Comment 55 for bug 653770

Well , AMD claims that the Temperature is indeed unreliable and SW should not use it, that's why k10temp disables the monitoring.
See http://support.amd.com/us/Processor_TechDocs/41322_10h_Rev_Gd.pdf#74

the easy fix is to do:

Icreate /etc/modprobe.d/k10temp.conf

and just add

# force k10temp module to use the processor temp, even if it's unreliable
options k10temp force=1

and it will work the same as before.