Crucial 8GB DDR4 SDRAM Memory Module - For iMac - 8 GB - DDR4-2666/PC4-21300 DDR4 SDRAM - 2666 MHz - CL17 - 1.20 V - Non-ECC - Unbuffered - 260-pin - SoDIMM

No matter how heavy and numerous the applications that you are using, 2666 MHz memory speed with Unbuffered signal will run them smoothly 8 GB of memory makes a perfect symmetry with your latest model processor and boosts up your computers performance DDR4 SDRAM interface multiplexes 2-bit data from memory cell and I/O buses to minimize processor idle time and enhance your computers performance