How do i lock CPU speed?

I think we need to know the conditions to know why it's changing to give the best advice. If it's during a stress test, it could be from changing loads. Then you should use a different software. If looking in task manager, it's inaccurate. You should be using cpuz. There's no reason to turn off speedstep, cnq, or turbo if they are working correctly.
 
Apr 2, 2018
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I want it constant because it's constantly changing up and down when i want it to be at max frequency when doing something
 
Apr 2, 2018
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How do i turn off turbo boost and won't that make it slower if anything?