Lenovo ThinkPad W520 42844DG
Laptop, from 2013 2 hardware reports
Memory

Up to 24 GB
4 laptop-size slots
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. 4 slots, up to 24 GB seen working.
It takes DDR3-1333 laptop-size sticks (SO-DIMM).
- Slots
- 4 SO-DIMM slots
- Type
- DDR3-1333 204-pin SO-DIMM
- Most seen working
- 24 GB; one machine runs 24 GB
- Firmware says
- 32 GB maximum
- How sure
- 2 of 2 reports show this layout
See 4 GB DDR3-1333 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.

4 laptop-size slots
Illustration Questions
Can I upgrade the RAM in the Lenovo ThinkPad W520 42844DG?
Yes. 4 slots, up to 24 GB seen working. It takes DDR3-1333 laptop-size sticks (SO-DIMM).
What type of RAM does the Lenovo ThinkPad W520 42844DG use?
DDR3-1333 laptop-size sticks (SO-DIMM, 204-pin).
Is this my laptop?
Check the model name on the label underneath. It should read ThinkPad W520 42844DG.