As to whether it’s possible to get certain apps use specific physical RAM sticks, I am not sure, but that seems unlikely and would probably require some very low level modifications to your operating system. But even before you get to that point you’d have to physically connect them to your new motherboard, which will only work if there are both free RAM slots on it, and your new motherboard has slots for the same generation of RAM that your old PC uses.

Just curious, what is the evil monopoly shit you’re referring to? Is it simply the fact they are effectively a monopoly in games distribution, and that in and of itself is bad, or are there more specific practices or actions you’re thinking of?