CPU Multiplier Issue? Help Please.

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Dec 4, 2014
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I am trying to overclock my i5-3570K. I am using CPU-Z to monitor my hardware.
I am confused as under the multiplier section it has x16.0 ( 16 - 41 ) and it sometimes jumps to x33.0 ( 16 - 41 ) for a brief instant. I don't understand why the multiplier isn't set to the singular value of 42 because that is what i put into the bios.
Also, the voltage continues to fluctuate despite my setting it at 1.2V in the bios.

If someone can help me understand what I have done wrong, i would be grateful.