16GB DDR4 - DDR4 RAM for Desktops - 2666MHz DIMM - VisionTek | Dell USA
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
acer SD100 16GB Single RAM 2666 MHz DDR4 CL19 1.2V Laptop Computer Memory - BL.9BWWA.210 at Amazon.com