16GB (4 X 4GB) DDR3 1333MHz PC3-10600 240-pin Memory RAM DIMM by NEMIX RAM at Amazon.com
Crucial RAM 4GB DDR3 1333 MHz CL9 Memory for Mac CT4G3S1339M at Amazon.com
Kingston Technology 8GB (1x8 GB) 1333MHz DDR3 PC3 10600 204-Pin SODIMM Memory for Select Lenovo Notebooks KTL-TP3B/8G at Amazon.com
Kingston Technology 4GB 1333MHz DDR3 Single Rank SODIMM for HP/Compaq Laptop KTH-X3BS/4G at Amazon.com
Amazon.com: Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3 1333MHz PC3-10600 CL9 for Mac Book Pro (Early/Late 2011 13/15/17 inch), iMac(Mid 2010, Mid/Late 2011 21.5/27 inch), Mac Mini(Mid 2011) MAC RAM Upgrade :