Acer Aspire M3420
Desktop, from 2012 6 hardware reports
Memory

Up to 12 GB
4 full-size slots
Drives and power
Coming next
Checked from separate sources
Upgradable
Yes. 4 slots, up to 12 GB seen working.
It takes DDR3-1333 full-size sticks (DIMM).
- Slots
- 4 DIMM slots
- Type
- DDR3-1333 240-pin DIMM
- Most seen working
- 12 GB in two or more machines
- Firmware says
- 22 GB maximum (often wrong, so we show what machines run)
- How sure
- 6 of 6 reports show this layout
See 8 GB DDR3-1333 DIMM on AmazonOpens an Amazon search for this exact spec.
Worked out from 6 hardware reports of this desktop. Sources and method. Updated 9 Nov 2026.

4 full-size slots
Illustration Questions
Can I upgrade the RAM in the Acer Aspire M3420?
Yes. 4 slots, up to 12 GB seen working. It takes DDR3-1333 full-size sticks (DIMM).
What type of RAM does the Acer Aspire M3420 use?
DDR3-1333 full-size sticks (DIMM, 240-pin).
How much RAM can the Acer Aspire M3420 take?
Machines in the reports run up to 12 GB. The firmware reports a maximum of 22 GB, a figure that is often wrong.
Is this my desktop?
Check the model name on the front or the label of the case. It should read Aspire M3420.