Amazon.com: Crucial 8GB Single DDR4 2666 MT/s (PC4-21300) SR x8 DIMM 288-Pin Memory - CT8G4DFS8266 : Everything Else
16GB Memory for HP ProOne 600 G4, 600 G5, 600 G6 All-in-One DDR4 2666 MHz RAM | eBay
OWC 16GB (2 x 8GB) PC21300 DDR4 2666MHz SO-DIMMs Memory Compatible with Mac Mini 2018, iMac 2019 and up, and Compatible PCs (OWC2666DDR4S16P) at Amazon.com
Total Micro Memory, HP EliteDesk 800 G4 Tower - 16GB 2666MHz DDR4 UDIMM - 3TK83AT-TM - -
8GB (1X8GB) Compatible Memory for HP ProDesk 600 G5 MT, 600 G5 SFF DDR4-2666 Non-ECC Unbuffered DIMM RAM (PARTS-QUICK Brand) at Amazon.com
Crucial 8GB Single DDR4 2666 MT/s (PC4-21300) SR x8 DIMM 288-Pin Memory - CT8G4DFS8266 : Everything Else - Amazon.com
HP 8GB DDR4-2666 DIMM 288-Pin | For 290 G2, 705 G4, 800 G4, 400 G5, 600 G4 - Walmart.com