How to properly limit cpu usage in power options ?

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  1. Posts : 232
    Windows 10 HOME SINGLE LANGUAGE 21H1 19043
    Thread Starter

    I try to put 3000Mhz and cpu state minimum to 5% and maximum to 99% but it doesnt work and i change again the cpu state to maximum 100% it also doesnt work, the clockspeed still 3700Mhz in full load
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  2. Posts : 61,517
    64-bit Windows 11 Pro for Workstations

    mikelferdinan said:
    Should i put 3 or 3.0 MHz?

    And what should i put in minimum mhz if i put 3 in maximum ?

    You would enter 3 for 3 MHz.

    I'd say the default settings for min are fine since it's for what not to go below.
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  3. Posts : 18
    Windows 10

    Say we have these specs:

    Processor Base Frequency: 2.30 GHz
    Max Turbo Frequency: 4.00 GHz

    Obviously limiting maximum processor frequency to anything below 2.30 GHz should work, but would it work for values between 2.30 ~ 4? If yes, are there any steps for the values or any value will have a different impact?
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  4. Posts : 1,614
    Windows 10 Home

    I can vouch for RealTemp, it has a spot on my taskbar always showing core temps.
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  5. Posts : 870
    11 Home

    RolandJS said:
    I can vouch for RealTemp, it has a spot on my taskbar always showing core temps.
    Yes, but the author of RealTemp also has created ThrottleStop.
    The ThrottleStop Guide | NotebookReview

    Minor caveat: he seems to (wrongfully) think that setting the BD PROCHOT flag to disabled is safe to do on any laptop. Please don't do this! As for the reason why you shouldn't, it's really, really very simple, but requires some lengthier information. Laptop designers don't always design the cooling system in such a particular way that can sustain peak performance and the resulting amount of heat generation. You see, how Speed Shift works on Intel mobile CPUs like Sky Lake or Kaby Lake or later, it offers the ability to let the CPU automatically ramp down the clock after it lets the clock attain maximum speeds for a period of time the duration of which can also be limited.

    In short, after sufficient time has passed to give the localized heat buildup─that occurs as a result from this 'burst' of relatively high power consumption─enough chance to be spread out and be eliminated via the cooling system to the extent that the designer of the laptop has found to be adequate, the system has cooled down to the point where the CPU can allow another burst. These bursts can be intelligently (hence it's called Intel...) used to achieve snappier, more responsive, user experiences the real-world effect of which is, during the most common tasks, closer to a desktop PC type of performance level.

    However, if the goal of the laptop designer is to make it less heavy and less bulky than, say, the biggest of Asus ROG laptops that weigh a ton, then it can still happen that aforementioned bursts keep occurring in too rapid succession for too long a period of time, that it causes the case temp to keep on rising gradually until typically, you've got yourself what's known as a scaldingly hot laptop. So this is why setting BD PROCHOT to disabled on your average slim laptop that was never designed to 'play Crysis' is near the top of the list of bestest fastest ways to kill a laptop.

    Bottom line? Undervolt if you can. (On Icy Lake you can't, and on my Tiger Lake also I can't...) Next, futz around with the Speed Shift EPP number─that looks like it can't be edited on the main screen of ThrottleStop despite the fact that it can be. Also keep in mind that Power Profiles will be disabled after you enable Speed Shift, and that Speed Shift can only be disabled again by powering down the CPU which allows the CPU to reset itself automatically, but if your BIOS enables it again after that (which some do, but others do not...), then disabling it will only be possible if the BIOS has a setting for it that can be changed─or if you can hack your BIOS if it doesn't have that setting.

    Either way, on (semi-)modern laptops, undervolting if it can be undervolted, and enabling Speed Shift─not to be confused with SpeedStep─thus being able to change the EPP is what opens the road to avoid cooking lasagna. That plus a slew of other, optional performance tweaks─naturally, and of course.

    How to properly limit cpu usage in power options ?-ts.png
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