CT4G3S186DJM is a single 4GB DDR3/DDR3L SODIMM module that operates at speeds up to 1866 MT/s and has a CL13 latency. It is dual voltage and can operate at 1.35V or 1.5V. It is Unbuffered and is non-ECC. It conforms to the industry standard SODIMM layout of 204 pins. This module is RAM upgrade is made specifically for the iMac (Retina 5K, 27-inch, Late 2015) iMac17, 1 that uses one of the following processors: 3.2GHz Quad-Core Intel Core i5, 3.3GHz Quad-Core Intel Core i5, or 4.0GHz Quad-Core Intel Core i7. This particular upgrade may not be compatible for other models of computers. Please check for compatibility using the Crucial Memory Selector tool.
Increases system performance
Compatible with select Mac systems
All memory stick modules extensively tested at the component and function level
Meets or exceeds, Apple’s quality standards and requirements