Lenovo ThinkPad X220 429035U
Laptop, from 2011 2 hardware reports
Memory
Up to 16 GB
2 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. 2 slots, up to 16 GB seen working.
It takes DDR3-1333 laptop-size sticks (SO-DIMM).
- Slots
- 2 SO-DIMM slots
- Type
- DDR3-1333 204-pin SO-DIMM
- Most seen working
- 16 GB in two or more machines
- Firmware says
- 16 GB maximum
- How sure
- 2 of 2 reports show this layout
See 8 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.
2 laptop-size slots
Illustration Questions
Can I upgrade the RAM in the Lenovo ThinkPad X220 429035U?
Yes. 2 slots, up to 16 GB seen working. It takes DDR3-1333 laptop-size sticks (SO-DIMM).
What type of RAM does the Lenovo ThinkPad X220 429035U use?
DDR3-1333 laptop-size sticks (SO-DIMM, 204-pin).
How much RAM can the Lenovo ThinkPad X220 429035U take?
Machines in the reports run up to 16 GB. That matches the 16 GB maximum the firmware reports.
Is this my laptop?
Check the model name on the label underneath. It should read ThinkPad X220 429035U.