Thanks Mirage that helped a lot.

Yeah multitasking is pretty much what i was looking for. I have programs like photoshop, premiere and after effects and sometimes need to run all three, including music running in the background etc. Im currently not looking to upgrade my CPU, i dont trust myself enough on the hardware side of things to change it myself, so im gonna wait a year or so and get a much better one if everything else on my computers hasnt already been outdated, and get my brother to swap it without me breaking the pins .

Im getting 4GB cause its the maximum my OS can take.