RAM & Memory Upgrades
Timetec Hynix IC DDR4 2666MHz PC4-21300 Unbuffered Non-ECC 1.2V CL19 2Rx8 Single Rank 260 Pin SODIMM Laptop Notebook Computer Memory RAM Module Upgrade (2666MHz 64GB Kit(4x16GB))
DDR4 2666MHz PC4-21300 260 Pin Unbuffered Non-ECC 1.2V CL19 Dual Rank 2Rx8 based 2048x8
https://www.bizrate.co.uk/ram_memoryupgrades/timetec-hynix-ic-ddr4-2666mhz-oid35924740891.html