MSI 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
  • EZ DIY: EZ M.2 Shield Frozr II, EZ M.2 Clip II, EZ PCIe Clip II, and EZ Antenna
  • 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
  • Lightning Fast Game experience: PCIe 5.0 slot and Lightning Gen 5 x4 M.2
  • Audio Boost: Reward your ears with studio-grade sound quality for the most immersive gaming experience
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Specification Details
Chipset AMD B850
CPU Supports AMD Ryzen 9000 / 8000 / 7000 Series Desktop Processors
Socket AM5
Memory
Configuration 4x DDR5 UDIMM, Maximum Memory Capacity 256GB
Memory Support DDR5 8200 – 5600 (OC) MT/s / 5600 – 4800 (JEDEC) MT/s
Ryzen 9000 Series Max Overclocking Frequency 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
Features Supports AMD POR Speed and JEDEC Speed
Supports Memory Overclocking and AMD EXPO
Supports Dual-Channel Mode
Supports Non-ECC, Un-buffered Memory
Supports CUDIMM, Clock Driver Bypass Mode Only*
Notes * 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 depend on CPU and configuration. Visit https://www.msi.com/support/ for details.
Onboard Graphics
Ports 1x HDMI
Supports HDMI 2.1, maximum resolution 4K 60Hz*
1x DisplayPort
Supports DisplayPort 1.4, maximum resolution 4K 60Hz*
*Available only on processors featuring integrated graphics. Graphics specifications may vary depending on the CPU installed.
Expansion Slots
Slots 2x PCI-E x16 Slots
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 – PCIe 5.0 x16 (Ryzen 9000 / 7000)
– PCIe 4.0 x8 (Ryzen 8700 / 8600 / 8400)
– PCIe 4.0 x4 (Ryzen 8500 / 8300)
Audio
Codec Realtek ALC897
Channels 7.1-Channel High Definition Audio
Storage
Configuration 2x M.2
M.2_1 (From CPU): PCIe 5.0 x4, supports 2280/2260 devices
M.2_2 (From CPU): PCIe 4.0 x4, supports 2280/2260 devices
4x SATA 6G
M.2_1 Slot – PCIe 5.0 x4 (Ryzen 9000 / 7000)
– PCIe 4.0 x4 (Ryzen 8000)
M.2_2 Slot – PCIe 4.0 x4
– PCIe 4.0 x2 (Ryzen 8500 / 8300)
Notes * Please refer to the manual for M.2 SSD heatsink restrictions.
RAID
Support 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
Configuration 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
Port Realtek 8126VB 5G LAN
Internal I/O
Connectors 1x ATX Power (ATX_PWR)
2x CPU Power (CPU_PWR)
1x PCIE Power (8-pin)
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 (JARGB_V2)
1x RGB LED (JRGB)
1x TPM Pin Header (Supports TPM 2.0)
4x USB 2.0 Ports
2x USB 5Gbps Type-A Ports
1x USB 10Gbps Type-C Port
Wireless LAN & Bluetooth
Type Wi-Fi 7
Module Pre-installed in the M.2 (Key-E) Slot
Performance 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
Notes * 6GHz band support may depend on country regulations; Wi-Fi 7 is enabled in Windows 11 version 24H2.
** Bluetooth version may update; visit chipset vendor’s website for details. Bluetooth 5.4 ready in Windows 11 version 24H2.
LED Features
Indicators 4x EZ Debug LED
1x EZ Memory Detection LED
Back Panel Ports
Ports

  1. Clear CMOS Button
  2. DisplayPort
  3. USB 10Gbps Type-A
  4. USB 10Gbps Type-A
  5. USB 5Gbps Type-A
  6. 5G LAN
  7. Wi-Fi / Bluetooth
  8. Audio connectors
  9. Flash BIOS Button
  10. HDMI™
  11. USB 10Gbps Type-C
  12. USB 5Gbps Type-A
Operating System
Support Windows 11 64-bit
Box Content
INCLUDES
PCB INFO
mATX
243.84mmx243.84mm

Overview

MSI PRO B850M-A WIFI – Reliable Power, Professional Performance

The MSI PRO B850M-A WIFI is a compact yet powerful motherboard built to deliver stability, performance, and efficiency for professionals, creators, and enthusiasts. Supporting the latest AMD Ryzen™ 9000 / 8000 / 7000 Series Desktop Processors, it’s designed to handle demanding workloads and multitasking with ease.

Equipped with dual-channel DDR5 memory support up to 8200+ MT/s (OC), this board ensures ultra-fast responsiveness and smooth system performance. Its Direct 8+2+1 Power System featuring 60A Smart Power Stages (SPS) and 8+4-pin CPU power connectors guarantees consistent and clean power delivery, while Core Boost and Memory Boost technologies enhance overall performance and efficiency.

Built on a 6-layer PCB crafted from 2oz thickened copper and server-grade materials, the PRO B850M-A WIFI ensures excellent durability, heat dissipation, and signal integrity for long-term reliability.

The Frozr Guard design, with an extended heatsink, 7W/mK MOSFET thermal pads, additional choke pads, and EZ M.2 Shield Frozr II, keeps temperatures in check even under heavy loads, ensuring stable, uninterrupted performance.

For next-gen speed, the board includes a PCIe 5.0 slot and Lightning Gen 5 x4 M.2, allowing lightning-fast data transfer for NVMe SSDs and GPUs. The 5G LAN and Wi-Fi 7 solutions provide secure, stable, and ultra-fast connectivity for professional use, streaming, and gaming.

With EZ DIY features such as EZ M.2 Shield Frozr II, EZ M.2 Clip II, EZ PCIe Clip II, and EZ Antenna, assembling and upgrading your system becomes faster and easier. Audio Boost technology further enhances the experience by delivering rich, studio-grade sound for immersive entertainment and gaming.

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