MSI MAG B550M Mortar Max WiFi mATX AM4 Motherboard

Chipset

AMD B550 Chipset

Memory

4x DDR4 memory slots, support up to 128GB

Supports DDR4 1866/ 2133/ 2400/ 2667/ 2800/ 2933/ 3000/ 3066/ 3200 MHz by JEDEC

Supports DDR4 2667/ 2800/ 2933/ 3000/ 3066/ 3200/ 3466/ 3600/ 3733/ 3866/ 4000/ 4133/ 4266/ 4400+ MHz by A-XMP OC MODE

1DPC 1R max speed 4400 MHZ

1DPC 2R max speed 3733 MHZ

2DPC 1R max speed 3866 MHZ

2DPC 2R max speed 3466 MHZ

Dual channel memory architecture

Supports non-ECC UDIMM memory

Supports ECC UDIMM memory (non-ECC mode)

Supports un-buffered memory

* Please refer www.msi.com for more information on compatible memory.

* See supported memory

Expansion slot

1x PCIe 3.0/ 4.0 x16 slot (PCI_E1)

1x PCIe 3.0 x16 slot (PCI_E4), supports x4 mode

2x PCIe 3.0 x1 slots

* The supported specification depends on installed processor.

* PCI_E4 will be unavailable when an M.2 SSD is installed in the M2_2 slot.

Multi-GPU

Supports 2-Way AMD CrossFire™ Technology

Onboard graphics

1x HDMI™ 2.1 port, supports a maximum resolution of 4096x2160 @60Hz

Support HDCP 1.4 & 2.3

1x DisplayPort, supports a maximum resolution of 4096x2160 @60Hz

Maximum shared memory of 16 GB

* Available for the processor with integrated graphics.

* Graphics specifications may vary depending on the CPU installed.

Storage

AMD B550 Chipset

6x SATA 6Gb/s ports

2x M.2 slots (Key M)

M2_1 slot (from AMD processor)

Supports PCIe 4.0/ 3.0 x4

Supports SATA 6Gb/s

Supports 2242/ 2260/ 2280 storage devices

M2_2 slot (from AMD B550 chipset)

Supports PCIe 3.0x4

Supports 2242/ 2260/ 2280 storage devices

* The supported specification depends on installed processor.

RAID

AMD B550 Chipset

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

AMD B550 Chipset

3x USB 3.2 Gen 1 5Gbps ports (1 Type-C internal connector, and 2 ports are available through the internal USB 3.2 Gen 1 5Gbps connector)

6x USB 2.0 ports (2 Type-A ports on the back panel, 4 ports through the internal USB 2.0 connectors)

AMD Processor

2x USB 3.2 Gen 2 10Gbps ports (1 Type-C port and 1 Type-A port on the back panel)

2x USB 3.2 Gen 1 5Gbps Type-A ports on the back panel

Audio

Realtek® ALC1220P Codec

7.1-Channel High Definition Audio

Supports S/PDIF output

LAN

1x Realtek® RTL8125B 2.5Gbps LAN controller

Wireless LAN & Bluetooth®

AMD® Wi-Fi 6E

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

Supports MU-MIMO TX/RX

Supports 20MHz, 40MHz, 80MHz bandwidth in 2.4GHz/ 5GHz or 6GHz bands

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

Supports Bluetooth® 5.2

* Wi-Fi 6E 6GHz may depend on every country’s regulations and will be ready in Windows 10 version 21H1 and Windows 11

* Bluetooth 5.2 will be ready in Windows 10 version 21H1 and Windows 11.

Internal connectors

1x 24-pin ATX main power connector

1x 8-pin ATX 12V power connector

6x SATA 6Gb/s connectors

2x M.2 slots (M-Key)

1x USB 3.2 Gen 1 5Gbps Type-C port

1x USB 3.2 Gen 1 5Gbps connector (supports additional 2 USB 3.2 Gen 1 5Gbps ports)

2x USB 2.0 connectors (supports additional 4 USB 2.0 ports)

1x 4-pin CPU fan connector

1x 4-pin water-pump fan connector

3x 4-pin system fan connectors

1x Front panel audio connector

2x System panel connectors

1x Chassis Intrusion connector

1x 4-pin RGB LED connector

2x 3-pin RAINBOW LED connectors

1xTPM module connector

1x Clear CMOS jumper

Back panel ports

DisplayPort 1.4

PS/2 Combo Port

2.5G LAN Port

USB 3.2 Gen 2 10Gbps Type-A

Wi-Fi / Bluetooth Antenna

HD Audio Connectors

HDMI™ 2.1 Port

Flash BIOS Button

USB 2.0 Port

USB 3.2 Gen 1 5Gbps Type-A

USB 3.2 Gen 2 10Gbps Type-C

Optical S/PDIF OUT

Dimensions

Micro-ATX Form Factor

9.6 in. x 9.6 in. (24.4 cm x 24.4 cm)

Mounting

8 mounting holes

Operating system

Support for Windows® 11 64-bit, Windows® 10 64-bit

Box content

MAG B550M MORTAR MAX WIFI Motherboard

2 x SATA Cables

Wi-Fi Antenna

MSI Case Badge

Driver DVD

MAG Stickers

Quick Installation Guide

Product Registration Card