CPU speed jumping up and down after Overclocking (using Software AXTU from Asrock)

[longmachao]

I'm trying to OC my i7 2600k, and set it to 4.0ghz at the moment. After trying out some heavy CPU games.. the software AXTU that come with Asrock board is showing that the CPU is jumping back and forth from 1.6ghz to 4.0ghz every few sec. I tried CPUZ and it also show me this ..except in interval of 15-20 sec. To make it clear the CPU was running at 4.0ghz like it suppose to while under load from the games and stress test (hyperpi), only when i close these application does this problem occur. THe CPU temperature on the other hand is cool like it should be at idle 1.6 ghz. I'm assuming while it is idle it is downclock my CPU to 1.6GHz.. But why does it show the erratic jumping in my CPU speed? Is this something i should be concern about? .. a lot of people told me OC cpu through software can sometime be wonky..is this what's happening here? THx in advance

* I have tried turning off speed step in bios.

 

[lonewolf7]

Try to down clock the CPU at it's stock speed, than see the results. If it is stable leave it. I don't think playing with BIOS without knowing what you are doing is a wise thing to do. SpeedStep is a power saving option for the processor. When it idles, the clock speed drops. If I disable SpeedStep on my processor, it will be always @ 2.8GHz, instead of idling @ 1.6GHz like it does with SpeedStep on. Disabling SpeedStep is a bad idea as it puts the CPU into a low performance mode (i.e. slower).

 

[Dylan1999]

its because of the performance needed at that particular time. If you are in game standing still, you wont need any graphics or cpu performance because there is no interaction between you and the computer. If you are running around shooting stuff, then you are interacting causing the cpu and gpu to work more. Hope this helps!