Question Laptop's CPU thermal throttles to 0.4 ghz only when fan is at maximum speed

[FulcruuM]

basically the title, laptop run at high 70c to 80c when gaming, when on performance or normal mode everything's fine, then every time I switch to custom mode (maximum fan) it the laptop's CPU thermal throttles to 0.4ghz which is weird because it does not do that on other modes, and it used to work normal months ago. CPU is i5-12450HX

 

[Lutfij]

Welcome to the forums, newcomer!

Please pass on the make, model and SKU for your laptop. Might be a good idea to see if your laptop is pending any BIOS updates. What OS are you working with?

 

[uWebb429]

CPU thermal throttles to 0.4ghz

Try running ThrottleStop 9.7.2

https://www.techpowerup.com/download/techpowerup-throttlestop/

Press the Limits button and watch the Limit Reasons data.

A CPU getting stuck at 0.4 GHz sounds more like a BD PROCHOT throttling problem. This is not the same as a thermal throttling problem. Intel CPUs do not thermal throttle at only 70°C to 80°C and they do not get stuck at 0.4 GHz when thermal throttling unless the heatsink has fallen off.

What box is lighting up red under the CORE column of Limit Reasons? You have to know what the problem is before you can solve it.

The sad news is that most 12th Gen and newer laptops have decided to lock out BD PROCHOT adjustment. If this is the problem, it will be next to impossible to fix this.

 

[FulcruuM]

Welcome to the forums, newcomer!

Please pass on the make, model and SKU for your laptop. Might be a good idea to see if your laptop is pending any BIOS updates. What OS are you working with?

its the Lenovo I5IAX9I the intel gpu version, also no bios updates available, it's windows one

 

[FulcruuM]

Try running ThrottleStop 9.7.2

https://www.techpowerup.com/download/techpowerup-throttlestop/

Press the Limits button and watch the Limit Reasons data.

A CPU getting stuck at 0.4 GHz sounds more like a BD PROCHOT throttling problem. This is not the same as a thermal throttling problem. Intel CPUs do not thermal throttle at only 70°C to 80°C and they do not get stuck at 0.4 GHz when thermal throttling unless the heatsink has fallen off.

What box is lighting up red under the CORE column of Limit Reasons? You have to know what the problem is before you can solve it.

The sad news is that most 12th Gen and newer laptops have decided to lock out BD PROCHOT adjustment. If this is the problem, it will be next to impossible to fix this.

actually i'm using throttlestop to undervolt the cpu to 45w, but i'll try what you said, thanks!