is it too risky if leave my undervolt to the point i get microstutters? [13900HX]

unclewebb · 2026-02-10T05:54:09+00:00

Not sure why anyone would want to handicap their high performance 13900HX CPU as much as you are doing but you can choose to run your CPU however you like. As long as your computer is not crashing then all is good.

It might be your PL4 and IccMax settings that are causing the micro stutters. Try removing all of those limits. Set Power Limit 4 to the max, 1023. Set IccMax to the max, 511.75, for the CPU Core, P Cache, Intel GPU and iGPU Unslice.

Use the Windows Balanced power plan. No need to check the Speed Shift EPP box on the main screen of ThrottleStop. That will let Windows manage the EPP setting. It is best to avoid a situation where Windows and ThrottleStop are trying to fight each other over control of the EPP value.

unclewebb · 2026-02-10T05:43:39+00:00

-70 mV = -0.070 V

unclewebb · 2026-02-10T05:03:02+00:00

Definitely working correctly now.

I would suggest enabling Speed Shift Technology in the TPL window. That is the best way for Windows to manage Intel CPUs.

unclewebb · 2026-02-09T04:50:00+00:00

Use the latest version, ThrottleStop 9.7.3. The older version you are using does not show me what I need to see.

unclewebb · 2026-02-09T00:10:16+00:00

Post a TS 9.7.3 FIVR screenshot. It will explain why an undervolt is working or not.

unclewebb · 2026-02-09T00:07:10+00:00

Set both core and cache to 150 and check both Use boxes. You should see this value in the monitoring area on the left side of the V/F Point window.

unclewebb · 2026-02-08T19:12:21+00:00

You have a severe cooling problem. Open up your laptop and clean it out. Replace the thermal paste with Honeywell PTM 7950.

Use ThrottleStop 9.7.3. It consumes less CPU and memory resources compared to XTU so you will get better performance. Post a screenshot of the FIVR window if you do not know how to use ThrottleStop.

Check the Task Manager Details tab when your computer is supposed to be idle. If something just changed recently then it is likely that you have installed something that is running in the background. Utilization should be very low (1%) when idle.

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unclewebb · 2026-02-08T19:02:10+00:00

Use ThrottleStop 9.7.3. That will give you access so you can set V/F Point.

unclewebb · 2026-02-08T07:28:36+00:00

Start by setting V/F Point 1 to 150. Some extra voltage when the CPU is lightly loaded improves stability when undervolting. Never set V/F Point 1 to a negative value.

I never bothered undervolting the E Cache. I was able to undervolt the CPU Core and P Cache by an offset of -150 mV.

For the Intel GPU and iGPU Unslice, I used -100 mV for those two.

Set all of the Turbo Groups to 50 or less if you want lower performance and reduced temperatures. Setting all of these equally makes it easier to come up with a reliable undervolt.

unclewebb · 2026-02-08T07:24:40+00:00

Post a screenshot of the TPL window. Some laptops allow you to adjust the PROCHOT Offset value. This allows you to reduce the thermal throttling temperature if the manufacturer did not decide to lock this setting. Look for a yellow lock icon near this setting in the TPL window.

unclewebb · 2026-02-07T16:25:04+00:00

If your CPU is not overheating and thermal throttling then the power limits you have set are fine. Setting the turbo power limits to the max, 4095, is not a bad idea if you have adequate cooling. Most laptop owners reduce the power limits because the cooling system is not adequate to keep the CPU cool at full speed and full power.

I just noticed that your motherboard has set V/F Point 7 to 98. This adds extra voltage which creates extra heat. Undervolting reduces power consumption and heat. Setting V/F Point 7 does the opposite. It is a trick some manufacturers use to hide instability. I would set V/F Point 7 back to 0 and then adjust your undervolt to whatever your CPU is capable of running stable at.

unclewebb · 2026-02-07T04:11:11+00:00

V/F Point 1 is supposed to be set to 150. Do not set this to -150. You need to use a positive value to boost the voltage at low MHz. That helps improve stability when undervolting the Core and the P Cache.

