A-Tech 8GB Replacement for HP 797258-581 - DDR4 2133MHz PC4-17000 ECC Unbuffered UDIMM 2rx8 1.2v - Single Server Memory Ram Stick (797258-581-ATC) at Amazon.com
8GB (1x8GB) DDR4-2133MHz PC4-17000 2Rx8 1.2V SODIMM Laptop Memory by NEMIX RAM at Amazon.com
Kingston Technology 16GB DDR4 2133MHz Memory for Select Acer, Dell, HP/Compaq Desktops (KCP421ND8/16) at Amazon.com