Pull the heatsink fan OFF and clean all parts with 91% or 99% alcohol. Do not use the 50% stuff you find in the supermarket; it contains lanolin and will leave a residue. Once all parts are clean and dry, apply new thermal compound IAW [in accordance with] the compound mfg's instructions. Reinstall the heatsink fan and test. If this is the amd system you asked about previously, install the retaining clips however do not lock down the cam lock. Give the cooler a few gentle twists back and forth; now lock the cam lock. Normal temp for those old amds 35~45C depending on ambient temp, case airflow, etc.