Crucial 16GB Kit (2 x 8GB) DDR4-2666 SODIMM Memory for Mac | CT2K8G4S266M | Crucial.com
G.Skill Ripjaws X Series 16 GB (2 x 8 GB) 240-Pin SDRAM (PC3-12800) DDR3 1600 CL10-10-10-30 1.50V Dual Channel Desktop Memory Model F3-12800CL10D-16GBXL at Amazon.com
VENGEANCE® Pro Series — 16GB (2 x 8GB) DDR3 DRAM 1600MHz C9 Memory Kit