parts-quick 16GB Memory for QNAP TVS-872XT Compatible RAM DDR4-2666 SO-DIMM at Amazon.com
HyperX Fury 16GB 2666MHz DDR4 CL16 DIMM (Kit of 2) 1Rx8 Black XMP Desktop Memory HX426C16FB3K2/
Sam Original 16GB (1x16GB) DDR4 2666MHz PC4-21300 SODIMM 2Rx8 CL19 1.2v 260-PIN Laptop Notebook Memory Module RAM Upgrade M471A2K43CB1-CTD Adamanta at Amazon.com
G.Skill Ripjaws V Series 16GB (2 x 8GB) 288-Pin SDRAM (PC4-21300) DDR4 2666 CL15-15-15-35 1.20V Dual Channel Desktop Memory Model F4-2666C15D-16GVR at Amazon.com