ThrottleWatch? is a utility for detecting and reporting the CPU throttling activity in Pentium 4, Xeon, and Pentium M processors. 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?: CPU Throttling Detection