Task manager says 3.5GHz is 10% CPU usage?


  1. Posts : 32
    Windows 10 Pro
       #1

    Task manager says 3.5GHz is 10% CPU usage?


    title
    Last edited by nuuhyio; 01 Jan 2021 at 23:48.
      My Computer


  2. Posts : 2,935
    Windows 10 Home x64
       #2

    That's the real CPU speed. Above and right is showing running at 1.80GHz currently and 10% use.
      My Computer


  3. Posts : 32
    Windows 10 Pro
    Thread Starter
       #3

    Wait what? I thought this was the current speed
    (circled in image)
    Attached Thumbnails Attached Thumbnails Task manager says 3.5GHz is 10% CPU usage?-screenshot-124-copy_li.jpg  
      My Computer


  4. Posts : 2,715
    Windows 10
       #4

    There is nothing wrong with that, it is how modern CPUs work, particularly those for Laptops.
    The U series CPUs have a range of power saving measures which can involve clock speeds and core voltage.
    You don't have to worry as it will Turbo up as required by an application, and conversely clock down when not required, so your Laptop does not get so hot.

    The detailed Intel CPU specs will tell you what the range is.
    i7-8550U 1.80 GHz, shown top right, just a CPU name and nominal speed, never changes.
    Max turbo single core 4 GHz.
    Max turbo 4 cores 3.5 GHz(?).
    Lowest frequency 800 MHz(0.8 GHz).

    The TDP (thermal design power) can also be configured between 10w to 25w, thus suitable for a range of uses and so they don't have to make so many differing processors.

    The top left you have Highlighted is the CPU frequency, and usage at that point in time.
      My Computer


  5. Posts : 27,162
    Win11 Pro, Win10 Pro N, Win10 Home, Windows 8.1 Pro, Ubuntu
       #5

    The Task Manager is really pretty useless when looking at realtime perfomance.
    It doesn't poll fast enough to the BIOS to get any accurate reading.
    Which is good, because faster polling means alot more resources being used(same with Gaming Mice polling).
    Task manager says 3.5GHz is 10% CPU usage?-image.png
      My Computers


 

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