Well you are wasting money with the AM3+ platform. Its a dead end, and the 9590 is a waste of money (along with the money you have to invest in cooling and motherboard just to run it)
I doubt you will get any OCing out of that chip, as it is near its maximum already, as well as your motherboard having some manufacturer warning:
Due to the high TDP, please be noted there are limitations while using those CPU: (i.e. special thermal required..
FX-9370(FD9370FHW8KHK, 4.4GHz, 8C, L3:8M, 220W,rev.C0,AM3+)
FX-9590(FD9590FHW8KHK, 4.7GHz, 8C, L3:8M, 220W,rev.C0,AM3+)