I have a FX 6300 OC to 4.7Ghz for the last 2 years, coupled with a GTX 760 MARS and it runs any game i throw at it with no problems. Used to have a 270x too and its a good mid-end card. You will be happy with it!
Got the R1 for almost 1 year now... You got to use lowprofile ram with it, i use hyperx fury and no problems with clearance. Temps are amazing and god it looks beautifull!!