I have a http://www.newegg.com/Product/Product.aspx?Item=N82E16883227531&cm_re=Ibuypower_desktop-_-83-227-531-_-Product which is pretty awesome but I need a new GPU, this one sucks. The comp has a mad fx 8320 and 400 watt psu and gtx 650. Any ideas for a upgrade that would be cheap so I won't need a new psu