Another thing to consider is that prebuild model specific laptops usually have some sort of vendor specific driver requirement for the graphics card and will not take standard nvidia/amd issued drivers, it can be circumvented with modified drivers, but it's often easier to simply go with a laptop manufacturer that allows you to customize the loadout, because they generally take OEM parts and slot it all together rather than vendor-specific parts, Toshiba does the lockout thing a LOT (had to use modded drivers on most of the toshiba laptops ive owned).
The shitty part is most of the time they all but abandon driver support for laptops when they reach about a year old, so if you don't go modified driver you're stuck with really old driver versions.
