I figure I would just sell my mom my old computer and build one from scratch. Do I need to buy some tools ? What's the best I can get for the money I'm willing to put out. I want a GTX 780 and I like FPS, plus the faster the PC the better. I like to game, do homework(not that I like to do it), and online use. The lower the price the better too.. my old computer is a Dell XPS 8500, if that helps in any way or I should take something out of it?