Lenovo IdeaPad S340-15IIL

Type 81WL Laptop, from 2020 3 hardware reports
Memory
Up to 8 GB
1 laptop-size slot + soldered
SSD and charger
Coming next
Checked from separate sources
Partly soldered

Yes, you can add one stick. Up to 8 GB seen working.

4 GB is soldered to the board and one slot is free for a DDR4-2666 laptop-size stick.

Free slots
1 SO-DIMM slot
Type
DDR4-2666 260-pin SO-DIMM
Soldered
4 GB
Most seen working
8 GB in two or more machines
Firmware says
32 GB maximum (often wrong, so we show what machines run)
How sure
2 of 3 reports show this layout
See 4 GB DDR4-2666 SO-DIMM on AmazonOpens an Amazon search for this exact spec.

Worked out from 3 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.

1 laptop-size slot plus soldered memory
Illustration

Questions

Can I upgrade the RAM in the Lenovo IdeaPad S340-15IIL?

Yes, you can add one stick. Up to 8 GB seen working. 4 GB is soldered to the board and one slot is free for a DDR4-2666 laptop-size stick.

What type of RAM does the Lenovo IdeaPad S340-15IIL use?

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

How much RAM can the Lenovo IdeaPad S340-15IIL take?

Machines in the reports run up to 8 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 S340-15IIL, and the type code starts with 81WL. Other type codes share this name: 81VW.

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