While the 970 is pretty decent (even now that the 1000 series is out), the FX CPU will really hold you back...
FX suffers from low IPC, meaning that you don't get to use all of that 4.0GHz. Some of it is taken up by internal functions within the CPU, making it feel like a 3GHz quad core i5 with no hyperthreading.
I recommend replacing the CPU and motherboard before expecting good performance in games.
Don't even think about the 9590. Some boards claim to support it, but none really can provide the power it needs, so it throttles because of limitations in power delivery. Then there's heat output. 220 watts of it. Just. no.