If you are overclocking a Intel K series cpu.
In the bios of your motherboard turn off the turbo boost feature.
Also disable the Intel speed setp cpu option.
Set the required multiplier value you wish.
Bclk x multipler = overall clock speed, overclock of cpu 200Mhz x 20 = 4.0 ghz.
Set the power plan profile in windows to high performance, and apply.
Both should then read 4 Ghz cpu speed.
It will run at a constant 4Ghz clock speed for the cpu all of the time.