Ya best I can get with uncore is 44 or I lose prime stability regardless of voltage. Not ideal but not as bad as yours apparently. Are you delidded? I know if I was limited by heat I wouldn't be able to do 4.6, not even close. The 1.47v it takes on air or without a delid would have melted it long ago The chips are resilient voltage wise, so long as you can keep it cool.