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Micro-ATX motherboard with AM5 socket CPU installed, dark PCB and silver heatsinks

MSI

MSI PRO B850M-P WIFI + Ryzen 7 9700X AMD motherboard combo

SKU CH-S2KX-KCS4Q

B850 Micro-ATX board paired with an 8-core, 16-thread Ryzen 7 9700X reaching 5.5 GHz boost

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

CPU +Ryzen 7 9700X

  • Ryzen 7 9700X delivers 8 cores and 16 threads for high multi-thread throughput
  • AM5 socket supports Ryzen 7000, 8000 and 9000 series processors for upgrade flexibility
  • B850 chipset provides PCIe 5.0 x16 slot and DDR5 8200 MT/s overclocking headroom
  • Wi-Fi 7 and Bluetooth 5.4 plus Realtek 8126 5G LAN give fast wireless and wired connectivity
  • Four SATA 6Gb/s ports and multiple USB 5Gbps, 10Gbps Type-A and Type-C connections cover storage and peripherals

Combo foundation

The MSI PRO B850M-P WIFI motherboard is paired with the AMD Ryzen 7 9700X processor in a single Micro ATX package. The board uses the B850 chipset on the AM5 socket and supports Ryzen 7000, 8000 and 9000 series CPUs. It provides dual channel DDR5 memory across four slots up to 256 GB and 8200 MT/s when overclocked.

Builder fit

This combination suits builders who want a compact platform with integrated Wi-Fi 7, Bluetooth 5.4 and 5G LAN for modern connectivity. The single PCI Express 5.0 x16 slot and three PCIe 3.0 x1 slots limit expansion cards, so users needing multiple full speed add in cards should look at full size ATX alternatives.

Deciding spec

The CPU delivers 8 cores and 16 threads based on Zen 5 architecture with a 5.5 GHz max boost clock and 40 MB cache. It supports DDR5 5600 memory natively and is unlocked for overclocking, making the processor the key factor in whether this combo meets performance targets.

How it compares

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

Price $485.99
Pricier than about 65% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Model namePRO B850M-P WIFI+R7 9700X
Part numberPRO B850M-P WIFI+R7 9700X
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 7 9700X 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

How loud and hot does the Ryzen 7 9700X run during all-day workloads?

The 8-core, 16-thread CPU has a 65 W base TDP and a 5.5 GHz max boost clock, so a quality air cooler keeps temperatures and fan noise low under sustained loads.

What memory and graphics must I already own for this combo to post?

You need DDR5 modules — up to 256 GB across four slots — and a discrete graphics card, because the Ryzen 7 9700X has no integrated GPU to drive the HDMI 2.1 or DisplayPort 1.4 outputs.

Will my PCIe 3.0 x1 add-in cards and SATA 6 Gb/s drives work on the B850 board?

Yes, the board provides three PCIe 3.0 x1 slots and four SATA 6 Gb/s ports, so older expansion cards and drives connect directly without adapters.

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