TEAMGROUP Elite DDR4 32GB Kit (2 x 16GB) 2666MHz PC4-21300 CL19 Unbuffered Non-ECC 1.2V SODIMM 260-Pin Laptop Notebook PC Computer Memory Module Ram Upgrade - TED432G2666C19DC-S01 at Amazon.com
Kimtigo DDR4 2666 8G Laptop Dram 2666MHz (PC4-21300) CL19 (Compatible with 2400MHz or 2133MHz) 1.2V Notebook 1Rx8 Single Rank 260 Pin SODIMM Laptop PC Computer Memory RAM(8GB) at Amazon.com
SAMSUNG M471A1K43CB1-CTD 2666MHz Memory Modules (8GB, 1 x 8GB, DDR4, 2666 MHz, 260-Pin SO-DIMM, Black, Green) 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
Amazon.com: PNY Performance 8GB DDR4 DRAM 3200MHz (PC4-25600) CL22 (Compatible with 2933MHz, 2666MHz, 2400MHz or 2133MHz) 1.2V Notebook/Laptop (SODIMM) Computer Memory Kit – MN8GSD43200-TB : Everything Else