Samsung M471B5273CH0-CH9 4gb Ddr3 1333mhz Pc3-10600 204-Pin Non-Ecc at Amazon.com
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
16GB DDR4-2666 PC4-21300 ECC SODIMM Compatible with Synology D4ECSO-2666-16G Memory Upgrade Module by NEMIX RAM 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
LEVEN DDR4 8GB KIT (2x4GB) 2666MHz PC4-21300 CL19 Unbuffered Non-ECC 1.2V UDIMM 288 Pin PC Computer Desktop Memory Module Ram Upgrade- Lares(JR4UL2666172408-4Mx2) at Amazon.com