MSI
MSI MAG X870 Tomahawk WiFi
AM5 · X870 · ATX
8.0
$280Nov 9
MSI MAG B850 Tomahawk Max WiFi
B850 ATX board with Wi-Fi 7, 5Gb LAN, two Gen5 M.2 slots and 22110 support.
- AM5
- B850
- ATX
- DDR5
- 4
PCPR score
7.9
Good
Best price we’ve seen
$230Nov 9
Checked recently. Confirm at the retailer.
R1
The short version
The MAG B850 Tomahawk Max WiFi is MSI's mainstream-premium B850 ATX board. It offers a PCIe 5.0 x16 slot, two PCIe 5.0 and two PCIe 4.0 M.2 slots, Wi-Fi 7, 5Gb Ethernet and three rear USB-C ports. It has no USB4, so buyers wanting 40Gbps ports should look at X870 boards. A good fit for Ryzen 9000 builds that want fast storage without X870 pricing.
Pros
- Two PCIe 5.0 x4 M.2 slots
- Wi-Fi 7 and 5Gb LAN
- Three USB-C ports on the rear
- Flash BIOS button
Cons
- No USB4
- M.2_3 runs at PCIe 4.0 x2 only
- Single LAN port
Best for
- Ryzen 9000 builds on a B850 budget with fast storage
J3
Full specifications
Core
- Socket
- AM5
- Chipset
- B850
- Form factor
- ATX
Memory
- Memory type
- DDR5
- Memory slots type
- DIMM
- Memory slots
- 4
- Max memory
- 256 GB
- Max memory speed (OC)
- 8,400 MT/s
Expansion
- M.2 slots
- 4
- M.2 PCIe 5.0 slots
- 2
- M.2 PCIe 4.0 slots
- 2
- M.2 PCIe 3.0 slots
- 0
- Supports M.2 22110
- Yes
- SATA ports
- 4
- PCIe x16 slots
- 1
- Primary PCIe slot version
- 5.0
- PCIe x4 slots
- 1
- PCIe x1 slots
- 1
Connectivity
- Wi-Fi
- Wi-Fi 7
- Bluetooth
- 5.4
- Ethernet speed
- 5 GbE
- Ethernet ports
- 1
Ports & I/O
- USB4 / Thunderbolt ports
- 0
- Rear USB-C ports
- 3
- Rear USB-A ports
- 7
- Front USB-C header
- Yes
- USB 3 headers
- 2
- USB 2 headers
- 2
- HDMI outputs (iGPU)
- 1
- DisplayPort outputs (iGPU)
- 0
Cooling
- Fan headers
- 8
- ARGB headers (5V)
- 3
- RGB headers (12V)
- 1
Power
- CPU power
- 2 x 8-pin
Fit
- Back-connect (BTF / Project Zero)
- No
Features
- BIOS flashback
- Yes
Physical
- Color
- Black
Compatibility notes
- PCI_E3 drops to x2 when M2_3 is populated.
- Supports CUDIMM in clock-driver bypass mode only.
P1
Where to buy
Best Buy
Seen Nov 9, 2026
$229.99
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MSI official page
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AV1
Video reviews
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R9
Common questions
Does it support Ryzen 9000X3D?
Yes, MSI lists support for Ryzen 9000, 8000 and 7000 desktop CPUs on AM5; a Flash BIOS button enables updating without a CPU.
Does it have USB4?
No. Rear USB-C ports are 10Gbps, with a front-panel 20Gbps Type-C header.
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