Build check...

Your build works but you're spending too much on the motherboard and power supply. If you don't plan to crossfire, you will be fine with an antec earthwatt 650w: http://www.newegg.com/Product/Product.aspx?Item=N82E16817371044&Tpk=earthwatts%20650 Seasonic is simply awesome but it's way expensive. If you plan to crossfire then I would get: http://www.newegg.com/Product/Product.aspx?Item=N82E16817371049&Tpk=HCG%20750 and stick with your motherboard. Otherwise get something for around $110-130 instead. If you want to save more, you can purchase this set of ram instead: http://www.newegg.com/Product/Product.aspx?Item=N82E16820104266