Similarly, the 'flame' icons are 'warning' parameters that just need to be calibrated. SpeedFan is not very 'straight-forward' and has a bit of a learning curve, but it can be manually calibrated for accuracy. The remaining +/-2☌ is simply due to a slight difference in sample timing between the two utilities at any given moment. This means SpeedFan is miscalibrated by -20☌, which is a known problem. If you compare the Core temperature values in SpeedFan with Core Temp, you can see that the difference is 18° to 22° which averages to 20☌ +/- 2☌. Moreover, SpeedFan is know to 'offset' or miscalibrate Core temperatures by either 15° or 20°. The 'Temp1' value you're seeing in SpeedFan is most likely a mislabeled VRM temperature. Core Temp and especially Hardware Info are frequently updated and widely trusted for their accuracy. Sorry to pop your bubble, but I'd like to point out that SpeedFan and RealTemp have been left to wither on the vine, and haven't been updated for many years.
