MSI MEG Z790 ACE

Board code MS-7D86 Motherboard, from 2023 3 hardware reports

Memory

Up to 128 GB

4 full-size slots

SSD slots

Coming next

Checked from separate sources

Upgradable

Yes. 4 slots, up to 128 GB seen working.

It takes DDR5-4000 full-size sticks (DIMM).

Slots: 4 DIMM slots
Type: DDR5-4000 288-pin DIMM
Most seen working: 128 GB; one machine runs 128 GB
Firmware says: 128 GB maximum
How sure: 3 of 3 reports show this layout

See 32 GB DDR5-4000 DIMM on AmazonOpens an Amazon search for this exact spec.

Worked out from 3 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 MEG Z790 ACE?

Yes. 4 slots, up to 128 GB seen working. It takes DDR5-4000 full-size sticks (DIMM).

What type of RAM does the MSI MEG Z790 ACE use?

DDR5-4000 full-size sticks (DIMM, 288-pin).

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 MEG Z790 ACE or MS-7D86.