Amazon.com: Crucial 8GB Single DDR4 2666 MT/s (PC4-21300) SR x8 DIMM 288-Pin Memory - CT8G4DFS8266 : Everything Else
ADATA 8GB DDR4 2666 (PC4-21300) SODIMM 260-Pin Laptop Memory Module Single Rank 2666MHz 8GB at Amazon.com
G.Skill Ripjaws V Series 32GB (2 x 16GB) 288-Pin SDRAM (PC4 21300) DDR4 2666 CL15-15-15-35 1.20V Dual Channel Desktop Memory Model F4-2666C15D-32GVR at Amazon.com