Running a GTX 570 in my rig i share with my little sister.
An RX480 would be a perfect upgrade for me and her considering the Gtx 570 isn't gonna last long anymore.
A good quality 500w (80+Bronze at least) is enough for a 8350 and a 7870 setup with a little oc. If a TX650 was enough to run my 7970 CF and a Fx8320
@4,2ghz. Just got the HX850 to OC more and Modular cables.