speedfan was designed to detect as many sensor chips as it can.
Problem is not all boards use all the sensor inputs, sometimes that causes strange temperatures to show up.
One on my boards has a CPUTin @ 60 all the time. Its just a bug ,but I still see it in different software(Speedfan/Hwmon).
If you just want temps/fan speeds(no control), Try Hardware Monitor. Lightweight and fast.http://www.cpuid.com/softwares/hwmonitor.html