What cpu temp do i trust??

[tommyov]

im useing two different monitors real temp & cpuid hardware monitor im runing a i7 870 overclocked @4.0ghz on a e.c.o water cooler

real temp is 39c/41c at idle

cpuid is 49c/50c at idle

what do i trust?? plz respond thx for your time..

 

[tommyov]

just downloaded coretemp and its agreeing with real temp?

 

[tommyov]