Pentium D 940 Fluctuating Multiplier

Username2324

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Oct 26, 2008
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I have a Pentium D 940 in my Dell, and have been experiencing slowness. Originally I thought it was my new HDD (which may still be a possibility) since I had not experienced it with my old drive , but upon downloading and using CPU-Z I can see that the multiplier is continually changing between 16x and 12x, causing the CPU speed to go between 3.2GHz and 2.4GHz.

Is this normal for the CPU? It seems to do it whether the CPU is being used or not (more frequently during use).