256GB (4x64GB) DDR4-2666 ECC RDIMM RAM Upgrade Kit – Mac Pro 2019 /iMac Pro 2017
This256GB RAM upgrade kit is designed for maximum performance inApple Mac Pro (2019) andApple iMac Pro (2017) systems. Also works in ECC-compatible workstations and servers that support DDR4 ECC RDIMM.