MSI PRO B850M-A WIFI DDR5 AMD Motherboard

PRO B850M-A WIFI

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.

DIRECT 8+2+1 POWER DESIGN

Unleash and sustain the maximum performance with a VRM design built with a total of 8+2+1 digital power phases. With 8+4-pin power connectors, PRO B850M-A WIFI is ready for the challenge of heavy-loading tasks.

DDR5 MEMORY SUPPORT WITH HIGH PERFORMANCE

A huge step of DDR performance enhancement with the latest DDR5 memory. Combines with dedicated SMT welding process and MSI Memory Boost technology, PRO B850M-A WIFI is ready to deliver the world-class memory performance.

Transient Voltage Suppressors (TVS)

Transient Voltage Suppressors (TVS) are safety devices used to protect against excessive voltage. All motherboard models of MSI are equipped with TVS. When the voltage abnormally rises, the TVS switches from a high-resistance state to a low-resistance state, diverting the excessive voltage to ground. This helps prevent circuit damage caused by high voltage.

HIGH-BANDWIDTH AND LOW-LATENCY NETWORK

MSI's premium network solution provides incredible data transfer speed for demanding users.

FAST AND FUTURE-READY STORAGE

MSI PRO series motherboards support all the latest storage standards, which allows users to connect any ultra-fast storage device. Start games faster, load levels faster and have a real advantage over your enemies.

BIOS

Software

audio boost

The Isolated Analogy Structure for Audio Connectors

To provide clear voice, MSI develops a unique structure – Isolated Analogy Structure. The external metal framework of the audio connectors is separated from the internal layout, which ensures the sound quality crisp.

 isolated onMSI Isolated Analogy Structure for Audio Connectors

* The image above is an illustrative reference. Please refer to specification pages for more details.

GLOW YOUR PC

Splash on some color and vibrant RGB lighting effects using Mystic Light utility of MSI Center, which has million colors and fancy LED effects. Enjoy the full control and creativity of your PC's lighting with one software.

PRO B850M-A WIFI

Supports AMD Ryzen™ 9000 / 8000 / 7000 Series Desktop Processors

Supports DDR5 Memory, Dual Channel DDR5 8200+ MT/s (OC)

Ultra Performance: Direct 8+2+1 Power System 60A SPS, 8+4-pin CPU power connectors, Core Boost, Memory Boost, 6-layer PCB made by 2oz thickened copper and server-grade level material

Frozr Guard: Extended Heatsink, MOSFET thermal pads rated for 7W/mK, additional choke thermal pads and EZ M.2 Shield Frozr II are built for high performance system and non-stop experience

EZ DIY: EZ M.2 Shield Frozr II, EZ M.2 Clip II, EZ PCIe Clip II, and EZ Antenna

Lightning Fast Game experience: PCIe 5.0 slot and Lightning Gen 5 x4 M.2

5G LAN with Wi-Fi 7 Solution: the latest solution for professional and multimedia use, delivering secure, stable, and high-speed networking and data transmission

Audio Boost: Reward your ears with studio grade sound quality for the most immersive gaming experience

Specifications

Chipset : AMD B850

CPU : Supports AMD Ryzen™ 9000/ 8000/ 7000 Series Desktop Processors

Socket AM5

Memory

4x DDR5 UDIMM, Maximum Memory Capacity 256GB

Memory Support DDR5 8200 - 5600 (OC) MT/s / 5600 - 4800 (JEDEC) MT/s

Ryzen™ 9000 Series Processors max. overclocking frequency:

• 1DPC 1R Max speed up to 8200+ MT/s

• 1DPC 2R Max speed up to 6400+ MT/s

• 2DPC 1R Max speed up to 6400+ MT/s

• 2DPC 2R Max speed up to 6000+ MT/s

Supports AMD POR Speed and JEDEC Speed

Supports Memory Overclocking and AMD EXPOTM

Supports Dual-Channel mode

Supports Non-ECC, Un-buffered memory

Supports CUDIMM, Clock Driver bypass mode only*

* CUDIMM support and POR boot frequency may vary by CPU series, with manual overclocking available after boot. Certain CPUs may fail to boot, but future BIOS updates will improve compatibility.

