I do not have this laptop but keep in mind that your system has one of the strongest mobile CPU (8 core / 16 threads) with TDP 45W so please do not expect miracles. It requires cooling. I have old  MBP 15" with T8400 45W TDP CPU and it generated significant heat when fans were turn on permanently about 2000 rpm.

Good day. Thank you for your comment. I am aware that I have a powerful processor. However, it should not be fully occupied during office work or when idle. It can be seen in the manager that it goes to 1-2% of power, but it still works between 4.5-4.9 MHz. I was looking at the BIOS and I have set variable usage. I think if it worked in the range from the base 2.4GHz and increased the power as needed, then it would not overheat and thus the fans would not go all the time. I just don't know what it is that he's still running at almost full power. Can you advise?

Please update the BIOS to the latest version available. After that you may run the ePSA test on the fan and confirm the functionality. You may follow the below mentioned steps.  

• As soon as you see the DELL logo, tap until you see the one-time boot menu.

• Select Diagnostics.

• The ePSA starts running the quick test without waiting for user input.

• To select a specific device to test, users can tap the Esc key.

• Select Fan and run the test. This will test the fan for three functions  (On/Off, Low speed, High speed)

• If the fan doesn’t respond according to the three functions, this is most likely to be issues with the fan or the fan controller.  

I hope this helps. Please do write back in case you have any other questions.