4GB RAM Memory Upgrade for Lenovo ThinkPad T400 (DDR3-1333MHz 204-pin SODIMM) at Amazon.com
parts-quick 16GB Memory for Lenovo ThinkPad P53 Compatible RAM Upgrade DDR4 2666MHz SoDIMM at Amazon.com
2GB Memory RAM Upgrade for the Lenovo Thinkpad R61 Series, T60 Series, T61 Series, X60 Series and X61 Series Laptops (DDR2-667, PC2-5300, SODIMM) at Amazon.com
A-Tech 8GB RAM for Lenovo IDEAPAD S145-15AST (1 x 8GB) DDR4 2400MHz SODIMM PC4-19200 260-Pin Non-ECC Unbuffered Laptop Notebook Memory Upgrade Module at Amazon.com
CMS 128GB (4X32GB) DDR4 21300 2666MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® ThinkPad P52, ThinkPad P53, ThinkPad P72, ThinkPad P73 - D106 at Amazon.com
A-Tech 16GB RAM Kit for Lenovo ThinkBook 15p IMH (2 x 8GB) DDR4 2933 MHz PC4-23400 Non-ECC Unbuffered SODIMM 260-Pin Laptop Notebook PC Memory Upgrade at Amazon.com