I have been running 4.5 Ghz on 1.35 voltage for a while and things are fine. I now have it at 4.2 with 1.32V. I have been getting a little annoyed with my fans so I lowered the speeds on both CPU and Chassis fans. My temps went up and now I want to go back to my default voltage. What is the highest I can go approx? I'd want at least 4Ghz.