1.    16 Oct 2017 #1
    Join Date : Jun 2015
    UK
    Posts : 2,096
    Windows 10 Home x64 (Laptop), Windows 10 Pro x64 (Desktop)

    CU Power Settings?


    I just upgraded my laptop to the CU and noticed there is a new option under Processor Power Management of Maximum Processor Frequency which is set to 0 MHz by default!

    What's this for and how should it be configured?

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  2.    16 Oct 2017 #2
    Join Date : Jan 2015
    UK, Midlands
    Posts : 11,001
    Win 10 Pro (1703)

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    Well, I'd say that's quite exciting... (!) -not to say obviously absurd.

    Needs reporting (Feedback app).
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  3.    16 Oct 2017 #3
    Join Date : Feb 2015
    Bamberg Germany
    Posts : 17,598
    Win10 Pro, Win10 Pro N, Win10 Home, Win10 Pro Insider Fast Ring, Windows 8.1 Pro, Ubuntu

    Quote Originally Posted by Steve C View Post
    I just upgraded my laptop to the CU and noticed there is a new option under Processor Power Management of Maximum Processor Frequency which is set to 0 MHz by default!

    What's this for and how should it be configured?

    Click image for larger version. 

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    Look through the tutorial and thread, specially this post: Create Custom Power Plan in Windows 10 - Page 2 - Performance Maintenance Tutorials
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  4.    16 Oct 2017 #4
    Join Date : Oct 2013
    Posts : 25,217
    64-bit Windows 10 Pro build 17040
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  5.    16 Oct 2017 #5
    Join Date : Jun 2015
    UK
    Posts : 2,096
    Windows 10 Home x64 (Laptop), Windows 10 Pro x64 (Desktop)
    Thread Starter

    Quote Originally Posted by Brink View Post
    Thanks. I hope I didn't prompt you to write this. I would have been clueless what the setting means without the help of this forum!
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  6.    16 Oct 2017 #6
    Join Date : Oct 2013
    Posts : 25,217
    64-bit Windows 10 Pro build 17040

    I was meaning to do a tutorial on this anyways, but this just reminded me.
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  7.    16 Oct 2017 #7
    Join Date : Jun 2014
    UK
    Posts : 1,051
    W10 pro x64 and W8.1 x86

    I find these settings a bit ambiguous tbh.

    Maximum frequency is a very specific parameter and yet Windows allows you to select values that are meaningless when related to the hardware in use.

    There is also 'Maximum processor state' which supposedly allows a set percentage of the systems maximum clock speed to be set. That would achieve the same thing surely ? A 2Ghz clock set to 1Ghz is the same as 50% of maximum. Windows also allows the 2Ghz clock to be set to 5Ghz or whatever which of course it and the rest of the system can not accommodate.

    I would assume all these systems and sub systems rely on the hardware being compatible and there is no indication of that. The same problem exists with the wireless adapter settings. Unless the required hardware and drivers are in place then nothing happens when you do alter things in good faith.
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  8.    16 Oct 2017 #8
    Join Date : Oct 2013
    Posts : 25,217
    64-bit Windows 10 Pro build 17040

    Yeah, normally you would not need to set this to anything other than the default "0" unless you just want to limit the processor frequency for whatever reason.

    You can confirm the frequency change by opening Task Manager, click on the "Performance" tab, and see what it shows for the CPU speed like below. It should be within what you set.

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  9.    16 Oct 2017 #9
    Join Date : Jun 2014
    UK
    Posts : 1,051
    W10 pro x64 and W8.1 x86

    Thanks Shawn.

    OK, I've done a little test and set the processor frequency to 400Mhz and then followed that up by a pretty intense simulation that should max things out. I have to admit the system felt slow, and I also timed the simulation which took nearly a minute to complete. That was slow compared to around 15 seconds or so I guess.

    I then set things back to '0' and re-ran. Back up to speed.

    So yes, it does do something although the numbers don't agree with task manager i.e set to 0.4Ghz and its running at 0.77Ghz. The last image is back up to speed.

    I'm surprised though. I stand corrected on that one It does do something.

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