What is my CPU Temperature

k10temp-pci-00c3 Adapter: PCI adapter

This sensor is provided by the k10temp kernel module which handles the AMD CPU, see http://lm-sensors.org/wiki/Devices. The related temperature is the CPU one. IIRC it8720, is a common chip on the MB, not possible to say more without manufacturer specification.

lm-sensors only reads raw data of the in-built sensors.

in fact there is no normalisation imposed to the manufacturers. (they can build how many sensors they want and where they want).

so in some case info is clear (like in previous example) in some others info is less pertinent. you can only make supposition. only the manufacturer could tell you.