CPU cooler - air cooling

In an air cooler, heat is transferred from the IHS of the CPU to a conductive substrate typically made of copper or aluminum through the applied thermal paste. Then, the thermal energy enters the connected heat pipe from the substrate.
A heat pipe is designed to transfer heat from one location to another. In this case, heat will be transferred to the heat sink higher than the motherboard, leaving space for other components such as RAM. These pipes transport energy in the form of heat to the thin metal fins that make up the radiator. These heat sinks are designed to maximize exposure to cooler air and absorb heat from the metal. Then, the connected fan blows the hot air away from the radiator.