• The DIMM slots on this motherboard only have single-sided latches.

• Memory compatibility and supported speeds can vary depending on the CPU and memory configuration. For detailed information, please refer to the Memory Compatibility List available on the product’s Support page or visit https://www.msi.com/support/.

Onboard Graphics

1x HDMI™

Support HDMITM 2.1, maximum resolution of 4K 60Hz*

1x DisplayPort

Support DisplayPort 1.4, maximum resolution of 4K 60Hz*

*Available only on processors featuring integrated graphics. Graphics specifications may vary depending on the CPU installed.

Slot

2x PCI-E x16 slot

1x PCI-E x1 slot

PCI_E1 Gen PCIe 5.0 supports up to x16 (From CPU)

PCI_E2 Gen PCIe 3.0 supports up to x1 (From Chipset)

PCI_E3 Gen PCIe 4.0 supports up to x4 (From Chipset)

PCI_E1 slot

• Supports PCIe 5.0 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)

Audio

Realtek® ALC897

7.1-Channel High Definition Audio

Storage

2x M.2

M.2_1 Source (From CPU) supports up to PCIe 5.0 x4 , supports 2280/2260 devices

M.2_2 Source (From CPU) supports up to PCIe 4.0 x4 , supports 2280/2260 devices

4x SATA 6G

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

• Supports up to PCIe 4.0 x2 (For Ryzen™ 8500/ 8300 Series processors)

*Please refer to the manual for M.2 SSD heatsink restrictions.

RAID

Supports RAID 0, RAID 1, and RAID 10 for SATA storage devices

Supports RAID 0 and RAID 1 for M.2 NVMe storage devices

USB

4x USB 2.0 (Front)

3x USB 5Gbps Type A (Rear)

2x USB 5Gbps Type A (Front)

3x USB 10Gbps Type A (Rear)

2x USB 10Gbps Type C (Rear)

1x USB 10Gbps Type C (Front)

LAN : Realtek® 8126VB 5G LAN

Internal IO

1x Power Connector(ATX_PWR)

2x Power Connector(CPU_PWR)

1x Power Connector(PCIE_PWR 8pin)

1x CPU Fan

1x Combo Fan (Pump_Sys Fan)

3x System Fan

2x Front Panel (JFP)

1x Chassis Intrusion (JCI)

1x Front Audio (JAUD)

1x Com Port (JCOM)

1x Tuning Controller connector(JDASH)

3x Addressable V2 RGB LED connector (JARGB_V2)

1x RGB LED connector(JRGB)

1x TPM pin header(Support TPM 2.0)

4x USB 2.0 ports

2x USB 5Gbps Type A ports

1x USB 10Gbps Type C ports

WIRELESS LAN & BLUETOOTH Wi-Fi 7

The Wireless module is pre-installed in the M.2 (Key-E) slot

Supports MU-MIMO TX/RX, 2.4GHz/ 5GHz/ 6GHz* (160MHz) up to 2.9Gbps

Supports 802.11 a/ b/ g/ n/ ac/ ax/ be

Supports Bluetooth® 5.4**, MLO, 4KQAM

* 6GHz band support may depend on every country’s regulations and Wi-Fi 7 will be ready in Windows 11 version 24H2.

** The Bluetooth version may be updated, please refer to the Wi-Fi chipset vendor’s website for details. Bluetooth 5.4 will be ready in Windows 11 version 24H2.

LED FEATURE

4x EZ Debug LED

1x EZ Memory Detection LED

BACK PANEL PORTS

Clear CMOS Button

DisplayPort

USB 10Gbps Type-A

USB 10Gbps Type-A

USB 5Gbps Type-A

5G LAN

Wi-Fi / Bluetooth

Audio connectors

Flash BIOS Button

HDMI™

USB 10Gbps Type-C

USB 5Gbps Type-A

OPERATING SYSTEM : Support for Windows® 11 64-bit

BOX CONTENT

PCB Info : mATX 243.84mmx243.84mm