The more powerful a system is, the more heat is generated. In order to avoid overheating and thus serious damage to the laptop, special cooling units, also known as coolers, are used. These are specifically designed for cooling microprocessors.
The cooling unit consists of a heat sink and a fan. The fan, consisting of a fan and a case, generates an air flow that is pushed through the heat sink and removes the waste heat from the notebook.
The material of the heat sink usually consists of aluminum, which is particularly light and inexpensive. The other variant is with copper, which is more expensive because more material is used. A combination of both are the so-called hybrid coolers.

Over time, the cooler wears out. Especially the ball bearing of the fan is susceptible to wear and tear or can get stuck. A broken radiator can be recognized by a loud rattling or you can't hear anything that indicates a jammed fan. If the cooling fails completely, the laptop turns itself off after a while to prevent overheating. If the cooler is defective, don't hesitate and replace it as soon as possible, as the mainboard and the entire notebook can suffer enormous damage due to overheating.