MSI · Motherboard

MSI PRO B850M-A WIFI

B850 · AM5 · mATX · DDR5

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Chipset B850
Form factor mATX
Memory slots 4
Max memory 256 GB
Socket AM5
Memory type DDR5

MSI PRO B850M-A WIFI is a mATX and B850 chipset motherboard for AM5 processors and DDR5 memory. It came out in 2025.

Released: 2025-07-13
Socket: AM5

Specifications

Key specs

Chipset: B850
Form factor: mATX
Memory slots: 4
Max memory: 256 GB
Socket: AM5
Memory type: DDR5
Released: 2025-07-13
Part number: PRO B850M-A WIFI
EAN / UPC: 0824142425459

Processor

Processor manufacturer: AMD
Processor socket: Socket AM5
Compatible processor series: AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Supported processor sockets: Socket AM5

Memory

Supported memory types: DDR5-SDRAM
Number of memory slots: 4
Memory slots type: DIMM
Memory channels: Dual-channel
ECC сompatibility: Non-ECC
Supported memory clock speeds: 6000,6400,8200 MHz
Supported memory clock speed (max): 8200 MHz
Maximum internal memory: 256 GB

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Storage controllers

Supported storage drive types: HDD & SSD
Supported storage drive interfaces: M.2
Number of HDDs supported: 4
Number of storage drives supported: 6
RAID support: Yes
RAID levels: 0, 1, 10

Graphics

Parallel processing technology support: Not supported

Internal I/O

USB 2.0 connectors: 4
USB 3.2 Gen 1 (3.1 Gen 1) connectors: 2
USB 3.2 Gen 2 (3.1 Gen 2) connectors: 1
Number of SATA III connectors: 4
Total number of SATA connectors: 4
Front panel audio connector: Yes
Front panel connector: Yes
ATX Power connector (24-pin): Yes
CPU fan connector: Yes
Number of CPU fan connectors: 2
Number of water pump connectors: 1
RGB LED pin header: Yes
Number of RGB LED pin headers: 3

Rear panel I/O ports

USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity: 4
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity: 3
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity: 2
Ethernet LAN (RJ-45) ports: 1
HDMI ports quantity: 1
HDMI version: 2.1

Network

Ethernet LAN: Yes
Ethernet interface type: 5 Gigabit Ethernet
Wi-Fi: Yes
Top Wi-Fi standard: Wi-Fi 7 (802.11be)
Wi-Fi standards: 802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax), Wi-Fi 6E (802.11ax), Wi-Fi 7 (802.11be)
Bluetooth: Yes
Bluetooth version: 5.4

Features

Motherboard chipset: AMD B850
Audio chip: Realtek ALC897
Audio output channels: 7.1 channels
Product colour: Black
Component for: PC
Motherboard form factor: micro ATX
Motherboard chipset family: AMD
Windows operating systems supported: Windows 11 x64

Expansion slots

PCI Express x4 slots: 1
PCI Express x16 slots: 1
PCI Express x16 (Gen 3.x) slots: 1
PCI Express x16 (Gen 4.x) slots: 1
PCI Express x16 (Gen 5.x) slots: 1
Number of M.2 (M) slots: 2
1st M.2 largest key size: 2280
1st M.2 highest PCI Express generation: 5.0
2nd M.2 largest key size: 2280
2nd M.2 highest PCI Express generation: 4.0

BIOS

BIOS type: UEFI AMI
BIOS memory size: 256 Mbit
ACPI version: 6.5
System Management BIOS (SMBIOS) version: 3.7

Weight & dimensions

Width: 243.8 mm
Depth: 243.8 mm

Technical details

Legal guarantee: 3 year(s)

Check the manufacturer's page before buying.

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Compatible processors

AM5 socket

AMD Ryzen 7 9800X3D8 cores · 16 threads
AMD Ryzen 5 76006 cores · 12 threads
AMD Ryzen 7 7800X3D8 cores · 16 threads
AMD Ryzen 5 9600X6 cores · 12 threads
AMD Ryzen 5 7500F6 cores · 12 threads
AMD Ryzen 5 8600G6 cores · 12 threads
AMD Ryzen 9 9950X16 cores · 32 threads
AMD Ryzen 7 77008 cores · 16 threads

Compatible memory

DDR5

Kingston FURY Beast 32GB (2x16) DDR5-6000 CL3632 GB (2x16) · DDR5
ADATA XPG Lancer RGB 32GB (2x16) DDR5-6000 CL3032 GB (2x16) · DDR5
Klevv Urbane V RGB32 GB (2x16) · DDR5
Klevv 32GB (2X16GB) 6000MHz CL28 DDR5 GAMING RAM MODULE 28-36-36-76 1.4V CRAS V RGB WHITE KIT32 GB (2x16) · DDR5
Klevv Bolt V32 GB (2x16) · DDR5
Klevv Fit V16 GB (1x16) · DDR5
Kingston 16GB 5600MT/s DDR5 CL40 DIMM FURY Beast White XMP16 GB (1x16) · DDR5
VeloxStor 7011-DDR, 16 GB, DDR5, 4800 MT/s, 288-pin UDIMM16 GB (1x16) · DDR5

About this product

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. 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.

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.

Datasheet (PDF)

PRO B850M-A WIFI vs similar motherboards

	MSI PRO B850M-A WIFI	MSI AM5 PRO B850M-A WIFI PZ M-ATX	MSI B850M GAMING PLUS WIFI	MSI B850M GAMING PLUS WIFI6E
Chipset	B850	B850	B850	B850
Form factor	mATX	mATX	mATX	mATX
Memory slots	4	4	4	4
Max memory	256 GB	256 GB	256 GB	256 GB
Socket	AM5	AM5	AM5	AM5
Memory type	DDR5	DDR5	DDR5	DDR5
Released	2025	2025	2025	2025