Since you already have an i7 it is very unlikely even if you could replace it that you would be able to find a faster one that would work. If you can change the video card depends on how its connected, look at it and see if it's in an MXM socket. Instead of trying to crack open the thing and possibly end up with a dead system, you should look into selling it and getting a newer system that can run what you want. A working slower laptop is better than a faster broken one.