Overview

  • Processor compatibility
    Supports AMD Ryzen 9000/7000 Series Desktop Processor Socket AM5
  • Speed (memory speed supported)
    4 DIMMs, Dual Channel DDR5-8400+ MT/s (OC)
  • Lightning Gen 5
    The latest PCIe 5.0 solution with up to 128GB/s bandwidth for maximum transfer speed.
  • Wi-Fi 7
    The latest wireless solution with a new 320MHz channel, achieving a maximum transmission speed of 5.8Gbps, which is 2.4 times faster than Wi-Fi 6/6E.
  • Audio Boost 5
    Isolated audio with a high quality audio processor for the most immersive gaming experience

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Specifications

Capacity & configuration

Memory Type Supported
DDR5
Memory Slot Type
288-pin DIMM

Dimensions & weight

Product Name
MAG B850 TOMAHAWK MAX WIFI (Socket AM5) AMD B850 ATX DDR5 Wi-Fi 7 Motherboard
Product Length
304.10 millimeters
Product Width
243.86 millimeters
Product Weight
50 ounces

Features

Brand
MSI
Color
Black
Chipset
AMD B850
Chipset Compatibility
AMD
Form Factor
ATX
Processor Socket
Socket AM5 (LGA 1718)
Processor Compatibility
AMD Ryzen 9 9000 Series
Number of M.2 Slots
4
Number Of PCI-E x16 Slots
3
SATA Connector
4x SATA 6G
Wireless Connectivity
Bluetooth
Wireless Networking Standard
Wi-Fi 7
Wireless Standard
BE
USB Ports
8 x USB-A 2.0
Number of Audio Channels
7.1
Number Of Memory Slots
3
Maximum Memory Supported
256 gigabytes
Memory Format Supported
UDIMM
Memory Speeds Supported
4x DDR5, Maximum Memory Capacity 256GB
RAID Support
RAID 0
Year of Release
2025
UPC
824142395356

Power & warranty

Model Number
MAG B850 TOMAHAWK MAX WIFI

Warranty & protection

Included manufacturer warranty

See manufacturer documentation.

Register your product with the manufacturer within 30 days of delivery.

Warranty service

Manufacturer warranty claims are handled by the manufacturer. We are happy to help you find the right contact: (888) 419-6820.

Customer reviews

Write a review
Verified BuyerOct 26, 2026 · Verified purchase ★★★★★

Solid board, perfect for my 9800X3D - This motherboard has been rock solid. Building with it was easy, the BIOS is simple to use, and my DDR5-6000 EXPO profile worked right away. WiFi 7 is fast and stable, and it pairs great with my Ryzen 7 9800X3D. Plenty of USB ports and M.2 slots. Zero issues since day one.

GAGETOct 25, 2026 · Verified purchase ★★★★★

MSI mag b850 - Works really well I have had my pc for over a year and have had no problems at all

ADNANOct 23, 2026 · Verified purchase ★★★★★

It’s alright but sensitive to ram issues - So the board is fine. I’d like to give props to the staff at the christiansburg Best Buy. They helped me above and beyond their duty to find the right board, even applied a new discount to the new replacement board.

DaSupertroopOct 1, 2026 · Verified purchase ★★★☆☆

Didn't last very long - I purchased this motherboard in April 2026. While I was running Stable Diffusion to create some images. My computer just died. After testing switching out different parts I narrowed it down to the motherboard. I upgraded to ASUS ProArt and that is working much better.

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Questions & answers

Ask a question

Email [email protected] or call (888) 419-6820 during business hours.

Free U.S. shippingOn every order. Leaves our store in 1–2 business days, arrives in 3–5 business days.
Free returns for 30 daysNo restocking fee. We email you a prepaid return label.
We can install it tooOptional in-home delivery, installation and haul-away on large appliances.
Talk to our team(888) 419-6820 · Mon–Sat