWR)
1 x Power Connector(PCIE_PWR 8pin)
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Compatibility
Windows 11 support64-bit
More details
Lighting4 x EZ Debug LED
1 x EZ Memory Detection LED

Questions about this item

Will the 80A SPS VRM require any maintenance or replacement under normal use?

The VRM is a solid-state power delivery component with no moving parts, so it does not need scheduled maintenance or periodic replacement.

What thermal limit appears first when the Ryzen 7 9700X runs at its 5.5 GHz max boost clock all day?

The CPU will hit its own thermal ceiling before the motherboard VRM or chipset become the limiting factor under sustained load.

How loud and hot does the board get when the 5G LAN and Wi-Fi 7 run continuously?

The LAN and Wi-Fi controllers are low-power chips that add minimal heat; system noise and temperature will be dictated by the CPU cooler and case airflow.

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