Lenovo IdeaPad S145-15AST

Type 81N3 Laptop, from 2019 54 hardware reports
Memory
Up to 8 GB
1 laptop-size slot
SSD
1+ M.2
At least 1 M.2 SSD slot
SSD length and charger
Coming next
Checked from separate sources
Upgradable

Yes. One slot, up to 8 GB seen working.

It takes DDR4-2133 laptop-size sticks (SO-DIMM).

Slots
1 SO-DIMM slot
Type
DDR4-2133 260-pin SO-DIMM
Most seen working
8 GB in two or more machines
Firmware says
8 GB maximum
SSD slots
At least 1 M.2 SSD slot listed by the firmware
How sure
54 of 54 reports show this layout
See 8 GB DDR4-2133 SO-DIMM on AmazonOpens an Amazon search for this exact spec.

Worked out from 54 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 IdeaPad S145-15AST?

Yes. One slot, up to 8 GB seen working. It takes DDR4-2133 laptop-size sticks (SO-DIMM).

What type of RAM does the Lenovo IdeaPad S145-15AST use?

DDR4-2133 laptop-size sticks (SO-DIMM, 260-pin).

How much RAM can the Lenovo IdeaPad S145-15AST take?

Machines in the reports run up to 8 GB. That matches the 8 GB maximum the firmware reports.

Does the Lenovo IdeaPad S145-15AST have an M.2 SSD slot?

Yes. The firmware lists at least 1 M.2 SSD slot, in 54 reports. Some firmware leaves a slot out, so there may be more.

Is this my laptop?

Check the label on the bottom. It should say IdeaPad S145-15AST, and the type code starts with 81N3.

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