What does the 1Rx8 mean vs. 2Rx8 for RAM and are they compatible? - YouTube
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
A-Tech 16GB Module for HP Pavilion 590-p0053w Desktop & Workstation Motherboard Compatible DDR4 2666Mhz