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
Corsair CMSA8GX3M1A1600C11 Apple Certified 8 GB DDR3 1600MHz (PC3 12800) Laptop Memory 1.35V at Amazon.com
Corsair Apple Certified 16 GB (2x8 GB) DDR3 1600MHz (PC3 12800) Laptop Memory 1.35V at Amazon.com
Corsair Vengeance Pro Series 32 GB (4 x 8 GB) DDR3 1600 MHz CL9 Red - PC RAM Corsair on LDLC | Holy Moley
Corsair Apple Certified 16 GB (2x8 GB) DDR3 1600MHz (PC3 12800) Laptop Memory 1.35V at Amazon.com