it supports dual graphics with hd 66**/r9 260 (not x models)
stick with either the r9 270 or if you can stretch the budget to $160 ($140 after rebates - not sure if these are worthless or not as Im in the UK) then this is a solid buy - very very decent mid range card
http://www.newegg.com/MSI/BrandStore/ID-1312
if you werent interstd in the free games you could most likely get a good $30-$40 for the download code for the games. (it comes with the 3 game gold edition reward code which is normally only for 280x cards upwards)