The latest, 1.28.What version of hwmonitor is it? The package power for example is completely wrong.
HWiNFO64 reads the same as RealTemp.I'm seeing consistent temps on my 3770K / P8Z77-V:
The middle one is HWinfo64 which is what I normally use, the other two I downloaded just to test this.
Do you know which program is giving correct readings in your case? You could test with HWinfo64, see what it says.
Also, I'm wondering if motherboard chipset drivers have a role to play in sensor readings.