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Rectangular ATX motherboard in dark grey with silver heatsinks and black slots

MSI

MSI PRO B850-S WIFI6E AMD motherboard

SKU CH-GDHK-6WE9C MPN PRO B850-S WIFI6E

ATX motherboard with AM5 socket, AMD B850 chipset, DDR5 up to 8200 MT/s, PCIe 5.0 M.2, 2.5G LAN and Wi-Fi 6E

  • ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B850
  • Form factorATX
  • CPU socketAM5
  • Memory slot count4 × 288pin (DDR5)
  • Supported memorySupport DDR5 8200–5600 (OC) MT/s / 5600–4800 (JEDEC) MT/s

Model PRO B850-S WIFI6E

  • Supports AMD Ryzen 9000, 8000 and 7000 series processors via AM5 socket
  • DDR5 memory up to 8200 MT/s overclocked across four slots with 256 GB maximum capacity
  • PCIe 5.0 x4 M.2 slot from CPU for fastest storage performance
  • 5G LAN and Wi-Fi 6E provide high-speed wired and wireless networking
  • 12+2+1 Duet Rail power system with 7 W/mK thermal pads keeps VRM cool under load

Socket AM5 for Ryzen 7000 8000 9000

The MSI PRO B850-S WIFI6E is an ATX motherboard built on the AMD B850 chipset for Socket AM5 processors. It supports Ryzen 7000 8000 and 9000 series CPUs with a 12 Duet Rail power system using P-PAK components and dual 8-pin CPU power connectors. Four DDR5 slots accept up to 256 GB running at 8200 MT/s OC with AMD EXPO profiles.

EZ M.2 Clip II and EZ PCIe Clip II

Tool-free latches secure M.2 drives and the primary PCIe 4.0 x16 graphics card without screws. The primary M.2 slot runs at PCIe 5.0 x4 from the CPU and accepts 22110 and 2280 lengths; a second CPU-linked slot runs at PCIe 4.0 x4 for 2280 and 2260 drives. A chipset-linked PCIe 4.0 x4 slot and a PCIe 3.0 x1 slot provide additional expansion.

Check CPU generation for lane allocation

Ryzen 9000 and 7000 series deliver PCIe 4.0 x16 on the top slot while Ryzen 8700 8600 8400 series operate at x8. Verify your cooler clears the VRM heatsink and 7 W/mK thermal pads. Ensure the power supply provides two 8-pin CPU connectors. The board includes 2.5G LAN Wi-Fi 6E Realtek ALC897 audio four SATA 6Gb/s ports and RAID support for SATA and M.2 NVMe arrays.

How it compares

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

Price $120.99
Cheaper than about 69% of the 1,906 comparable items (median $224.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameMSI
Model namePRO B850-S WIFI6E
Processor
ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
CPU socketAM5
ChipsetAMD B850
Memory
Memory slot count4 × 288pin (DDR5)
Supported memorySupport DDR5 8200–5600 (OC) MT/s / 5600–4800 (JEDEC) MT/s
Max supported RAM256 GB
Memory channelsDual Channel
Memory profilesAMD EXPO
ECC supportNon-ECC
BufferingUn-buffered
Storage
SATA ports4 x SATA 6Gb/s
M.2 slotsM.2_1 Source (From CPU) supports up to PCIe 5.0 x4 , supports 22110/2280 devices
M.2_2 Source (From CPU) supports up to PCIe 4.0 x4 , supports 2280/2260 devices
M2_1 slot
- Supports up to PCIe 5.0 x4 (For Ryzen 9000/ 7000 Series processors)
- Supports up to PCIe 4.0 x4 (For Ryzen 8000 Series processors)
M2_2 slot
- Supports up to PCIe 4.0 x4 (For Ryzen 9000/ 8700/ 8600/ 8400/ 7000 Series processors)
- Supports up to PCIe 4.0 x2 (For Ryzen 8500/ 8300 Series processors)
SATA and RAID supportSupports RAID 0, RAID 1, and RAID 10 for SATA storage devices
Supports RAID 0 and RAID 1 for M.2 NVMe storage devices
Audio & video
Audio chipRealtek ALC897
Sound channels7.1 Channels
Connectivity
Maximum network speed2.5 Gbit/s
Wi-Fi standardWi-Fi 802.11 ax
Bluetooth support5.3
Ports & slots
PCIe 4.0 x16 slotsPCI_E1 Gen PCIe 4.0 supports up to x16 (From CPU)
PCI_E1 slot
- Supports PCIe 4.0 x16 (For Ryzen 9000/ 7000 Series processors)
- Supports PCIe 4.0 x8 (For Ryzen 8700/ 8600/ 8400 Series processors)
- Supports PCIe 4.0 x4 (For Ryzen 8500/ 8300 Series processor)
PCIe x4 slotsPCI_E3 Gen PCIe 4.0 supports up to x4 (From Chipset)
PCIe x1 slotsPCI_E2 Gen PCIe 3.0 supports up to x1 (From Chipset)
Onboard USB headers4 x USB 2.0 ports
2 x USB 5 Gbit/s Type A ports
1 x USB 10 Gbit/s Type C ports
Power
Power connectors1 x Power Connector(ATX_PWR)
2 x Power Connector(CPU_PWR)
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Shipping weight1.45 kg
Package size343 × 274 × 76 mm
Compatibility
Windows 11 supportSupported
More details
Lighting4 x EZ Debug LED
1 x EZ Memory Detection LED

Other versions of this model

5 more in the same range

Questions about this item

How do I confirm the PRO B850-S WIFI6E is running DDR5 at the advertised 8200 MT/s after build?

Enter the BIOS and enable the AMD EXPO profile for your memory kit; the memory tab will then show the active speed at 8200 MT/s or the highest supported OC frequency for the installed modules.

What ships with the PRO B850-S WIFI6E and which key items are not included?

The box contains the ATX motherboard, I/O shield, Wi-Fi 6E antenna, SATA cables, EZ M.2 Clip II, EZ PCIe Clip II and documentation; CPU, DDR5 memory, M.2 NVMe drives, graphics card, power supply and chassis must be purchased separately.

Which M.2 slot should I use for a PCIe 5.0 NVMe drive on this board?

Install the drive in the M.2_1 slot sourced from the CPU; it supports PCIe 5.0 x4 and 22110 or 2280 form factors, while M.2_2 is limited to PCIe 4.0 x4.

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