• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

Powerlimiting under small load and with low temps

Joined
Aug 24, 2023
Messages
3 (0.00/day)
So I'm the discouraged owner of a Lenovo T14s Gen 2 and a lenovo thinkpad Ultra Docking Station.

Sometimes (I cannot seem to figure out a pattern) the laptop will throttle down to 500 MHz when plugged into the dock, for no reason I can tell.
The problem is alleviated by unplugging the PC and using it without the dock. I could simply stop using the dock, but as I have paid good money for it,
not using the dock would result in me having to go to lenovos headquarters and shitting in their mailbox. I am not located in the US so having to travel there simply
to shit in their mailbox would be an expense I could live without.

I have installed throttle stop and have tried disabling BD PROCHOT, as I understand this is what allows the chipset to send signals to the CPU telling it to throttle,
even if there is no "thermal" need for it. This has however not alleviated the problem.

When throttling I apparently hit every single power limit (CORE, GPU, RING) do you guys have any idea why? What can I do to fix it?

1692859465144.png
 
Last edited:

unclewebb

ThrottleStop & RealTemp Author
Joined
Jun 1, 2008
Messages
8,351 (1.35/day)
The 11th Gen G7 series are very limited in what can be adjusted. Intel has removed or locked out most items in the FIVR window.

When PL1 throttling is in progress at less than 5W, show me the TPL and FIVR windows so I can see your settings and make some suggestions.
 

unclewebb

ThrottleStop & RealTemp Author
Joined
Jun 1, 2008
Messages
8,351 (1.35/day)
The TPL window shows that your computer has set the MMIO PL1 power limit to 5 Watts. That is why your CPU is power limit throttling at only 5 Watts.

Try checking the MMIO Lock box to fix this problem. This simple fix has made a world of difference to many 11th Gen G7 processors.

1692887777019.png


Leave the BD PROCHOT box on the main ThrottleStop screen clear. Your laptop uses multiple throttling methods so multiple fixes are necessary. Post a screenshot of the Options window.
 
Joined
Aug 24, 2023
Messages
3 (0.00/day)
Thank you uncle web, locking the Turbo Power Limit fixed the problem instantly!
Here is a screen grap of the options window:
1693206326879.png
 

unclewebb

ThrottleStop & RealTemp Author
Joined
Jun 1, 2008
Messages
8,351 (1.35/day)
fixed the problem instantly!
I always like hearing success stories.

The right side of the Options window shows that PROCHOT Offset is set to 10. This setting tells the CPU to start thermal throttling at 90°C. The Intel default value for PROCHOT Offset is 0. This tells the CPU to start thermal throttling at 100°C.

If you lower the PROCHOT Offset value, your CPU will thermal throttle less when it gets hot which can increase performance slightly. Lowering PROCHOT Offset will allow your CPU to run hotter which you may not like. Intel says setting PROCHOT Offset to 0 is OK and Lenovo has set this to 10. For a compromise you could set PROCHOT Offset to 5 so thermal throttling would start at 95°C. If it was my laptop, I would probably set PROCHOT Offset to 2 or 3.

Whatever value you choose, I recommend checking the Lock PROCHOT Offset box. This prevents the PROCHOT Offset value from changing while you are using your laptop. Some Lenovo laptops change PROCHOT Offset to as low as 35 while you are using your computer. This will create a nice cool running laptop that will only get up to 65°C but this can cause constant premature thermal throttling. No one wants their laptop stuck at only 400 MHz when it is not hot at all. Checking Lock PROCHOT Offset prevents this from happening. Varying PROCHOT Offset to magically create a cool and quiet computer was not one of Lenovo's better ideas.
 
Top