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  1.    24 Oct 2016 #1
    Join Date : Jan 2016
    Posts : 45
    Windows 10 Pro 64 bit

    CPU speed at 0.48Ghz during low battery


    Hi,

    On my laptop, I have noticed that the CPU speed is dramatically reduced from 1.98Ghz to 0.48Ghz whilst low on battery. As soon as I plug the laptop in, the CPU speed returns to 1.98Ghz. This loss of CPU speed has a great impact on system performance, rendering the laptop near useless.

    My laptop is running an Intel Core i3, and I believe that the technology which controls the speed of the CPU is called SpeedStep. There is no option in the BIOS to turn this feature off. I have also tried to change this setting in the 'Power Plan' options (in Windows). I changed the minimum processor state to 100% and the cooling policy to 'Active'.

    I would like to keep my CPU running at 1.98Ghz. Any suggestions?

    (see this photo for clarification)

    Many thanks.
      My ComputerSystem Spec
  2.    24 Oct 2016 #2
    Join Date : Aug 2014
    Forever West
    Posts : 3,922
    Win10 Home and Pro, Win10 Insider Preview, Win7 Home, Linux Mint

    That can happen and is somewhat normal depending upon how the manufacturer implemented it. I have done it and seen others do it by changing the power scheme to an always-on Desktop. Of course that depletes the battery much faster. But then Windows takes a lot of its settings from what the BIOS makes available.
      My ComputerSystem Spec
  3.    24 Oct 2016 #3
    Join Date : Jan 2016
    Posts : 45
    Windows 10 Pro 64 bit
    Thread Starter

    Hi there,

    Many thanks for your reply.

    What do you mean by an always on power scheme? How would I go about enabling this?
      My ComputerSystem Spec
  4.    24 Oct 2016 #4
    Join Date : Aug 2014
    Forever West
    Posts : 3,922
    Win10 Home and Pro, Win10 Insider Preview, Win7 Home, Linux Mint

    Quote Originally Posted by soopg View Post
    Hi there,

    Many thanks for your reply.

    What do you mean by an always on power scheme? How would I go about enabling this?
    Haven't needed it but it worked on WinXP in the Power Options in Control Panel, just need to check Power Options, Balanced, Change plan settings, Change advanced power settings. Some Notebooks may not have exactly the same thing as brands can have their own version of controls.
      My ComputerSystem Spec
  5.    25 Oct 2016 #5
    Join Date : Jan 2016
    Posts : 45
    Windows 10 Pro 64 bit
    Thread Starter

    Hi there,

    Sorry, but I am still not sure what your point is.

    If I go to "Control Panel, just need to check Power Options, Balanced, Change plan settings, Change advanced power settings" and change the minimum CPU state to 100%, no change happens, as I stated in my original post. You can see my settings in the screen shot linked to the original post.

    Thanks
      My ComputerSystem Spec
  6.    25 Oct 2016 #6
    Join Date : Aug 2014
    Forever West
    Posts : 3,922
    Win10 Home and Pro, Win10 Insider Preview, Win7 Home, Linux Mint

    Guess it's time for a new machine but maybe try a new battery?
      My ComputerSystem Spec
  7.    25 Oct 2016 #7
    Join Date : Aug 2016
    S/E England
    Posts : 4,490
    10 Home x64 (1709) (10 Pro on 2nd pc)

    Quote Originally Posted by soopg View Post
    On my laptop, I have noticed that the CPU speed is dramatically reduced from 1.98Ghz to 0.48Ghz whilst low on battery. As soon as I plug the laptop in, the CPU speed returns to 1.98Ghz.
    Power management and battery saving isn't the only thing controlling the CPU speed, there's also the cooling policy. Passive cooling reduces clock speeds to keep the heat down while active cooling favours boosting the fan speed. You should see 'System cooling policy' in your advanced power management settings.
      My ComputersSystem Spec
  8.    25 Oct 2016 #8
    Join Date : Jan 2016
    Posts : 45
    Windows 10 Pro 64 bit
    Thread Starter

    Quote Originally Posted by Bree View Post
    Power management and battery saving isn't the only thing controlling the CPU speed, there's also the cooling policy. Passive cooling reduces clock speeds to keep the heat down while active cooling favours boosting the fan speed. You should see 'System cooling policy' in your advanced power management settings.

    Hi there,

    Thanks for both of your replies.

    Regarding Berton's reply, the laptop is only about a month old, so defiantly not time for a new one yet!

    As for Bree's reply, the 'System cooling policy' is now set to active. However, the laptop continues to go to 0.48Ghz when low on battery.

    Thanks again to both of you.
      My ComputerSystem Spec
  9.    25 Oct 2016 #9
    Join Date : Aug 2016
    S/E England
    Posts : 4,490
    10 Home x64 (1709) (10 Pro on 2nd pc)

    Quote Originally Posted by soopg View Post
    If I go to "Control Panel, just need to check Power Options, Balanced, Change plan settings, Change advanced power settings" and change the minimum CPU state to 100%, no change happens, as I stated in my original post. You can see my settings in the screen shot linked to the original post.
    Perhaps a silly question, but there's a 'Maximum processor state' setting there too. What's that set to?
      My ComputersSystem Spec
  10.    25 Oct 2016 #10
    Join Date : Aug 2014
    Forever West
    Posts : 3,922
    Win10 Home and Pro, Win10 Insider Preview, Win7 Home, Linux Mint

    A month old? Should be in warranty, battery also, 1-year unless extended was purchased. But most replacement batteries carry only a 1-year warranty.
      My ComputerSystem Spec

 
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