v-Color 32GB (2 x 16GB) ECC SO-DIMM DDR4 2666MHz (PC4-21300) for NAS Micro Server/Workstation/Compatible with Synology 21 Series 2Rx8 CL19 1.2V (TES416G26D819K-VKC) 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