RMSA3300ME78HBF-2666 16gb Pc4 2666MHz DDR4 So-Dimm Non-ECC 260 pin 1.2V Ram Memory for Laptop and All in One Desktop Computer (16gb Pc4 2666MHz DDR4 So-Dimm) at Amazon.com
Crucial Memory Bundle with 32GB (2 x 16GB) DDR4 PC4-21300 2666MHz SODIMM (CT2K16G4SFD8266) Compatible with Latitude 5500, 5580, 5590, 5591, 7200, 7280, 7290, 7300, 7390, 7400, 7480, 7490 at Amazon.com
NEMIX RAM 32GB Kit (2 x 16GB) DDR4-2666 SODIMM 2Rx8 Memory for ASUS All-in-One PCs at Amazon.com