How can I see how much my CPU is being throttled?

Solution 1:

Windows 7 has a tool called Resource Monitor which shows this. You can launch it by pressing Windows+R to bring up the Run dialog, then type perfmon.exe /res and press Enter.

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On the CPU panel, the Maximum Frequency (small blue graph) shows at what power the CPU is currently operating.

Solution 2:

I like using CoreTemp. It runs as admin, but it's free and signed by GlobalSign in the authors name.

What's cool is seeing how throttling conserves energy. Here's an example:

ThrottledUnthrottled