Have you checked your CPU and other fan speed settings? Depending on what O/S and /or software that you are running, the fan speed is usually adjustable. Check the CPU temp and if proper under heavy load then you should be able to lower the fan speed while checking the CPU temp so as not to exceed the AMD user specified max temp. The max operating range for your CPU is 55C-71C internal core temp.
What is your case? How many fans does it have? How big are they? How are they configured?
In case you couldn't guess... Airflow is a cooling issue most people ignore.