Crucial Technology 16GB 204-Pin SODIMM DDR3L (PC3-14900) Server Memory Module for iMac 5K, CL=13, Unbuffered, 1866 MT/S Speed, Non-ECC, 1.35V, Late 2015 Crucial Technology 16GB 204-Pin SODIMM DDR3L (PC3-14900) Server Memory Module - Crucial Technology Lifetime Limited Warranty Memory Size: 16GB Memory Technology: DDR3 SDRAM Memory Voltage: 1.35 V Memory Speed: 1866 MHz