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ATX motherboard in dark grey with silver heatsinks and included Ryzen 7 9700X CPU

MSI

MSI MAG B850 GAMING PLUS MAX WIFI AMD motherboard & Ryzen 7 9700X CPU Combo

SKU CH-AHSP-XGBWX

AM5 board with Wi-Fi 7, 5G LAN, triple M.2 and DDR5 up to 8200 MT/s paired with an 8-core 16-thread Ryzen 7 9700X boosting to 5.5 GHz

  • CPU socketAM5
  • ChipsetAMD B850
  • Form factorATX
  • Memory slot count4 × 288pin (DDR5)
  • Max supported RAM256 GB
  • Memory channelsDual Channel
  • Ready for future CPUs with 64MB BIOS ROM capacity
  • Faster GPU installs using EZ PCIe Release button
  • Triple M.2 slots with PCIe 5.0 speed and Shield Frozr cooling
  • 5G LAN plus Wi-Fi 7 for high-speed networking
  • 8-core Ryzen 7 9700X hits 5.5 GHz boost clock

Combo for AM5 gaming builds

This bundle pairs the MSI MAG B850 GAMING PLUS MAX WIFI motherboard with the AMD Ryzen 7 9700X processor. The board uses the B850 chipset on the AM5 socket and supports DDR5 memory up to 8200 MT/s. The CPU delivers 8 cores and 16 threads based on the Zen 5 architecture with a maximum boost clock of 5.5 GHz.

Thermals noise and power draw

The motherboard includes a 64 MB BIOS ROM and an OC Engine clock generator for stable overclocking headroom. M.2 Shield Frozr II heatsinks cover the three M.2 slots to manage SSD temperatures. Realtek ALC897 audio provides 7.1 channel output while the 5G LAN and Wi-Fi 7 with 160 MHz channels handle networking.

Upgrade path from older AM4 systems

Moving from an AM4 platform brings PCIe 5.0 x4 storage support and DDR5 memory bandwidth. The EZ PCIe Release button and tool-less M.2 shields simplify hardware swaps. The jump is worthwhile when you need 5.5 GHz boost clocks, 5 Gbps wired LAN and Wi-Fi 7 speeds up to 2.9 Gbps.

How it compares

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

Price $589.99
Pricier than about 69% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Model nameMAG B850 GAMING PLUS MAX WIFI+R7 9700X
Processor
CPU socketAM5
ChipsetAMD B850
Memory
Memory slot count4 × 288pin (DDR5)
Max supported RAM256 GB
Memory channelsDual Channel
ECC supportNon-ECC
BufferingUn-buffered
Storage
M.2 slots3 x M.2 (Support PCIe 5.0 x4, PCIe 4.0 x4, PCIe 4.0 x2)
Graphics
Onboard video chipDepends on installed processor
Audio & video
Audio chipRealtek ALC897
Sound channels7.1 Channels
Connectivity
Ethernet controllerRealtek 8126
Maximum network speed5 Gbit/s
Bluetooth supportYes
Ports & slots
PCIe 4.0 x16 slots1 x PCI Express 4.0 x16
PCIe 3.0 x16 slots1 x PCI Express 3.0 x16
Rear panel ports4 x USB 2.0
1 x USB 5 Gbit/s Type-A
1 x USB 10 Gbit/s Type-A
2 x USB 10 Gbit/s Type-C
1 x DisplayPort
Serial ports1
DisplayPort connectors1 x DisplayPort
Onboard USB headers4 x USB 5 Gbit/s + 4 x USB 2.0 + 1 x USB Type-C header, with USB 5 Gbit/s
Size & build
Form factorATX
Width and length243.84 mm × 304.8 mm
More details
LightingRGB

Questions about this item

How do I install the Ryzen 7 9700X into the AM5 socket and which step is often done wrong?

Lift the retention lever, align the gold triangle on the CPU with the socket marker, lower the chip without force, then close and lock the lever; the common mistake is pressing down on the processor before the lever is fully latched.

What maintenance or replacement will the board need later?

The 64 MB BIOS chip stores firmware that can be updated via USB for new CPU support, and the button cell on the board keeps the clock and settings alive when the system is off.

What limit appears first during sustained heavy loads?

The 5.5 GHz maximum boost clock on the 8 core 16 thread Ryzen 7 9700X will throttle under prolonged all core workloads if the cooler cannot dissipate the heat fast enough.

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