64GB (16GBx4) DDR4-2666MHz iMac Memory for the 27-inch Retina released in March 2019, Model ID 19,1. The 21.5-inch iMac Models are not user-upgradable.

Contains four (4) 16GB Low Power SO-DIMM memory modules that are specifically designed and SPD configured for the March 2019 27-inch iMac with 5K Retina Display.

This module is compatible with the latest Apple Firmware.

• Total Capacity: 64GB (16GBx4)
• Data Rate: 2666MHz
• Bus Speed: PC4-21300
• Form Factor: DDR4 Non-ECC, Unbuffered, SO-DIMM
• No. of Pins: 260
• Module Ranks: Single Rank, Low Noise 8-Layer PCB
• Voltage: 1.2V
• CAS Latency: 17
• Features: True DDR4 Major Thermal Tested
• ROHS Certified, Compliant with JEDEC specifications