if you can take a look on newegg dyi computers. look at amd and intel builds that are in your price range. as your on a small fixed build funds. I would look into a fm2 plus mb and amd new apu that dropping on jan 14. you might pay a little more for the apu chip but it be four core unit and have higher end gpu then the 7770. it also let you latter put in a better gpu for crossfire.