MSI PRO B660M-B DDR4
Only 2 machines reported so far, so this answer rests on few examples. Check the label or open the panel before you buy.
It depends on the configuration.
The reports show more than one memory layout for this motherboard. Check the label or the system information before you buy.
- Slots
- 2 DIMM slots
- Type
- DDR4-2800 288-pin DIMM
- Most seen working
- 16 GB in two or more machines
- Firmware says
- 64 GB maximum (often wrong, so we show what machines run)
- How sure
- 1 of 2 reports show this layout
Worked out from 2 hardware reports of this motherboard. Sources and method. Updated 9 Nov 2026.
Questions
Can I upgrade the RAM in the MSI PRO B660M-B DDR4?
It depends on the configuration: the reports show more than one memory layout for this motherboard.
What type of RAM does the MSI PRO B660M-B DDR4 use?
DDR4-2800 full-size sticks (DIMM, 288-pin).
How much RAM can the MSI PRO B660M-B DDR4 take?
Machines in the reports run up to 16 GB. The firmware reports a maximum of 64 GB, a figure that is often wrong.
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 PRO B660M-B DDR4 or MS-7D45.