SO-DIMM Computer Memory (RAM) 64 GB Total Capacity for sale | eBay
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
Amazon.com: OWC 64gb (2x32gb) 2666MHZ DDR4 Upgrade Kit, OWC2666DDR4S64P (Upgrade Kit SO-DIMM PC4-21300 for Mac Mini (Late 2018)) : Everything Else