>>the soldered RAM limits the amount of total RAM that can run in dual channel mode
Can it affect running 3d modelling software, like CADs or Blender, on an integrated graphics card with shared (dynamic) memory?
As mentioned here [1], at least on a Dell XPS laptop while diy upgrading soldered RAM, it is necessary to resolder a resistor from 1 to 0 position on the board to tell BIOS what RAM to expect.
Maybe for E14 thinkpads it is also possible to perform a similar thing, to diy rewire the board to ignore the malfunctioning soldered RAM and use the socketed RAM instead. But how to get all the original thinkpad system board schematics?