HP 4GB 1Rx16 PC4-2400T Memory 854915-001 at Amazon.com
Beware of the single rank x16 RAM kits sneaked in some laptop models! The 1Rx16 modules have significantly lower bandwidth compared to the 1Rx8 variants - NotebookCheck.net News
FMB-I Compatible with 4YRP4 Replacement for Dell Dual in-Line Memory Module, 4gb, 2400, 1rx16, Ddr4, S PC4-2400 at Amazon.com
4GB DDR4 2666 (PC4 21300) 1Rx16 SODIMM Laptop Memory by NEMIX RAM at Amazon .com
SEYTED by_Micron MTA4ATF51264HZ-3G2J1 4GB DDR4 SO-DIMM 3200MHz 1RX16 Laptop Memory Bulk Sale (x5 Units) - OEM at Amazon.com