OWC 32GB (2 x 16GB) PC21300 DDR4 2666MHz SO-DIMMs Memory, Compatible with Mac Mini 2018, iMac 2019 and up, and Compatible PCs, (OWC2666DDR4S32P) at Amazon.com
parts-quick 64GB Memory for Dell PowerEdge R750xs Rack Server 2RX4 Compatible DDR4 ECC RDIMM 3200MHz RAM (Cascade Lake, Ice Lake & AMD CPU only) at Amazon.com