Lenovo ThinkBook 14s-IML

Type 20RS Laptop, from 2020 2 hardware reports
Memory
Up to 16 GB
1 laptop-size slot
SSD and charger
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. One slot, up to 16 GB seen working.

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

Slots
1 SO-DIMM slot
Type
DDR4-2666 260-pin SO-DIMM
Most seen working
16 GB in two or more machines
Firmware says
16 GB maximum
How sure
2 of 2 reports show this layout
See 16 GB DDR4-2666 SO-DIMM on AmazonOpens an Amazon search for this exact spec.

Worked out from 2 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.

1 laptop-size slot
Illustration

Questions

Can I upgrade the RAM in the Lenovo ThinkBook 14s-IML?

Yes. One slot, up to 16 GB seen working. It takes DDR4-2666 laptop-size sticks (SO-DIMM).

What type of RAM does the Lenovo ThinkBook 14s-IML use?

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

How much RAM can the Lenovo ThinkBook 14s-IML take?

Machines in the reports run up to 16 GB. That matches the 16 GB maximum the firmware reports.

Is this my laptop?

Check the label on the bottom. It should say ThinkBook 14s-IML, and the type code starts with 20RS.

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