I have 4GB soldered RAM on my laptop. Should I add 4GB RAM or 8GB RAM? - Quora
What does it mean if a laptop has soldered RAM? It also has a regular memory slot. - Quora
can-i-use-below-ram-for-my-laptop-to-upgrade - English Community - LENOVO COMMUNITY
My laptop came with a 4GB DDR4 RAM (SODIMM) of 2400MHz. Can I add an additional 8GB DDR4 RAM (SODIMM) of 3200MHz? Or would it be similar to adding a RAM of
CMS 4GB (1X4GB) DDR4 19200 2400MHZ Non ECC DIMM Memory Ram Upgrade Compatible with NEC® PC Mate J Type MB, MB MK32M/MK37L - C116 at Amazon.com