cpu power limit on my G8

[helijia]

why the lastest hp bios limit the cpu power？

BIOS version : T92 Ver. 01.10.00 - 07/18/2022

throttlestop show that the cpu only work on about 2.2G and max power is about 25W

Power Supply : AC Adapter ,Not tpye c input

OS: WINDOWS 10 defaut

Problem Time : After update the biso from old version (about 1.08) to the lastest bios version. I got this power limit

[TzortzisG]

Hi helijia.

Throttlestop offers not only monitoring options, but also the way to manually edit these limits. You should really visit the relative forums  Kevin Glynn's Thottlestop forums and ask UncleWebb (Kevin Glynn) to help you. He's actually willing and happy to offer great assistance to anyone that posts a question.

However, right off the bat I can tell you since you're running windows 10 you should be able to easily change the power limits from within the 9.5 TPL options:

• Change PL1 PL2 to an appropriate large number -45W is good.

• Check the MMIO Lock box.

•  If FIVR is unlocked onyour Tiger Lake H cpu, set IccMax for both the core and the cache to the maximum, 255.75.

By following these steps, and unless HP has enabled/implemented (with its latest BIOS update) the use of an embedded controller (EC) to lower the power limits, you should have a CPU running at 45Watt sustained until it hits the Tjunction limit.

On a sidenote, an 11th gen cpu has no business having SpeedStep enabled and you should really enable Ultimate Performance windows profile (this is a workstation after all).

Take care.

[helijia]

dear hp support team. i have dont some research on this issue, 

finnally it turns out the lastest intel driver and the windows 10 works together to  turn this cpu into throttling

Same bios version

On linux Ubuntu 22.04 LTS and run sysbench，use the cpux app shows that the cpu frequency will turn to 4.2G all-core，

but on Win10,  this cpu will be throttled to about  max 31W

the intel dirver which cause this issue maybe the  Intel SoftwareComponent 1.63.1155.1

When we install a  previous windows version  and disable the windows update automatilly，we will get the cpu max to power 100Watts again. 

[TzortzisG]

Hello helijia.

You should notify the HP Support Team, but here: Contact Official HP Support 

This forum is actually just a community of HP (product) users sharing information and advice. HP Support Team doesn't monitor these posts.

It makes sense that the reason for the very low power limit ISN'T actually a BIOS update. I've seen ridiculously low BIOS limits in other manufacturer's laptops, but never on HP laptops and it wouldn't be logical to set a limit like this on a powerful Zbook mobile workstation....

About the offending driver, it's probably the Intel Dynamic Tuning Driver (formerly known as DPTF Intel(R) Dynamic Platform and Thermal Framework a platform level hardware/software solution for power and thermal management). It's basically a piece of throttling software -but in the form of a driver. In my Probook (not Zbook) G8 there is an option in the BIOS to disable it on a bios level and then you can uninstall the driver -and get rid of it for good. This is one of the first things I disabled in my BIOS when I got the G8. I always set my own power limits with Throttlestop anyways, so it wasn't doing me any good.  I don't know if YOUR BIOS version has this option. You can read about the Dynamic Tuning driver here: Intel® Dynamic Tuning Technology (Intel® DTT) User Guide  and here: Risks Related to Disabling Intel® Dynamic Tuning Technology (Intel® DTT) This in fact is the purpose of this driver, limiting CPU and GPU. This driver along with any BIOS power limits are the two ways that laptop manufacturers use to compensate for superthin laptops and inadequate cooling systems.

* The driver you mentioned that got updated ( Intel SoftwareComponent 1.63.1155.1) -if you take a look at microsoft update catalog- is actually the Intel(R) ICLS Client update which addresses security updates and improves system stability. Although it HAS been known to cause all sorts of issues, I don't see how it could possibly force power limits on your CPU, the ones that cause the PL1 and PL2 boxes in throttlestop...