HW Monitor 2 cpu temperature readings, which one is the most accurate?

[solidX1]

Hello, so the title says it all in HW monitor I can see 2 cpu temperature readings. The first is the MB sensor and the second is the CPU I suppose? Which one do I need to worry about? Which of these is the most accurate?

Thank you !

 

[chris987]

both are! cpu is socket temp <70C and package is core temp <60C in order to avoid any possible throttle! temps must be above 40c to get an accurate reading! expect socket temps to be higher than core temps!

 

[solidX1]

So the socket temp is the first one right? And that the one I should look out to when I overclock?

 

[chris987]

both socket and core voltages matter!

cpu is socket temp <70C and package is core temp <60C