OWC 16GB (2 x 8GB) PC14900 DDR3 1866MHz SO-DIMMs Memory Compatible with 2015 (Late) iMac 27" w/Retina 5K Models and Compatible PCs (OWC1867DDR3S16P) at Amazon.com
JUHOR DDR3 Ram 16GB (8GBx2) 1600MHz PC3-12800 240-pin CL11 1.5V Non-ECC Unbuffered UDIMM Desktop Dual Channel SDRAM PC Computer Memory Module with Heatsink at Amazon.com
NEMIX RAM 16GB Kit (2x8GB Upgrade) DDR3-1600 SODIMM PC3-12800 for Apple MacBook Pro Mid 2012 / iMac Late 2012 / iMac 2013, Late 2014, Mid 2015, Mac Mini Late 2012 at Amazon.com
ADATA 8GB DDR3L/DDR3 1600MHz 204-Pin SODIMM Laptop/Notebook Memory RAM Low Voltage (ADDS1600W8G11-R) at Amazon.com
Silicon Power DDR3 16GB (2 x 8GB) 1600MHz (PC3 12800) 240-pin CL11 1.35V / 1.5V Unbuffered UDIMM PC Computer Desktop Memory Module Ram Upgrade 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