OWC 4GB PC12800 DDR3L 1600MHz SO-DIMM Memory Compatible with 2011-2015 iMac, 2011-12 Mac Mini, and 2011-2012 MacBook Pro (Non-Retina Display) Models (OWC1600DDR3S4GB) at Amazon.com
Samsung original 4GB, 204-pin SODIMM, DDR3 PC3L-12800, ram memory module for laptop ( M471B5173QH0-YK0 ) at Amazon.com
Ram memory 4GB (1 x 4GB) DDR3 PC3-12800,1600MHz, 204 PIN SODIMM for laptops at Amazon.com
Motoeagle 4GB 2RX8 PC3-10600S Memory,4GB DDR3 1333Mhz SO-DIMM RAM 204-pin for Laptop Notebook at Amazon.com