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
ADATA 8GB Premier DDR4 2400MHz 260-pin SO-DIMM Laptop Memory Single (AD4S240038G17-S) at Amazon.com
HP 8GB DDR4 SDRAM Memory Module - 8 GB - DDR4 SDRAM - 2666 MHz DDR4-2666/PC4-21333 - ECC at Amazon.com