Solved CPU heat sink detachment

[Avtandil]

Do you see anywhere in the BIOS " BIOS Setup Utility Power menu " see attachment below;

In the BIOS there is only fan monitoring. The CPU one has no data available. No other settings are available.
From the HP website I was finally able to update the BIOS and the Chipset drivers. Now the most recent (2023) ones are installed. Before, proceeding from "Device Manager" in Windows, it told me that the ones installed were the most recent, instead they were from 2019.
After the update the situation is unchanged, so it seems that the ordinary setting is with the fan off and that the Intel Pentium J5005 CPU type, with a very low TDP of 10W, is designed to dissipate little heat and can also work with passive cooling systems (heat sink only).
This site describes the configuration without a fan, link:

Power and thermal performance of fanless Pentium J5005 PC

How much power a 10W TDP CPU can draw?

rkblog.dev

Now I mounted the new fan on the CPU heat sink, keeping it detached from the fan header on the motherboard and connecting it to an external power supply that turns on when the devices are connected to the mains. This way it is always running without the need for temperature-based control.
I kept the old fan connected to the motherboard fan header to prevent the PC from being stopped during POST due to failure to detect the device.

 

[phillpower2]

it seems that the ordinary setting is with the fan off and that the Intel Pentium J5005 CPU type,

We were a bit slow on the uptake here in that we should have asked for the CPU details as opposed to trying to fix something that is not broken.

The reason why the fan does not spin up is because what you have is basically a notebook processor and they as you know do not have a standard desktop HS & cooling fan, this both the reason why the fan does not spin up and there is no cooling fan information/adjustment options in the BIOS.

What you have done is not required but in all fairness you can never have too much cooling, as long as it is quiet that is.

Fwiw, a different option would have been to use a 4 pin fan extension cable that you connect the stock 3 pin into and then the 4 pin connector on the other end you would plug into the 4 pin header on the MB.

 

[Avtandil]

What you have done is not required but in all fairness you can never have too much cooling, as long as it is quiet that is.

The fan has a nominal voltage of 12V but can also operate at 4.5, and at low RPM it's very quiet.

 

[phillpower2]

Was actually referring to computers in general, you get people with more cooling fans than what is required asking why their computer is so noisy.

Unless there is anything else related to this you seem to have the matter in hand so if we don`t hear back from you we will mark and close your thread.

 

[Avtandil]

Unless there is anything else related to this you seem to have the matter in hand so if we don`t hear back from you we will mark and close your thread.

I agree, thanks for the support.

 

[phillpower2]

You are welcome and thank you for the follow up