I need something to replace my 630. My res is 1600x900. Budget $125. I saw a video on the 7790, and it looks like it performs pretty well, for the stuff that I would want to use with it.
Well i´d say spend 15 bucks more and get an r7 260x like this one,
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150689
or a cheaper option, the hd7770:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127687