* The supported specification depends on installed processor.
SATA RAID
0/1/10
Onboard Video
Onboard Video Chipset
Supported only by CPU with integrated graphic: 1 x HDMI port, supports a maximum resolution of 4096x2160 @24Hz 1 x DisplayPort, supports a maximum resolution of 4096x2160 @60Hz Maximum shared memory of 2048MB
* Available for the processor with integrated graphics.
Onboard Audio
Audio Chipset
Realtek ALC1200
Audio Channels
7.1-Channel High Definition Audio Supports S/PDIF output
Onboard LAN
LAN Chipset
Realtek RTL8125B
Max LAN Speed
2.5Gbps
Rear Panel Ports
Back I/O Ports
1 x DisplayPort / 1 x HDMI / 1 x LAN (RJ45) / 1 x Optical S/PDIF Out / 1 x PS/2 Keyboard/Mouse Combo / 1 x USB 3.2 Gen 2 Type-A / 1 x USB 3.2 Gen 2 Type-C / 2 x USB 2.0/1.1 / 2 x USB 3.2 Gen 1 Type-A / 5 x Audio Jacks
Internal I/O Connectors
Onboard USB
1 x USB 3.2 Gen 1 5Gbps Type-C port 1 x USB 3.2 Gen 1 5Gbps connector (supports additional 2 USB 3.2 Gen 1 5Gbps ports) 2 x USB 2.0 connectors (supports additional 4 USB 2.0 ports)
Other Connectors
1 x 4-pin CPU fan connector 1 x 4-pin water-pump fan connector 3 x 4-pin system fan connectors 1 x Front panel audio connector 2 x System panel connectors 1 x Chassis Intrusion connector 1 x 4-pin RGB LED connector 2 x 3-pin RAINBOW LED connectors 1 x TPM module connector 1 x Clear CMOS jumper
Physical Spec
Form Factor
Micro ATX
LED Lighting
RGB
Dimensions (W x L)
9.6" x 9.6"
Power Pin
1 x 24-pin ATX main power connector 1 x 8-pin ATX 12V power connector
Features
Features
Support for 3rd Gen AMD Ryzen Processors and future AMD Ryzen processors with BIOS update
Supports DDR4 Memory, up to 4400+(OC) MHz
Lightning Fast Game experience: PCIe 4.0, Lightning Gen 4 x4 M.2 with M.2 Shield Frozr, AMD Turbo USB 3.2 Gen 2
Premium Thermal Solution: Extended Heatsink Design with additional choke thermal pad rated for 7W/mk and PCB with 2oz thickened copper are built for high performance system and non-stop gaming experience
Enhanced Power Design: 8+2+1 Duet Rail Power System, Digital PWM, Core Boost, DDR4 Boost
2.5G LAN with LAN Manager: Upgraded network solution for professional and multimedia use. Delivers a secure, stable and fast network connection
Pre-installed I/O Shielding: Better EMI protection and more convenience for installation
Audio Boost: Reward your ears with studio grade sound quality for the most immersive gaming experience
Multi-GPU: With Steel Armor PCI-E slots. Supports 2-Way AMD Crossfire
Additional Information
First Listed on Newegg
August 13, 2026
Customer Reviews of the MSI MAG B550M MORTAR
There are no reviews yet.
Do you own this product?
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.