OWC 8GB DDR3 1867 MHz SO-DIMM Memory Module (Late 2015 iMac Retina 5K) 8GB (1 x 8GB) Capacity, 1867 MHz Clock Speed, PC3-14900, 204-pin SO-DIMM, 1.35V, CAS Latency CL=11, Non-ECC, Unregistered, iMac Retina 5K (Late 2015) Compatible COMPUTER...