Hello, I am looking for a gaming PC build on a fairly tight budget of $500. This will be my first time building a computer and I would like some help choosing the parts so that I don't accidentally choose some things that aren't compatible. I will also have to buy an operating system with this $500, I'm thinking windows 8. Any example builds would be greatly appreciated, thanks! By the way, I already have a monitor, keyboard, and mouse so those can be excluded from the budget.