Let me speak from first hand experience. I have the fx 6300 overclocked to 4.4ghz alongside a r9 280x and the asus m5a97 r2.0 motherboard. My friend has a fx 8350 (his temps are too high even with an aftermarket cooler so he can't oc until he get's water cooling) and a 7950 with the same motherboard. I beat him significanlty in every game benchmark and he is reduced to having to put his settings down to 1600x900 just to get anywhere near my results on ultra that I am getting at 1920x1080. So the lesson that can be learned is: the fx 8350 really won't give you too much of an advantage over the 6 core, it's the graphics card that matters the most. If you do end up making the sensible choice and getting an fx 6300, overclock it(or maybe don't; I'm not sure about that motherboard). Otherwise, get a 6350.