16GB DDR4 - DDR4 RAM for Desktops - 2666MHz DIMM - VisionTek | Dell USA
Timetec 8GB DDR4 2666MHz (DDR4-2666) PC4-21300 ( (PC4-2666V) Non-ECC Unbuffered 1.2V CL19 1Rx8 Single Rank 260 Pin SODIMM Laptop Notebook PC Computer Memory RAM Module Upgrade (8GB) 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