MSI MAG B550M MORTAR

Board code MS-7C94 Motherboard, from 2020 36 hardware reports

Memory

Up to 64 GB

4 full-size slots

SSD

1+ M.2

At least 1 M.2 SSD slot

SSD length

Coming next

Checked from separate sources

Upgradable

Yes. 4 slots, up to 64 GB seen working.

It takes DDR4-3600 full-size sticks (DIMM).

Slots: 4 DIMM slots
Type: DDR4-3600 288-pin DIMM
Most seen working: 64 GB in two or more machines; one machine runs 128 GB
Firmware says: 128 GB maximum (often wrong, so we show what machines run)
SSD slots: At least 1 M.2 SSD slot listed by the firmware
How sure: 36 of 36 reports show this layout

See 16 GB DDR4-3600 DIMM on AmazonOpens an Amazon search for this exact spec.

Worked out from 36 hardware reports of this motherboard. Sources and method. Updated 9 Nov 2026.

4 full-size slots

Illustration

Questions

Can I upgrade the RAM in the MSI MAG B550M MORTAR?

Yes. 4 slots, up to 64 GB seen working. It takes DDR4-3600 full-size sticks (DIMM).

What type of RAM does the MSI MAG B550M MORTAR use?

DDR4-3600 full-size sticks (DIMM, 288-pin).

How much RAM can the MSI MAG B550M MORTAR take?

Machines in the reports run up to 64 GB, and one runs 128 GB. The firmware reports a maximum of 128 GB, a figure that is often wrong.

Does the MSI MAG B550M MORTAR have an M.2 SSD slot?

Yes. The firmware lists at least 1 M.2 SSD slot, in 36 reports. Some firmware leaves a slot out, so there may be more.

Is this my motherboard?

The model name is printed on the board, usually between the memory slots or near the CPU socket. In Windows, open System Information and look at "BaseBoard Product"; it should read MAG B550M MORTAR or MS-7C94.