All temp reading programs fail?

[sadbuttrue]

I've got an Asus P5KC and E5200 using Vista 64bit.

Every temperature reading program registers a different value (somewhere from 35 to 44), but this number NEVER changes from idle to 20minutes of load. There's no burning smell or excessive heat. The temperature also never changes from stock to overclocked. I'm somewhat puzzled.

 

[sadbuttrue]

Speedfan seems to be the only program able to report any change. I'm seeing CPU toggle between 35c and 37c, core0 between 44c and 46c and core1 stable at 44c. This is using orthos or prime95.

Is it common for this chip to have a faulty sensor?