Timetec 128GB KIT(4x32GB) Compatible for Apple DDR4 2666MHz for Mid 2020 iMac (20,1/20,2) / Mid 2019 iMac (19,1) 27-inch w/Retina 5K Display PC4-21333 / PC4-21300 CL19 SODIMM Memory MAC RAM Upgrade

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Compatible For Mid 2020 iMac w/ Retina 5K Display model ID: iMac 20,1 (i5 3.1GHz, i5 3.3GHz, i7 3.8GHz, i9 3.6GHz)
Compatible For Mid 2020 iMac w/ Retina 5K Display & AMD 5700 XT Video Card model ID: iMac 20,2 (i7 3.8GHz, i9 3.6GHz)
Compatible For Early 2019 iMac w/ Retina 5K Display model ID: iMac 19,1 (i5 3.0GHz, i5 3.1GHz, i5 3.7GHz, i9 3.6GHz)
DDR4 2666MHz PC4-21300/ PC4-21333 Unbuffered NonParity Non-ECC 260 Pin 1.2V CL19 Dual Rank 2Rx8 based 1024×8 Module Size: 128GB Package: 4x32GB
Wait 30 seconds for your iMac to recognize the new memory; Guaranteed – Lifetime warranty from Purchase Date Free technical support