v-Color 64GB(2x32GB) DDR4 2666Mhz RAM for iMac 2020 & 2019 27-inch w/Retina 5K Display iMac SODIMM Non ECC CL19 1.2V (TN432G26D819K-VC) at Amazon.com
DATARAM 64GB (2 x 32GB) 2666MHz DDR4 PC4-21300 SO-DIMM 260 Pin Memory Upgrade for 2018 Mac Mini (macmini18,1), 2019 27 inch iMac (iMac19,1) and PC laptops at Amazon.com
64GB KIT [32GB X 2 DDR4 2666 ECC REG] (PC4-21300) DIMM Registered by TTF Direct at Amazon.com
64GB Kit (2 x 32GB) DDR4-2933 PC4-23400 Non-ECC Unbuffered Desktop Memory by NEMIX RAM at Amazon.com
Crucial Memory Bundle with 64GB (1 x 64GB) DDR4 PC4-25600 3200MHz Registered Server Memory (1 x CT64G4RFD432A) at Amazon.com
2x32GB) 64GB DDR4-2666 (PC4-21300) SODIMM Memory Kit for Dell Precision 7530 at Amazon.com
SK HYNIX 64GB DDR4 LRDIMM PC4-19200 2400MHZ ECC Registered RAM HMAA8GL7AMR4N-UH at Amazon.com