Since I upgraded my PC To a Asus MOBO And an FX 6300 my MOBO temperature under load were 64c, is that under the OK side of things or it can be a problem? Cpu never goes higher than 65c and my gpu goes about 60.
OK - you need to re-seat the cooler. Clean off the old thermal paste with isopropyl alcohol and put a pea size drop of new arctic silver 5 in the centre of the cpu and re-assemble the cooler an fan back on.
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