AMD FX-8350 4.5ghz voltage?

Hey, I want to get my 8350 overclocked to around 4.5ghz, but I'm not sure whether I should change the voltage or not. any suggestions? 

Well mine runs stable at stock voltage. But run a stress test without changing the voltage, if it crashes, bump the voltage slightly until it no longer crashes.

I can't suggest a voltage as every chip is slightly different, Silicone Lottery I am afraid. 

- zanginator