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MSI MAG B850M MORTAR WIFI AM5 AMD B850 Micro ATX Motherboard

Item #: 9SIVT66M4H8951
Mfr. Part #: MAG B850M MORTAR WIFI
UNSPSC: 43201513

(14)(3) Write a Review

AMD B850
Ryzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
Support DDR5 8200 - 5600 (OC) MT/s / 5600 - 4800 (JEDEC) MT/s

Overview

Specs

Reviews (14)

MAG B850M MORTAR WIFI is designed for gamers with a stable, durable and DIY friendly foundation for their PC builds. Coming up with true Wi-Fi 7 solution, 5G LAN, USB 20Gbps, PCIe 5.0 solutions, Supplemental PCIe Power, and exclusive EZ DIY features, it's ready for the battlefield of AMD Ryzen 9000 series processors.

Model
Brand	MSI
Model	MAG B850M MORTAR WIFI

Supported CPU
CPU Socket Type	AM5
CPU Type	Ryzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series

Chipsets
Chipset	AMD B850

Memory
Number of Memory Slots	4x288pin (DDR5)
Memory Standard	Support DDR5 8200 - 5600 (OC) MT/s / 5600 - 4800 (JEDEC) MT/s
Maximum Memory Supported	256GB
Channel Supported	Dual Channel
Memory Performance Profile	AMD EXPO
ECC Supported	Non-ECC
Buffer Supported	Un-buffered
Memory Feature	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

Expansion Slots
PCI Express 5.0 x16	PCI_E1 Gen PCIe 5.0 supports up to x16 (From CPU) 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 processors)
PCI Express 4.0 x16	PCI_E2 Gen PCIe 4.0 supports up to x4 (From Chipset)

Storage Devices
Serial ATA (SATA)	4 x SATA 6Gb/s
M.2	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 5.0 x4 (For Ryzen 9000/ 7000 Series processors) - Supports up to PCIe 4.0 x4 (For Ryzen 8700/ 8600/ 8400 Series processors) - Supports up to PCIe 4.0 x2 (For Ryzen 8500/ 8300 Series processors) M2_3 slot - Supports up to PCIe 4.0 x2
SATA RAID	Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices Supports RAID 0, RAID 1 and RAID 5 for M.2 NVMe storage devices *RAID 5 configuration is only supported by Ryzen 9000 series processors.

Onboard Audio
Audio Chipset	Realtek ALC4080
Audio Channels	7.1 Channels

Onboard LAN
Max LAN Speed	5Gbps
Wireless LAN	Wi-Fi 802.11 be
Bluetooth	Bluetooth 5.4

Rear Panel Ports
Back I/O Ports	1 x Clear CMOS Button 1 x 5G LAN 3 x USB 10Gbps Type-A 4 x USB 5Gbps Type-A 2 x Audio Connectors 1 x Flash BIOS Button 1 x HDMI 1 x USB 10Gbps Type-C 1 x USB 20Gbps Type-C 2 x Wi-Fi / Bluetooth 1 x Optical S/PDIF Out

Internal I/O Connectors
Onboard USB	4 x USB 2.0 ports 2 x USB 5Gbps Type A ports 1 x USB 10Gbps Type C ports
Other Connectors	1 x CPU Fan 1 x Combo Fan (Pump_Sys Fan) 4 x System Fan 1 x EZ Conn-header (JAF_1) 2 x Front Panel (JFP) 1 x Chassis Intrusion (JCI) 1 x Front Audio (JAUD) 1 x Tuning Controller connector(JDASH) 3 x Addressable V2 RGB LED connector (JARGB_V2) 1 x RGB LED connector(JRGB) 1 x TPM pin header(Support TPM 2.0)

Physical Spec
Form Factor	Micro ATX
Dimensions (W x L)	9.6" x 9.6"
Power Pin	1 x Power Connector(ATX_PWR) 2 x Power Connector(CPU_PWR) 1 x Power Connector(PCIE_PWR 8pin)

Software Feature
Windows 11	Support for Windows 11 64-bit

Additional Information
First Listed on Newegg	August 13, 2026

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Return for replacement within: 60 days
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Item#: 9SIVT66M4H8951

Best Sellers

Meet Your Seller

MSI MAG B850M MORTAR WIFI AM5 AMD B850 Micro ATX Motherboard

Learn more about the MSI MAG B850M MORTAR WIFI

Customer Reviews of the MSI MAG B850M MORTAR WIFI

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info