i personally hate speedfan. i use core temp. it gives accurate readings and you can log your temps. the only problem may be that it only tells you the cpu temp. also use cpuz to know everything else about your comp.
I have tried coretemp as well. It shows normal core 0 and 1 temps, but shows me that the Tjunction is 85C under idle or load, I don`t really believe that.
Is there a way to configure the Tjunction temp sensor in coretemp?
Enable PECI in your BIOS to get a correct reading from the mobo. PECI sends the data from the Digital sensor DTS on the cpu - the one used with TJunction.
Here's how C2D temps work. The DTS on each core is recorded as x many degress away from the junction point (can be 85C or 100C). Coretemps/speedfan etc use this formula to calc the temp; With a junction of 85 and a TJunction reading of 50, the coretemp is 35C
Temp measurement is not exact and is affected by how the mobo reads the DTS data