Throttlewatch: use this to check your cpu OC

[Mithrandir]

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.

When ThrottleWatch™ is minimized, an icon is added to the system tray area of the Taskbar. The color of the icon changes when throttling is detected.

There doesn't seem to be any mention of users checking their CPU overclock for throttling.
Not sure if anyone is using THIS but I heard its a good utility to check your CPU overclock.

[eunos_rsh]

cheers for that - useful.