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Legion 7 16irx9 i7-14700HX Logical processors temp spikes, high power draw while idle, high idle temp

Aperturee

New Member
Joined
Mar 2, 2025
Messages
2 (2.00/day)
Hello,

In need of assistance.
I've undervolted CPU, OC/UV GPU, Using W11 Balanced plan and a cooling pad. Also using custom mode in Lenovo Vantage for fans to spin from 70 to about 3600RPM.

While idling, doing simple tasks (browsing, watching YouTube), I noticed strange 2 logical processors temps and power spikes.
Also I have quite high temps overall while idle, about 60C however CPU utilization is up to 10%.
Can't pinpoint the issue.
Attaching TS settings, maybe someone could help. Reason I'm asking that I like this laptop very much and want to keep it as long as possible, lower temps and heat helps a lot with that.

Thank you!

Screenshot 2025-03-02 095245.png
Core.png
P.png
E.png
TPL.png
 

unclewebb

ThrottleStop & RealTemp Author
Joined
Jun 1, 2008
Messages
8,177 (1.34/day)
Can't pinpoint the issue.
The only issue is that Intel HX processors like to run hot. Intel says that any temperature under 100°C is a safe operating temperature. The manufacturer of your laptop has set the PROCHOT (processor hot) temperature conservatively to 95°C. This will cause premature thermal throttling. That is OK. This can reduce maximum performance slightly while keeping your CPU extra safe. A lower PROCHOT temperature will prevent the CPU cores from ever reaching the full 100°C Intel spec.

I noticed strange 2 logical processors temps and power spikes.
Intel CPUs have 2 preferred P cores. When a CPU is lightly loaded, it is normal for tasks to be scheduled first on the 2 preferred cores. These 2 cores have the ability to run a little faster compared to the other 6 P cores. It is completely normal if a couple of cores run a little hotter and are working a little harder compared to other cores. There are also times when some tasks might get deliberately selected to run on one of the lower power Efficiency cores. When playing a game, tasks associated with that game should end up on one of the Performance cores.

You do not have to worry about any of this. The CPU is quite capable of looking after itself. If you want to know what two cores are the preferred cores, run CPU-Z, select Tools, Clocks and it will show you. The last two cores on my 10850K are the preferred cores. My preference is to use ThrottleStop so all 10 cores run at 5000.00 MHz whether idle or fully loaded.

1740938222326.png


One thing I noticed is that your turbo power limits are set very, very conservatively. I understand that lowering the power limits can help reduce temperatures. Some users prefer cool and quiet compared to fast and hot.


The 55 Watt processor base power rating does not allow for any turbo boost. That is how much power is required to run the CPU at its base frequency which is only 2.10 GHz. The Maximum Turbo Power is rated at 157 Watts. Setting PL1 to 55W and PL2 to 75W will cripple the maximum performance of your computer.

For comparison, I have a similar 14900HX. To get all cores to run at their full Intel rated speed during a Cinebench test, both turbo power limits have to be set to at least 230W. Obviously that is completely overkill for day to day use but it does show just how power hungry these CPUs are. Seeing how your power limits are set is like watching granny drive her new Corvette in the slow lane about 20 mph under the speed limit. You paid for a high performance laptop. Do not be afraid to use it.

Download ThrottleStop 9.7.2 from my signature. It has a couple of minor bug fixes. You can copy the new ThrottleStop.exe into your ThrottleStop folder. No need to reset any of your settings.
 

Aperturee

New Member
Joined
Mar 2, 2025
Messages
2 (2.00/day)
The only issue is that Intel HX processors like to run hot. Intel says that any temperature under 100°C is a safe operating temperature. The manufacturer of your laptop has set the PROCHOT (processor hot) temperature conservatively to 95°C. This will cause premature thermal throttling. That is OK. This can reduce maximum performance slightly while keeping your CPU extra safe. A lower PROCHOT temperature will prevent the CPU cores from ever reaching the full 100°C Intel spec.


Intel CPUs have 2 preferred P cores. When a CPU is lightly loaded, it is normal for tasks to be scheduled first on the 2 preferred cores. These 2 cores have the ability to run a little faster compared to the other 6 P cores. It is completely normal if a couple of cores run a little hotter and are working a little harder compared to other cores. There are also times when some tasks might get deliberately selected to run on one of the lower power Efficiency cores. When playing a game, tasks associated with that game should end up on one of the Performance cores.

You do not have to worry about any of this. The CPU is quite capable of looking after itself. If you want to know what two cores are the preferred cores, run CPU-Z, select Tools, Clocks and it will show you. The last two cores on my 10850K are the preferred cores. My preference is to use ThrottleStop so all 10 cores run at 5000.00 MHz whether idle or fully loaded.

View attachment 387513

One thing I noticed is that your turbo power limits are set very, very conservatively. I understand that lowering the power limits can help reduce temperatures. Some users prefer cool and quiet compared to fast and hot.


The 55 Watt processor base power rating does not allow for any turbo boost. That is how much power is required to run the CPU at its base frequency which is only 2.10 GHz. The Maximum Turbo Power is rated at 157 Watts. Setting PL1 to 55W and PL2 to 75W will cripple the maximum performance of your computer.

For comparison, I have a similar 14900HX. To get all cores to run at their full Intel rated speed during a Cinebench test, both turbo power limits have to be set to at least 230W. Obviously that is completely overkill for day to day use but it does show just how power hungry these CPUs are. Seeing how your power limits are set is like watching granny drive her new Corvette in the slow lane about 20 mph under the speed limit. You paid for a high performance laptop. Do not be afraid to use it.

Download ThrottleStop 9.7.2 from my signature. It has a couple of minor bug fixes. You can copy the new ThrottleStop.exe into your ThrottleStop folder. No need to reset any of your settings.

Hello unclewebb! Very thankful for your input. Sets my mind at peace knowing that almost everything is pretty much expected from this CPU. Very thorough explanation! :)

I understand that PL1 and PL2 is set very aggressively, I mainly did this to reduce heat and expand longevity.
But under full load, demanding games run at max 93 C, with very acceptable FPS, so I'm pretty happy with the result, but there's always room for improvement.
I know it's mostly trial and error, will try to adjust PL2, as default limits are:


PL1 (TDP): 45-55W (configurable).
PL2 (Max. Boost TDP): 157W.
 
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