Download latest version of
CORE TEMP,
Core Temp
and see UR idle temp is 45C and LOAD 70C, I think tool U r using to moniter is reporting 85C Tjunction. Download Orthos and run small FFTs -
http://www.techpowerup.com/downloads/385a/orthos_exe_20060420.cab
If I m right that temps r 45 and 70C, then U need to apply good thermal paste and mount heatsink properly.