8GB (2 x 4GB kit) OEM RAM Memory for Apple iMac Retina 5K 27 inch (Late 2014) Core i5 / i7 PC3-12800 DDR3-1600MHz 204-Pin SoDimm
MT18KSF2G72HZ-1G6A2 Micron 16GB PC3-12800 DDR3-1600MHz ECC Unbuffered CL11 204-Pin SoDimm 1.35V Low Voltage Dual Rank Memory Module