I currently own an HP Envy H8-1534 computer. I'm finally getting around to where i want to upgrade the graphics card. Now, from my understanding, I'll need to upgrade my power supply as well. If that's the case, that's fine. My main question is, what would be a good power supply that would work in my computer (if i need one) and also, what would be a good graphics card that would fit and work with my computer as well? I don't really have a price range, but if possible would like to stay around $300 or less for the graphics card. It doesn't have to be the newest, best graphics card on the market, but i'd like to have something that will run fine in my computer and that will allow me to play any game. It doesn't have to be on ultra setting for every single game or anything, but it'd be nice to play games without having to worry about whether my pc will run it or not. Also, http://support.hp.com/us-en/document/c03639067 that is the computer i currently have.