I would not worry about adding any strong graphics card to your motherboard.
You would need a decent 600w psu to run it.
http://www.realhardtechx.com/index_archivos/Page362.htm
I do have a real concern about the card you listed, along with other R9-280X cards.
The newegg negative reviews from verified buyers are 45% negative(0 or 1 egg)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202061
I suggest the GTX970 which is a stronger performer that is quieter and uses less power(500w).
You might pay a bit more, but it is an excellent value. They are in demand, so you may have to shop a bit.