IBM ThinkPad T43 2668BU7
Laptop, from 2006 2 hardware reports
Memory

Up to 2 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 2 GB seen working.
It takes DDR laptop-size sticks (SO-DIMM).
- Slots
- 2 SO-DIMM slots
- Type
- DDR SO-DIMM
- Most seen working
- 2 GB; one machine runs 2 GB
- Firmware says
- 1 GB maximum
- How sure
- 2 of 2 reports show this layout
See 8 GB DDR 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 IBM ThinkPad T43 2668BU7?
Yes. 2 slots, up to 2 GB seen working. It takes DDR laptop-size sticks (SO-DIMM).
What type of RAM does the IBM ThinkPad T43 2668BU7 use?
DDR laptop-size sticks (SO-DIMM).
Is this my laptop?
Check the model name on the label underneath. It should read ThinkPad T43 2668BU7.