Mmoment 8GB DDR3 1600MHz UDIMM PC3-12800 1.5V CL11 Non- ECC Unbuffered 240-pin (2Rx8 / Dual Rank Base on 512Mx8) PC Computer Desktop Memory Upgrade Module at Amazon.com
Silicon Power Hynix IC Compatible for Apple DDR3 DDR3L 16GB (2 x 8GB) RAM 1600MHz (PC3 12800) 204 pin CL11 1.35V Non ECC Unbuffered SODIMM Laptop Notebook Memory RAM Module Upgrade at Amazon.com
OWC 12GB (8GB+4GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit Compatible with iMac, Mac Mini, and MacBook Pro (OWC1600DDR3S12S) at Amazon.com