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
Crucial CT2K8G4DFS8266 2x8GB DDR4 2666 MHz DIMM Memory Module Kit for sale online | eBay
Apple Memory Module 16GB DDR4 2666MHz SO-DIMMS (2x8GB) - Apple
NEMIX RAM 16GB (2X8GB) DDR4-2666 PC4-21300 ECC RDIMM Registered Server Memory Upgrade with Dell PowerEdge R740xd2 Rack Server - NEMIX RAM
Patriot Signature Line Premium 16GB (2 x 8GB) DDR4 2666 (PC4 21300) Desktop Memory Model PSP416G2666KH1 - Newegg.com