PRO B850M-A WIFI offers a simple design with a harmonious silver color scheme that perfectly matches both white and black PC builds. It is engineered with many exclusive features of MSI, a Wi-Fi 7 with EZ Antenna, 5G LAN, PCIe 5.0 M.2 with EZ M.2 Shield Frozr II, and Supplemental PCIe Power, ready for the AMD Ryzen™ 9000 series processors.

BUSINESS ELEGANCE

The PRO Series is tailored to professionals from all walks of life. The lineup features impressive performance and high quality, while aiming to provide users incredible experience. Users who care about productivity and efficiency can definitely count on the MSI PRO Series to assist you with multitasking and increasing efficiency.

Exclusive Features

Connectivity

Thermal Solution

MSI motherboards are designed with advanced hardware and technology, well-supporting the demanding computing usage of gaming and AI. Moreover, we also introduce AI to MSI Center and BIOS, making everything more effortless than before.

Extended Heatsink

Extended Heatsink enlarges the surface of heat dissipation and maintain the performance at heavy loads.

M.2 Shield Frozr

Strengthened M.2 thermal solution helps keep M.2 SSD safe and ensures incredible performance.

7W/mK Thermal Pad & Additional Choke Pad

High-quality 7W/mK MOSFET thermal pads and additional choke thermal pads ensure stable performance when all cores are runnging at high speed.

Enlarged Chipset Heatsink

The enlarged heatsink is designed to reduce dust and noise and capable of maintaining high efficiency of heat dissipation.

Specification

Chipset

• AMD B850 Chipset

Processor (CPU)

• Supports:
  • AMD Ryzen™ 9000 Series
  • AMD Ryzen™ 8000 Series
  • AMD Ryzen™ 7000 Series
• Socket: AM5

Memory

• 4 x DDR5 UDIMM slots
• Maximum capacity: 256GB
• Memory speeds:
  • 8200 – 5600 MT/s (OC)
  • 5600 – 4800 MT/s (JEDEC)
• Overclocking (Ryzen™ 9000 Series):
  • 1DPC 1R: up to 8200+ MT/s
  • 1DPC 2R: up to 6400+ MT/s
  • 2DPC 1R: up to 6400+ MT/s
  • 2DPC 2R: up to 6000+ MT/s
• Supports:
  • AMD EXPO™ (Memory Overclocking)
  • Dual-channel architecture
  • Non-ECC, unbuffered memory
  • CUDIMM (Clock Driver bypass mode)

Graphics (Onboard)

• 1 x HDMI™ (HDMI 2.1, up to 4K @ 60Hz)
• 1 x DisplayPort (DP 1.4, up to 4K @ 60Hz)
• Requires CPU with integrated graphics

Expansion Slots

• 1 x PCIe 5.0 x16 slot (CPU)
• 1 x PCIe 4.0 x4 slot (Chipset)
• 1 x PCIe 3.0 x1 slot (Chipset)

PCIe Bandwidth (CPU dependent)

• PCIe 5.0 x16 (Ryzen™ 9000 / 7000)
• PCIe 4.0 x8 (Ryzen™ 8700 / 8600 / 8400)
• PCIe 4.0 x4 (Ryzen™ 8500 / 8300)

Storage

• 2 x M.2 slots:
  • M.2_1 (CPU): PCIe 5.0 x4 (2280/2260)
  • M.2_2 (CPU): PCIe 4.0 x4 (2280/2260)
• 4 x SATA 6Gb/s ports

M.2 Performance Notes

• M.2_1:
  • PCIe 5.0 x4 (Ryzen™ 9000 / 7000)
  • PCIe 4.0 x4 (Ryzen™ 8000)
• M.2_2:
  • PCIe 4.0 x4
  • PCIe 4.0 x2 (Ryzen™ 8500 / 8300)

RAID Support

• SATA: RAID 0 / 1 / 10
• M.2 NVMe: RAID 0 / 1

USB Connectivity

Rear Ports

• 3 x USB 5Gbps (Type-A)
• 3 x USB 10Gbps (Type-A)
• 2 x USB 10Gbps (Type-C)

Front Ports

• 4 x USB 2.0
• 2 x USB 5Gbps (Type-A)
• 1 x USB 10Gbps (Type-C)

Networking

• Realtek® 8126VB 5G LAN

Wireless & Bluetooth

• Wi-Fi 7 (pre-installed module)
  • Tri-band: 2.4GHz / 5GHz / 6GHz
  • Speed up to 2.9Gbps
  • MU-MIMO + MLO support
• Bluetooth® 5.4

Audio

• Realtek® ALC897
• 7.1-Channel High Definition Audio

Internal I/O Connectors

• Power:
  • 1 x 24-pin ATX
  • 2 x CPU power connectors
  • 1 x PCIe 8-pin power
• Cooling:
  • 1 x CPU fan header
  • 1 x Pump/System fan
  • 3 x System fan headers
• RGB & Lighting:
  • 3 x Addressable Gen2 RGB headers
  • 1 x RGB LED header
• Front Panel & Misc:
  • 2 x front panel headers
  • 1 x chassis intrusion header
  • 1 x front audio header
  • 1 x COM port header
  • 1 x JDASH tuning controller header
  • 1 x TPM header (TPM 2.0)
• USB headers:
  • 4 x USB 2.0 ports
  • 2 x USB 5Gbps ports
  • 1 x USB 10Gbps Type-C header

LED Features

• 4 x EZ Debug LEDs
• 1 x EZ Memory Detection LED

Back Panel I/O

• Clear CMOS Button
• Flash BIOS Button
• DisplayPort
• HDMI™
• USB 10Gbps (Type-A & Type-C)
• USB 5Gbps (Type-A)
• 5G LAN (RJ-45)
• Wi-Fi / Bluetooth antenna connectors
• Audio jacks

Operating System Support

• Windows® 11 (64-bit)

Form Factor

• micro-ATX (mATX)
• Dimensions: 243.84 mm x 243.84 mm