Lenovo ThinkPad W540
Type 20BG Laptop, from 2014 17 hardware reports
Memory
Up to 32 GB
4 laptop-size slots
SSD and charger
Coming next
Checked from separate sources
Upgradable
Yes. 4 slots, up to 32 GB seen working.
It takes DDR3-1600 laptop-size sticks (SO-DIMM).
- Slots
- 4 SO-DIMM slots
- Type
- DDR3-1600 204-pin SO-DIMM
- Most seen working
- 32 GB in two or more machines
- Firmware says
- 32 GB maximum
- How sure
- 17 of 17 reports show this layout
See 8 GB DDR3-1600 SO-DIMM on AmazonOpens an Amazon search for this exact spec.
Worked out from 17 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.
4 laptop-size slots
Illustration Questions
Can I upgrade the RAM in the Lenovo ThinkPad W540?
Yes. 4 slots, up to 32 GB seen working. It takes DDR3-1600 laptop-size sticks (SO-DIMM).
What type of RAM does the Lenovo ThinkPad W540 use?
DDR3-1600 laptop-size sticks (SO-DIMM, 204-pin).
How much RAM can the Lenovo ThinkPad W540 take?
Machines in the reports run up to 32 GB. That matches the 32 GB maximum the firmware reports.
Is this my laptop?
Check the label on the bottom. It should say ThinkPad W540, and the type code starts with 20BG. Other type codes share this name: 20BH.