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MSI PRO B850M-P WIFI micro-ATX motherboard with Ryzen 9 9900X CPU in AM5 socket

MSI

MSI PRO B850M-P WIFI + Ryzen 9 9900X AMD motherboard CPU combo

SKU CH-K69T-HA01G

Pre-built AM5 platform pairing a B850 micro-ATX board with Wi-Fi 7 and Bluetooth 5.4 alongside a 12-core 24-thread Zen 5 CPU reaching 5.6 GHz boost

  • CPU socketAM5
  • ChipsetAMD B850
  • Form factorMicro ATX
  • Memory slot count4 × 288pin (DDR5)
  • Max supported RAM256 GB
  • Memory channelsDual Channel

CPU +Ryzen 9 9900X

  • Ready for next-gen builds with AM5 socket and B850 chipset
  • 12-core Ryzen 9 9900X hits 5.6 GHz max boost for heavy workloads
  • DDR5 memory scales to 8200 MT/s across four slots for high bandwidth
  • Wi-Fi 7 and 5G LAN deliver low-latency wireless and wired connectivity
  • 4K 60 Hz output via HDMI 2.1 and DisplayPort 1.4 for sharp visuals

Ready AM5 platform

The MSI PRO B850M-P WIFI motherboard arrives paired with a Ryzen 9 9900X processor, delivering a complete Socket AM5 foundation. The 12-core, 24-thread CPU runs at up to 5.6 GHz max boost and includes 64 MB L3 cache. The B850 chipset enables PCIe 5.0 on the primary x16 slot and provides four SATA 6Gb/s ports.

Connectivity and memory headroom

Onboard Wi-Fi 7 and Bluetooth 5.4 join a Realtek 8126 5G LAN port for flexible networking. Video outputs comprise HDMI 2.1 and DisplayPort 1.4, both requiring processor graphics for 4K at 60 Hz. Four DDR5 DIMM slots support dual-channel kits up to 256 GB and speeds of 8200 MT/s when overclocked, while the CPU itself guarantees DDR5-5600 operation.

Builders who want a pre-validated AM5 core

This combo suits enthusiasts assembling a high-throughput workstation or gaming rig who prefer a matched motherboard and CPU without separate compatibility checks. The micro-ATX form factor fits compact cases, and the unlocked multiplier invites manual tuning. Buyers needing a bundled cooler, additional PCIe 5.0 M.2 slots, or a smaller ITX footprint should evaluate alternative platforms.

How it compares

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

Price $584.99
Pricier than about 69% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Model namePRO B850M-P WIFI+R9 9900X
Part numberPRO B850M-P WIFI+R9 9900X
Processor
CPU socketAM5
ChipsetAMD B850
Memory
Memory slot count4 × 288pin (DDR5)
Max supported RAM256 GB
Memory channelsDual Channel
Storage
SATA ports4 x SATA 6Gb/s
Connectivity
Ethernet controllerRealtek 8126 5G LAN
Wi-Fi standardWi-Fi 7 Solution
Bluetooth support5.4
Ports & slots
PCIe 5.0 x16 slots1 x PCI Express 5.0 x16
PCIe x1 slots3 x PCIe 3.0 x1 slots
HDMI ports1 x HDMI
Ethernet port1 x RJ45
DisplayPort connectors1 x DisplayPort
USB 3.1 ports2 x USB 5 Gbit/s Type-A
1 xUSB 10 Gbit/s Type-A
USB 2.0 ports4 x USB 2.0
USB-C ports1xUSB 10 Gbit/s Type-C
Audio jacks3 Ports
Onboard USB headers1 x AMD Ryzen 9 9900X CPU
1 x Shin-Etsu X-23-7868-2D (1.8g)
4 x USB 2.0
4 x USB 5 Gbit/s Type-A
1 x USB 10 Gbit/s Type-C
Size & build
Form factorMicro ATX

Other versions of this model

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Questions about this item

Will the 12‑core Ryzen 9 9900X require a cooler replacement later?

The CPU ships without a cooler, so an aftermarket air or liquid cooler must be purchased before first use and will remain the only cooling component needed.

What thermal limit appears first when the 12‑core 5.6 GHz boost runs continuously?

The 9900X will hit its factory thermal ceiling and throttle boost clocks once the cooler can no longer dissipate the sustained power draw.

How loud and hot does the Realtek 8126 5G LAN and Wi‑Fi 7 combo get under all‑day traffic?

The controller runs passively on the board; it adds negligible heat and no audible noise during continuous network load.

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