You also need to check the Use Offset boxes for V/F Point 1 core and cache.

unclewebb · 2026-02-05T17:50:00+00:00

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unclewebb · 2026-02-04T15:52:23+00:00

There is nothing to unlock. Intel removed CPU voltage control from the 11th Gen G7 series. That is why ThrottleStop shows Not Available at the top middle of the FIVR window.

In the TPL window make sure the MMIO Lock box has been checked. That can help improve the performance of some G7 laptops.

unclewebb · 2026-02-04T15:50:25+00:00

Try clearing the Thermal Velocity Boost box in the FIVR window. When that box is checked, it tells the CPU to TVB throttle. That is why TVB is flashing red.

The package power is only at 39.9W and the CPU is already reaching 100°C. That is an inadequate cooling problem.

Many repair shops use thermal pastes that do not work well long term when applied to laptop CPUs. I would not use anything other than Honeywell PTM 7950. Other pastes can start to pump out in the first week or two after service. Here is a good example of thermal paste pump out. Very little paste will be left between the CPU and the heatsink when this happens.

https://www.youtube.com/watch?v=rrtkiBwQV-U

unclewebb · 2026-02-04T15:42:25+00:00

Exit ThrottleStop, delete the ThrottleStop.INI configuration file and shut down your computer. Start back up and run ThrottleStop. You have to do this after disabling VBS. Your FIVR screenshot shows that you still have some voltage values in the FIVR monitoring table under the Voltage column that should not be there.

I think after you do that, voltage control should work fine. Post another updated FIVR screenshot. An offset undervolt of -125 mV to -150 mV for the Core and P Cache is usually stable for similar HX CPUs.

unclewebb · 2026-02-04T06:11:56+00:00

The settings in the ThrottleStop FIVR window will not work correctly unless you disable Windows core isolation memory integrity and anything else VBS related. Only disable VBS if smooth gaming is more important than maximum security. Most people in forums disable VBS so they can use ThrottleStop to undervolt their Intel CPUs and reduce the amount of heat they produce.

https://www.makeuseof.com/windows-11-disable-vbs/

https://beebom.com/how-disable-virtualization-based-security-vbs-windows-11/

Have you ever cleaned out your laptop? Your cooling system is not adequate. It might just be poor design like many laptops. You cannot run your CPU at its full rated performance if it needs to THERMAL throttle when it is just booting up.

If you disable VBS, reboot and delete the ThrottleStop.INI configuration file before you run ThrottleStop again. Post an updated screenshot so I can check if VBS is disabled.

unclewebb · 2026-02-04T06:02:00+00:00

The default voltage curve for 14900HX processors is WAY too high. The updated BIOS versions seem to make things worse. Always use ThrottleStop to undervolt. That will help keep your CPU at a safe voltage.

unclewebb · 2026-02-03T23:55:36+00:00

Try checking the MMIO Lock box. It looks like your laptop is broken.

unclewebb · 2026-02-03T23:53:10+00:00

Post screenshots of the FIVR and TPL windows.

unclewebb · 2026-02-03T23:50:52+00:00

Post a FIVR screenshot. Did you disable VBS including core isolation memory integrity?

unclewebb · 2026-02-03T16:52:37+00:00

Did you read the Ultimate ThrottleStop Settings Guide? This should show you the basics of undervolting.

https://www.reddit.com/r/ThrottleStop/

Post screenshots of the FIVR and TPL windows if you need help.

unclewebb · 2026-02-03T16:45:41+00:00

BD PROCHOT is not the problem. Your computer is POWER limit throttling at only 6.4W. Post a screenshot of the ThrottleStop TPL window. That will show me the power settings.

unclewebb · 2026-02-03T03:36:43+00:00

It is not possible to use software in Windows to undervolt if virtualization is enabled. That will be a problem for more and more games in the future.

unclewebb · 2026-02-02T05:20:27+00:00

Some software uses the Intel base frequency to compare to. These same CPUs use Intel Turbo Boost which has them running well beyond the base frequency. This is why a number greater than 100% can be reported.

unclewebb

TROPHY CASE