Welcome tho OCN IMO the older AMD CPUs don't get very high overclocks compared to Intel. Doesn't mean you cant try anyways! You have pretty good hardware I think if you keep it cool you should get a good OC. AMD rigs take far more tweaking to get good results. Since most Intels dont have HTT and such. Try 20-30mhz at a time keep temps under 55-60c and vcore under 1.45-1.50v 24/7 see how it goes. Make sure to fully stress test it with Orthos.
Check the AMD CPU section should be plenty of info there to help.