Windows 10: Overclock cpu max frequency constantly changing in task manager

Discus and support Overclock cpu max frequency constantly changing in task manager in Windows 10 BSOD Crashes and Debugging to solve the problem; Hi, I'm overclocking my Intel 8700k to 5Ghz and every time I check the current frequency in task manager the max is constantly changing. I have... Discussion in 'Windows 10 BSOD Crashes and Debugging' started by SackHappy, Nov 25, 2018.

  1. SackHappy Win User

    Overclock cpu max frequency constantly changing in task manager


    Hi,

    I'm overclocking my Intel 8700k to 5Ghz and every time I check the current frequency in task manager the max is constantly changing. I have high-performance power settings on windows enabled and I have also disabled CPU state and Intel SpeedStep in the BIOS. I also noticed that when using other tools to display my GPU and CPU performance they show my CPU max frequency is exactly 5Ghz, why does Task Manager constantly display a constantly changing frequency?

    Any suggestions?
    Much appreciated

    :)
     
    SackHappy, Nov 25, 2018
    #1
  2. sbrm1 Win User

    Why the cpu frequency shows differently in Win10 task manager and system properties?

    Your CPU is an 'Intel(R) Core(TM) i5-4300I CPU @ 1.90GHz' with '@ 1.90GHz' as a part of that name. Which means that the processor's base frequency1 of your CPU is 1.90 GHz. But here the CPU is telling the system that it's running at 2.63GHz.

    For some other CPU's I would have said its overclocked, but your CPU model has a feature known as Turbo Boost2 which enables it to automatically overclock to a higher yet safe frequency based on certain conditions.

    The Turbo Boost frequency for your CPU is 2.90 GHz, which means your CPU can attain that frequency under certain conditions but is currently running at 2.63GHz.

    Also, Windows calculates the max frequency of your CPU to be 2.50GHz as different algorithms are used to measure processor speed. For example, the algorithm used by Intel in its branded maximum speed is different than the algorithm used by Task Manager to directly measure the speed of the CPU. You can use other processor utilities, such as the Intel Processor Identification Utility or CPU-Z, for additional processor speed measurements.

    Also note that Hyper-V as well as VMware is reported to interfere with the clock speed calculation of Task Manager.

    I'd stick with CPU-Z for measuring CPU frequency as it's calculation algorithm is much better.

    Notes:

    1. Processor Base Frequency describes the rate at which the processor's transistors open and close. The processor base frequency is the operating point where TDP is defined. Frequency is measured in gigahertz (GHz), or billion cycles per second.
    2. Intel® Turbo Boost Technology accelerates processor and graphics performance for peak loads, automatically allowing processor cores to run faster than the rated operating frequency if they’re operating below power, current, and temperature specification limits. Whether the processor enters into Intel® Turbo Boost Technology 2.0 and the amount of time the processor spends in that state depends on the workload and operating environment.

    Sources:

    1. https://goo.gl/obtiWG
    2. https://goo.gl/MUtlOr
    3. https://goo.gl/a9Ga3h
    4. https://goo.gl/FotxKq
     
    sbrm1, Nov 25, 2018
    #2
  3. sco907 Win User
    Stuck CPU Frequency - Win10x64 intel i5 2500k

    I just upgraded to Windows10 from 7, though I don't honestly know if this issue was caused by the upgrade, I noticed in task manager that CPU frequency was constantly being reported as 1.6GHz, despite the official 2500k speed being 3.3Ghz, and my motherboard
    having overclocked it to 4.2GHz.

    Further testing has confirmed that this seems to be the case using the asus tools, open hardware monitor and cpuz.

    I have tried un-overclocking the system, rebooting, changing the power seetings to high performance, nothing has changed this.

    When I boot into linux with the same settings (using a different hard drive) the cpu speed scales up to 4.GHz and down just fine, so I do not think it is a hardware issue. And the temp never exceeds ~62C, with a max of 99C and the fans not even all the way
    reved up I don't think heat is a concern.

    I have no stability issues. I am seeing slowdowns from having my processor run at almost 1/4 speed in Windows though.

    Any suggestions would be appreciated.

    All driver updates, windows updates, bios updates done

    My system:

    desktop

    processor: intel i5 2500k

    motherboard: asus P868-Z

    Memory: 16 GB
     
    sco907, Nov 25, 2018
    #3
  4. Andrew M Win User

    Overclock cpu max frequency constantly changing in task manager

    CPU Constantly at 100% In Task Manager, But Not in Process Explorer

    Starting yesterday, I have a very odd problem on my Windows 10 desktop-- my CPU is constantly running at 100% (according to Task Manager), and it isn't throttling down. Because of this, it's constantly running at 3.3 GHz and the temperatures are rising to the point where the fans kick in at full force. If I go into the Windows power settings screen and manually change the processor power maximum to 50%, then it's capped at 50% frequency (~1.5 GHz), but it never goes below the maximum possible frequency.

    The weird thing is, when I look at the process list, there isn't really anything obvious that's triggering it. None of the processes are abnormal, and though the process CPU percentages do add up to 100%, it doesn't make sense to me that each individual process is taking up as much CPU as Task Manager says it is. Everything seems to be "using" a significantly higher amount of CPU resources than it normally does.

    As an attempt to diagnose the problem, I've also tried using Process Explorer. The really weird thing is that Process Explorer shows only 1-2% usage when idle, with the System Idle Process taking up the remaining ~98% as I would expect. Again, nothing looks out of the ordinary in the process list, but the processes are showing the levels of activity I would expect in Process Explorer.

    I've already run both Windows Defender and Malware Bytes (a virus was my first guess), but nothing has turned up yet.

    This same issue also occurs in Safe Mode, so I'm guessing that it's more along the lines of something to do with Windows itself...

    So, to recap:

    • Windows 10 Desktop
    • Intel 970, 3.3 GHz, 6 cores
    • Task manager and resource monitor graphs shows 100% usage total
    • No individual process is taking up significant resources in the resource monitor list
    • CPU is not throttling down automatically based on the dynamic load, causing high temperatures and the fan to kick in
    • Process Explorer is only showing 1-2% CPU usage

    Before I go uninstalling everything, how would I figure out what's causing the issue if nothing weird is showing up in Task Manager or Process Explorer?
     
    Andrew M, Nov 25, 2018
    #4
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Overclock cpu max frequency constantly changing in task manager

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