I currently use a Dell XPS One 2720. It is great for editing, processing, and rendering. But the only problem I have with it is that it has a very poor GPU. Because of its amount of Ram, storage, and having a I7 4770S, I don't want to buy a whole new PC just to play some games.. Instead, I was looking into purchasing a external graphics card. My question is, Would it work with my PC, and if so.. what is there needed to connect one of these so it will perform well on my PC.