^+1 - - Gigabyte works GREAT. And you'll find that all the best support comes from forums. Try getting Asus or some other manufacturer's representative to get back to you quickly and actually SOLVE a problem
or maybe your better off with this asrock 870 its cheaper and a recomended budget board, can xfire. x8/8x .Also you wont see much of a increase in x16/x16 only by 2% which is not so significant. so i recomend this board rather buying a 890fx.