Samsung 4GB DDR3 PC3-12800 1600MHz 204-Pin SODIMM Laptop Memory Module RAM. Model M471B5273DH0-CK0 at Amazon.com
4GB PC3-12800 1600MHZ DDR3 240PIN DIMM ECC DR X8 VLP REG CL11 at Amazon.com
HP RAM Memory 1 x 4GB DDR3L SDRAM 4 DDR3 1600 DDR3L SDRAM H6Y75AA#ABA at Amazon.com
DDR3 Desktop RAM, 4GB 1333Mhz High Frequency DDR3 240PIN PC3-10600 Computer Memory RAM 1.5V for Intel/ AMD at Amazon.com
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com
Kingston 4GB 1333MHz DDR3 DIMM Memory For Select Dell Desktops at Amazon.com
DUOMEIQI Pc3-10600 ddr3 ram 8GB (2 X 4GB) 1333Mhz ddr3 Sdram 2Rx8 Pc3 10600s Sodimm Pc3 10600 ddr3-1333 Pc3-10600S 204-Pin CL9 1.5V Non-Ecc Unbuffered for Laptop at Amazon.com