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ATX motherboard with black heatsinks and silver accents, AM5 socket, four DDR5 slots, three M.2 covers, rear I/O shield

MSI

MSI MAG B850 GAMING PLUS MAX WIFI + Ryzen 9 9950X AMD motherboard combo

SKU CH-3CEZ-X85N8

AM5 motherboard and 16-core Ryzen 9 9950X combo with DDR5 up to 8200 MT/s, PCIe 5.0 M.2, Wi-Fi 7 and 5G LAN

  • CPU socketAM5
  • ChipsetAMD B850
  • Form factorATX
  • Memory slot count4 × 288pin (DDR5)
  • Max supported RAM256 GB
  • Memory channelsDual Channel
  • Future-ready CPU upgrades supported by 64MB BIOS ROM
  • Maximum CPU performance unlocked through OC Engine clock generator
  • Effortless graphics card swaps with EZ PCIe Release button
  • Ultra-fast storage via PCIe 5.0 delivering 128GB/s bandwidth
  • High-speed networking with 5G LAN and Wi-Fi 7 2.9Gbps

AM5 Motherboard and CPU Combo

This package pairs the MSI MAG B850 GAMING PLUS MAX WIFI motherboard with the AMD Ryzen 9 9950X processor. The board uses the AMD B850 chipset and an AM5 socket. It supports DDR5 memory up to 256 GB across four slots. The CPU delivers 16 cores and 32 threads based on the Zen 5 architecture with a 5.7 GHz max boost clock.

Ideal for High-End Builds

The combo suits builders who need maximum multi-threaded performance for rendering, compilation or heavy multitasking. The 5G LAN and Wi-Fi 7 provide fast network connectivity. Users planning a basic office PC or a compact ITX system should consider a smaller, less expensive platform.

DDR5 Memory Speed Decides Fit

The motherboard allows DDR5 overclocking up to 8200 MT/s while the processor officially supports 5600 MT/s. If your workflow depends on guaranteed memory speeds above the CPU rated specification, verify stability requirements before purchasing.

How it compares

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

Price $852.99
Pricier than about 81% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Model nameMAG B850 GAMING PLUS MAX WIFI+R9 9950X
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

Will my existing DDR5 memory kits work with this motherboard and CPU combination?

The board has four 288‑pin DDR5 slots supporting up to 256 GB in dual‑channel mode, and the Ryzen 9 9950X officially runs DDR5‑5600 while the motherboard can push memory to 8200+ MT/s when overclocked.

Can I install a PCIe 5.0 graphics card and still use the EZ PCIe Release button?

Yes — the primary PCI Express 4.0 x16 slot includes the EZ PCIe Release latch, and the board also provides a PCI Express 3.0 x16 slot plus three M.2 connectors, one of which is a PCIe 5.0 x4 slot.

What wireless and wired network speeds can I expect from the onboard controllers?

The integrated Wi‑Fi 7 controller offers up to 2.9 Gbps over a 160 MHz channel, and the Realtek 8126 LAN chip delivers 5 Gbps wired throughput.

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