Lenovo ThinkPad W550s
Type 20E2 Laptop, from 2015 6 hardware reports
Memory
Up to 16 GB
2 laptop-size slots
SSD and charger
Coming next
Checked from separate sources
Upgradable
Yes. 2 slots, up to 16 GB seen working.
It takes DDR3-1600 laptop-size sticks (SO-DIMM).
- Slots
- 2 SO-DIMM slots
- Type
- DDR3-1600 204-pin SO-DIMM
- Most seen working
- 16 GB in two or more machines; one machine runs 32 GB
- Firmware says
- 16 GB maximum
- How sure
- 6 of 6 reports show this layout
See 8 GB DDR3-1600 SO-DIMM on AmazonOpens an Amazon search for this exact spec.
Worked out from 6 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 ThinkPad W550s?
Yes. 2 slots, up to 16 GB seen working. It takes DDR3-1600 laptop-size sticks (SO-DIMM).
What type of RAM does the Lenovo ThinkPad W550s use?
DDR3-1600 laptop-size sticks (SO-DIMM, 204-pin).
How much RAM can the Lenovo ThinkPad W550s take?
Machines in the reports run up to 16 GB, and one runs 32 GB. That matches the 16 GB maximum the firmware reports.
Is this my laptop?
Check the label on the bottom. It should say ThinkPad W550s, and the type code starts with 20E2.