It is little bit hot, some of CPU has max temp is 65C and other is 70C, because you don't post what CPU you have. But you can check it by yourself, for example, FX-6100 is 70C, like here: http://www.cpu-world.com/CPUs/Bulldozer/AMD-FX-Series%20FX-6100.html, go to the "Electrical / Thermal parameters", you can see "Maximum operating temperature= 70°C".
You can add the aftermarket cpu cooler to cool it down.