CPU FLUCTUATES IN CPU-Z

[sunshinewelly]

just got around to over clocking my 3570k and used the MB built in safe OC tool.

however on cpu-z my core clock jumps from 1600 to 4000 every second back and fore - it sticks to 4000 when running a game etc.

i assumed it would stay at 1600 when my pc was idle but it just jumps back and fore

 

[abui1806]

it's normal.

 

[VKleita]

Totally normal, some service asks for more performance, the cpu goes above a certain % of use and thus ramps up trying to anticipate future use, the task finishes and releases it request for cpu time, cpu returns to lower voltage mode to save power.

All totally normal

 

[tribz]

It might not be all cores that are ramping up, perhaps just one or two depending on need.

 

[Jamesyboyjim]

your cpu will underclock itself when its not doing anything to save on heat and electric and will ramp up every time it thinks it has something to do, in windows there are lots of processes that are always running so the cpu decides to jump up to speed to complete those tasks, basically

 

[snips86x]

Normal!

Mine goes from the likes of 800mhz when idle to 4.5ghz gaming!

 

[linktoinsanity]

It's normal as others have said. It's called Speedstep.

 

[Yaayuh!]

It's normal as others have said. It's called Speedstep.

 

[rossiboy001]

Think it can be disabled, so that your cores will sit on your overclock. Im sure I did mine some years ago, as my 2700k sits permanently on 4.5 ghz. Might change it back, but cant remember what it was called on the ud5 z77 Motherboard. but its sat at 4.5 ghz since i had it new.

 

[C64]

It's speedstep the voltage will also go down when idle if you use dynamic/adaptive voltage

 

[coupe69]

Think it can be disabled, so that your cores will sit on your overclock. Im sure I did mine some years ago, as my 2700k sits permanently on 4.5 ghz. Might change it back, but cant remember what it was called on the ud5 z77 Motherboard. but its sat at 4.5 ghz since i had it new.

Whilst disabling power saving features can sometimes enable you to get a higher stable overclock, do you really want to be wasting all that energy?

 

[Bantu]

It's definitely possible to disable it in BIOS but, as others have said, it's a decision whether the performance gains are worth the extra energy use.