What are you using to read temps? I've had odd issues in the past getting readings on AMD APUs. If you haven't already, you may want to looking into AMD's Overdrive software and "thermal margin". I mention this as I was getting very high BIOS readings, and usual Coretemp, Speccy. ect. were giving me very high readings as well until I learned about this.
If this is not the case, you may want to check the mounting of your CPU cooler/thermal compound, fan speeds, and be sure you have good airflow in your case.