My AMD 4800 cpu fullly load for a couple of hours ,then the temperature go up to 80C .My computer shuts down automatically for preventing from damaging the cpu.
well you'll need to clean up the case/fans, make sure airflow is good and that intakes/exhausts aren't blocked... also, you may need to replace the thermal paste and reseat the HSF
Please DON'T use a vacuum cleaner to clean your dust out will you!!!!!
They create static and we all know that static aint a PC's best friend!!
Blow the dust out instead with either compressed air can or I use a foot pump used for inflatable toys as it lasts forever and you can control the air flow better