8GB 2 x 4GB DDR3 Memory for Lenovo ThinkPad X201 X220 X220i Tablet PC3-10600 1333MHz 204 pin SODIMM Laptop Notebook RAM (PARTS-QUICK BRAND) 8GB PC3-10600S DDR3 1333MHz 204 pin SODIMM for Lenovo ThinkPad X201 X220 X220i Tablet Capacity: 8GB 2 x 4GB Kit Speed: PC3-10600 DDR3 1333MHz Form Factor: 204 pin SODIMM Halogen Free; ROHS Warranty: Lifetime