Is this normal?

[garymcq23]

Hi I just overclocked my i7 2600k for the first time when I open CPU z it shows that my CPU is running at 4.5 MHz and multiplier at x45 but then when I run prime 95 my CPU drops to 4.1 MHz and the multiplier drops to x42

Is that normal?

 

[garymcq23]

It's a msi z68a-gd55 g3

 

[garymcq23]

I can't see anything in the bios saying turbo ratio could there be another name for it on my board

 

[garymcq23]

I've got a primary plane turbo power limit and secondary plane turbo power limit