ThrottleWatch 2.0 is out ! This already popular freeware detects CPU "throttling" due to overheating. New version 2.0 also tracks changes to your CPU core speed and voltage made by Intel SpeedStep and AMD Cool'n'Quiet technologies. The amount of heat a CPU produces varies according to the processing load. In situations of high sustained load (such as performance benchmarks, etc...), a CPU may produce more heat than the cooling mechanism is capable of removing, and reach a high enough internal temperature to trigger throttling.

ThrottleWatch? monitors and graphically displays both the CPU load and any throttling that occurs.

ThrottleWatch? 2.0: CPU Throttling Detection