Corsair LPX 16GB DDR4 DRAM 2666MHz C16 Memory Kit CMK16GX4M1A2666C16 Black
Kimtigo DDR4 16GB Laptop Dram 2666MHz (PC4-21300) CL19 (Compatible with 2400MHz or 2133MHz) 1.2V Notebook (SODIMM) RAM Non-ECC Unbuffered Single Rank 260 Pin PC Computer Memory Module Upgrade at Amazon.com
Kingston 16GB DDR4 2666MHz Module at Amazon.com
Amazon.com: 【DDR4 RAM】 Gigastone Desktop RAM 16GB DDR4 16GB DDR4-2666MHz PC4-21300 CL19 1.2V 288 Pin Unbuffered Non ECC UDIMM for PC Computer Desktop Memory Module (Desktop ONLY) : Video Games
parts-quick 16GB Memory for QNAP TS-983XU-RP DDR4 2666MHz ECC UDIMM RAM at Amazon.com