MSI Z170A TOMAHAWK AC

Board code MS-7970 Motherboard, from 2016 2 hardware reports

SSD slots

Coming next

Checked from separate sources

Only 2 machines reported so far, so this answer rests on few examples. Check the label or open the panel before you buy.

Upgradable

Yes. 4 slots, up to 16 GB seen working.

It takes DDR4-2133 full-size sticks (DIMM).

Slots: 4 DIMM slots
Type: DDR4-2133 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: 2 of 2 reports show this layout

See 4 GB DDR4-2133 DIMM on AmazonOpens an Amazon search for this exact spec.

Worked out from 2 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 Z170A TOMAHAWK AC?

Yes. 4 slots, up to 16 GB seen working. It takes DDR4-2133 full-size sticks (DIMM).

What type of RAM does the MSI Z170A TOMAHAWK AC use?

DDR4-2133 full-size sticks (DIMM, 288-pin).

How much RAM can the MSI Z170A TOMAHAWK AC 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 Z170A TOMAHAWK AC or MS-7970.