I'm looking to swap out a few parts of my PC and make it more powerful as I mainly use it for 3D graphics (CG). I'd like to future-proof it too. I know a bit about computers, but not much, so I'd really appreciate advice on what can be done with this. Ideally I'd like to be able to get up to 12+ GB RAM and maybe even 8+ cores. Can this be done or, if not, what would be the best upgrade path?