Some versions of speed fan have issues reading correct core temp. But if those are correct, then you better reinstall CPU cooler (so that you sure it do have a good contact) and enhance cooling. For cooling, you can find great tips from http://www.silentpcreview.com/
Here is a good alternatives for speed fan http://www.alcpu.com/CoreTemp/ and http://www.techpowerup.com/realtemp/
💡 LightUp 7.1 | SketchUp's only real-time renderer that uses object-based rendering
Download Trial
L