Thank you for the answer.
I am talking about degrees Centigrade. A Bios alert put me on the spot.
The watercooling pump and fan (corsair h55) are working.
In principle I have not deactivated any safety device. The bios settings are the factory ones. No overclocking.
I think that there is a lack of liquid in the watercooling. This one has been working for at least 4 years.
I find that the idle operation of the PC is a bit high, (50°-60°) whereas on the internet they speak rather of 40°.
Sincerely
