8GB Stick for IBM Lenovo ThinkPad T Series T420 T420i T420s T520 T520i. SO-DIMM DDR3 Non-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com
Lenovo ThinkPad X270 Ultrabook Full HD DEMOWARE NEU OVP, 499,90 €
How to upgrade RAM - Lenovo ThinkPad E580 - YouTube