First of all you are posting this in totally wrong place.
The correct place for such questions is this:
Baldur's Gate III - Technical & Gameplay ProblemsSecondly no offense, but your old RAM from old laptop is perhaps not even supported by your new laptop so if that is the case then it is impossible it would work.
Even if it would work then RAM would work with the slowest RAM speed to my understanding so not good idea at all to do this.
You can not simply add some old RAM you must see what RAM your new laptop uses... and it should be exactly same kind of RAM and speed.
It is not my job or task how to add RAM to an latpop I will not do that and in the process if wrongly done you can:
A. Loose your warrantry perhaps maybe.
B. Do damage to your new laptop.
Well so no I refuse to give some instructions sorry.
However you could ask a professional store and ask them if they could sell RAM and install it or better idea would
have been to buy from the beginning good enough GAMING computer. BG3 is releaed likely in year 2023 so no hurry to buy new computer.
However I think you are so lost in this process (do not get me wrong I kwow absolutely nothing of a car engine totally novice in that).
Usually when it is lapop people buy a GAMING LAPTOP with enough memory 16 GB RAM DDR4 and good enough graphiccard and good enough CPU (prossror).
I am sorry I feel you do this wrong way. You should know all detailes grahiccard , RAM and CPU.
Example here are 2 desktop computers:
Players with good enough hardware for BG3 maximum graphics FULL HD despite graphiccards are old:
Nice! Comparison:
You lady andromedia087 have
CPU released 2021 so quite new CPU.
INTEL I5 11400 with TURBO speed 4,6 GHZ and 6 cores and 12 threads.
Mine is released 2018 CPU and that year 2018 I bought it.
AMD RYZEN 5 2600 X with in TURBO speed 4,2 GHZ 6 cores and 12 threads.
Congratulations you lady andromedia087 have faster CPU then mine not that there is practical difference in BG3, but some other games. Both seems good enough for BG3 FULL HD maximum graphics at least.
Your lady andromedia087 RAM
16 GB DDR4 3200 MHZ
My RAM:
16 GB DDR4 3200 MHZ
You lady andromedia087 have Nvidia 1080 8 GB DDR5 that is nice released 2017 and still good enough for FULL HD graphics and certainly good enough for BG3.
I have also graphiccard released in 2017.
Nvidia 1070 Titanium 8 GB DDR5... that is slightly faster then Nvidia 1070, but your lady andromedia087 Nvidia 1080 8 GB DDR 5 is slightly faster then mine. That said I guess hard to notice difference in BG3 with FULL HD graphics.