Elpida DDR3 SO-DIMM 2GB Memory Ram PC3-10600S-9-10-F1 at Amazon.com
8GB PC3-10600S DDR3 1333MHz 2Rx8 204pin 1.35V 1.5V CL9 RAM Notebook RAM Memory for Early/Late 2011 13/15/17 inch MacBook Pro, Mid 2010 and Mid/Late 2011 21.5/27 inch iMac, Mid 2011 Mac Mini at Amazon.com