PHN18-72 Maximum Processor State in Power Plan not changing CPU frequency

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Rebalosho
Rebalosho Member Posts: 7

Tinkerer

Hello, I have a PHN18-72 5070ti + ultra 9 275hx.

I want to edit my CPU frequencies to not use Turbo Boost.
The usual way to do that is to set maximum processor state to 99%.
It seems like it is not applying not matter how low I set it to, even at 10%.

The only way to disable turbo boost was through advanced bios.

My question here is, is there a certain lock on a software level? I don't want to play around a lot but at the same time the temps are too high for my liking.

Thank you in advance!

Answers

  • Rebalosho
    Rebalosho Member Posts: 7

    Tinkerer

    edited July 26

    Hello again Puraw!

    The fix you provided immediately worked, thank you very much.
    Although lowered now, the temps are still high on my laptop while gaming.
    Are there ways to avoid that?

    Also
    Is it recommended to play games on Quiet mode on Predatorsense so we can have lower temps? Regardless of fps loss anyway.

    Also
    Is there a way to safely lower cpu tdp in a way where it lowers temps.
    Or a way to limit CPU frequency (although didn't work using edit power plan).

    My main concern really is high temps and loud fan noise.
    What is considered normal temp when gaming, what is high, and what is dangerously high?

    Thank you so much in advance!

  • Puraw
    Puraw ACE, Member Posts: 18,130 Trailblazer

    Hi Rebalosho

    🔧 “Is it recommended to play games on Quiet mode in PredatorSense?” Yes—but with nuance. Quiet mode caps CPU/GPU performance to reduce heat and noise, which works well for less demanding titles or when users prefer silence over speed. Since PHN18-72 units run hot by default, Quiet mode can help maintain sanity indoors. That said, some users report inconsistent fan behavior in Quiet mode, so a hybrid approach (Quiet with boost mode disabled) may offer smoother thermal results.

    🌡️ “What temps are normal/high/dangerously high while gaming?” Here’s a general scale for Ultra 9 + 5070Ti setups:

    Condition

    CPU Temp Range

    Notes

    Idle/Low Load

    45–65°C

    Quiet and cool

    Gaming Normal

    75–85°C

    Acceptable with balanced cooling

    High Load (AAA titles)

    85–95°C

    Warm but expected in thin chassis

    Danger Zone

    95–100°C+

    Risks thermal throttle or EC panic

    If you see consistently 95°C+, even after disabling boost and shifting to Quiet mode, undervolting (via BIOS or software) or power limits might be next-level solutions.

    ⚙️ “Is there a safe way to lower CPU TDP or limit frequency?” Not easy without BIOS access. The PHN18-72's advanced BIOS might offer PL1/PL2 adjustment or manual voltage/frequency tuning. But for users unwilling to dive deep, combining:

    • Boost mode disabled
    • Maximum Processor State capped at 99%
    • Quiet mode enabled

    …can simulate reduced TDP without flashing or unlocking anything. Just make sure the registry tweak to reveal boost settings is active so those controls actually show.

  • Puraw
    Puraw ACE, Member Posts: 18,130 Trailblazer

    You are welcome, if this concluded your original question please mark my answer as "Yes, Answered" 😉

  • Rebalosho
    Rebalosho Member Posts: 7

    Tinkerer

    edited 11:58AM

    Hello Puraw!

    I am able to accept playing on Quiet mode + Boost off even at the cost of performance because my main concern is temps and fan noise.
    My concern is though: Could the laptop overheat in a way where Quiet mode's fan speeds are not enough to cool it down and therefore damaging the components? Or is that not possible based on how it is originally programmed?

    My temps are as follows with boost turned off (God of War Ragnarok): plus or minus
    Quiet: 70C-75C (minimal fan noise)
    Balanced: 70C-80C (minimal to loud fan noise)
    Performance: 70C-80C (loud fan noise)
    Turbo: 65C-75C (very loud fan noise)

    I also tried editing TDP in bios (using the help of Chatgpt) but unfortunately none of the settings I set are being applied even though they are saved in BIOS.

    Also: Maximum Processor State for me does not apply no matter how low I set it.

    However, I was able to turn off boost using your method.

    Any further help would be greatly appreciated!

    Thank you in advance.