HWMonitor is a hardware monitoring program that reads PC systems main health sensors : voltages, temperatures, fans speed.
In addition, it can read modern CPUs on-die core thermal sensors, as well has hard drives temperature via S.M.A.R.T, and video card GPU temperature. Special hardware monitors on power supplies serie are supported too. The program does not copy any file in any directory, neither writes in the registry.
News and corrections
Intel SandyBridge processors support: package temperature, Core/GT power
real-time power meters
AMD Llano (K12) and Bulldozer (K15) processors support