you need to re-seat the cooler, clean off the old termal paste and use another one. No need isopropyl, you can clean it with cotton. Check if the voltage is ok from the bios and try to disable any overclock process. Some AMD cpu´s use to failure and the cpu starts to overheat all the time, even if you are using a "ms word" file. It´s very common when some psu are made with a not good quality