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Disabling undervolt protection on Intel Core Ultra 7

Zolik

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Apr 1, 2024
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Is it possible to do so? I'm on Samsung Galaxy Book 4 and the BIOS is pretty locked down. Is there any methods to edit the variables to disable it?
 

unclewebb

ThrottleStop & RealTemp Author
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Jun 1, 2008
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Post a screenshot of the FIVR window. I have not tested ThrottleStop on any Ultra series processors so it will be interesting to see this information. I do not yet know what is possible.
 

Zolik

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Apr 1, 2024
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Post a screenshot of the FIVR window. I have not tested ThrottleStop on any Ultra series processors so it will be interesting to see this information. I do not yet know what is possible.
1711983837961.png

all options are greyed out.
 

unclewebb

ThrottleStop & RealTemp Author
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It looks like you still have virtualization enabled. Have you disabled Windows core isolation memory integrity? Do you have any Windows Features enabled that depend on virtualization being enabled? Post a screenshot of the Windows Features list if you are not sure. Things like Virtual Machine Platform, Windows Sandbox, Windows Subsystem for Linux, etc. have to be disabled before the FIVR window will work. Follow the link in my signature to learn more about VBS.

After VBS is completely disabled, reboot and delete the ThrottleStop.INI configuration file before running ThrottleStop. Post an updated FIVR screenshot after you do that. A few more screenshots of the main window and the TPL window will help me confirm what items are working or not working on these new CPUs.

At the moment ThrottleStop is reporting Not Available in the FIVR window. I am guessing that even with VBS disabled, you still will not be able to undervolt your CPU. Intel has removed this useful feature from the majority of their mobile CPUs. Only 12th, 13th and 14th Gen HX or HK mobile processors allow undervolting. I am not sure if Intel has released any Core Ultra processors yet that are unlocked.
 

Zolik

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1712030687331.png

VBS is indeed running. But I have problem with disabling it. I have followed the provided guide but none of that worked. I am on Windows 11 Home if that helps. Some online guides suggested that it can be turned off in BIOS, but I couldn't find any options. I have included screenshots from BIOS, as well as Windows Security.
1712030981719.png

IMG_0725 - Copy.jpg
1712031200339.jpeg
 

unclewebb

ThrottleStop & RealTemp Author
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Post an updated FIVR screenshot. Did anything in the FIVR window change compared to your previous screenshot?

The All Core section should show the default turbo ratios in the buttons. When I see -3, -2, -1, 0; that means ThrottleStop is being blocked from reading registers within your CPU due to VBS still being enabled..

1712031751476.png
 

Zolik

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Apr 1, 2024
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Post an updated FIVR screenshot. Did anything in the FIVR window change compared to your previous screenshot?

The All Core section should show the default turbo ratios in the buttons. When I see -3, -2, -1, 0; that means ThrottleStop is being blocked from reading registers within your CPU due to VBS still being enabled..

View attachment 341678
Nothing has changed. Seems that ThrottleStop is still being blocked.
1712033667073.png
 

unclewebb

ThrottleStop & RealTemp Author
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Run msinfo. Does it show that Virtualization based security is still enabled? Some other users have also had the same problem. Most found a setting in the BIOS to disable virtualization. Different BIOS versions have different names for this. I think one BIOS called it VT-x. Perhaps you might find a similar setting hiding somewhere in your BIOS. It is also possible that Samsung does not provide any way to completely, 100%, disable virtualization.

Even if you find a way to disable virtualization, I think you are still going to find that your Core Ultra 7 processor does not allow CPU voltage control. That is what it means when the ThrottleStop FIVR window reports Not Available.

1712072496820.png
 

vgm

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Actually found it hard to access the registers on a MS Secured Core since it locks all access as part of security. The intel CPUs run very hot, a -50mV might bring temps down esp. while running on battery. Zenbook S13 with 1335u idles at 60C and maxes out at 95C in balanced mode. Quiet mode is very slow and High Performance push the temps near 100C.
 

Zolik

New Member
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Apr 1, 2024
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Run msinfo. Does it show that Virtualization based security is still enabled? Some other users have also had the same problem. Most found a setting in the BIOS to disable virtualization. Different BIOS versions have different names for this. I think one BIOS called it VT-x. Perhaps you might find a similar setting hiding somewhere in your BIOS. It is also possible that Samsung does not provide any way to completely, 100%, disable virtualization.

Even if you find a way to disable virtualization, I think you are still going to find that your Core Ultra 7 processor does not allow CPU voltage control. That is what it means when the ThrottleStop FIVR window reports Not Available.

View attachment 341716
VBS is still running. Couldn't find options to disable it in BIOS. Throttlestop's feature to auto-switch power plans according to DC/AC and the option to disable turbo is already good enough for me at this moment. Thank you for your assitsance.
 
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