Lenovo IdeaPad S540-14IML

Type 81NF Laptop, from 2019 5 hardware reports
Memory
Up to 12 GB
2 laptop-size slots
SSD and charger
Coming next
Checked from separate sources
Upgradable

Yes. 2 slots, up to 12 GB seen working.

It takes DDR4-2666 laptop-size sticks (SO-DIMM).

Slots
2 SO-DIMM slots
Type
DDR4-2666 260-pin SO-DIMM
Most seen working
12 GB in two or more machines; one machine runs 20 GB
Firmware says
32 GB maximum (often wrong, so we show what machines run)
How sure
5 of 5 reports show this layout
See 4 GB DDR4-2666 SO-DIMM on AmazonOpens an Amazon search for this exact spec.

Worked out from 5 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.

2 laptop-size slots
Illustration

Questions

Can I upgrade the RAM in the Lenovo IdeaPad S540-14IML?

Yes. 2 slots, up to 12 GB seen working. It takes DDR4-2666 laptop-size sticks (SO-DIMM).

What type of RAM does the Lenovo IdeaPad S540-14IML use?

DDR4-2666 laptop-size sticks (SO-DIMM, 260-pin).

How much RAM can the Lenovo IdeaPad S540-14IML take?

Machines in the reports run up to 12 GB, and one runs 20 GB. The firmware reports a maximum of 32 GB, a figure that is often wrong.

Is this my laptop?

Check the label on the bottom. It should say IdeaPad S540-14IML, and the type code starts with 81NF.

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