4GB, LPDDR3-1867, PC3-15000, Non-ECC, Unbuffered, 1.35V, 204pin SO-DIMM.
Contains one (1) 4GB low power SO-DIMM memory module that is specifically designed and SPD configured for the October 2015 27-inch iMac with 5K Retina Display.
This module is compatible with the latest Apple Firmware.
Watch our installation video:
Click here for Apple's installation guide.