Kingston 32GB ECC Reg DDR4 2666MHz (KTH-PL426/32G) at Amazon.com
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
32GB DDR4-2666MHZ Non-ECC CL19 SODIMM 2RX8 at Amazon.com
CORSAIR VENGEANCE RGB PRO 32GB (4x8GB) DDR4 2666MHz C16 LED Desktop Memory - Black at Amazon.com