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MSI MAG B850M MORTAR WIFI AM5 AMD B850 Micro ATX Motherboard

OPEN BOX

The Open Box Product Disclaimer applies to this product. Please note that this product is non-returnable and non-refundable.

Specs

Learn more about the MSI MAG B850M MORTAR WIFI

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
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

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	October 09, 2025