Some common knowledge about radiators—explained by a finned-tube manufacturer.

　　 Coil tube Manufacturers explain that a heatsink operates by transferring heat generated by the CPU to the heat pipes. Inside the heat pipes, the working fluid absorbs heat and turns into a vapor. This gaseous substance rises along the capillary tubes to the fins, where it is cooled by the fan. The working fluid then condenses back into a liquid and flows downward to the base of the pipe, where it once again absorbs heat. Consequently, two primary factors contribute to the formation of a vacuum within the pipe: in a vacuum, the boiling point of the liquid is lower, allowing the heat‑pipe working fluid to absorb a substantial amount of heat as it transitions from liquid to gas.

　　Radiator manufacturers contend that a radiator’s efficiency depends on both the number and diameter of its heat pipes: the more heat pipes there are, and the larger their diameters, the greater the amount of working fluid they can contain, and thus the more heat they can absorb. However, the thermal performance of a heat-pipe radiator is also closely tied to its fins. The heat pipes transfer heat to the fins; if the fins fail to dissipate that heat into the surrounding air promptly, the overall temperature of the radiator will rise.

　　 Coil tube Manufacturers emphasize that the design of a heatsink’s fins and fan involves many critical considerations. The greater the contact area between the fins and the air, the higher the thermal conductivity. So, does that mean denser fins are always better? Not necessarily—excessively dense fins can increase aerodynamic resistance, and if the fan doesn’t generate sufficient airflow pressure, heat will build up, which also undermines cooling performance. Only by carefully balancing the fan’s static pressure and the airflow resistance between the fins can one design a heatsink with excellent thermal performance.

　　According to manufacturers of wrapped‑plate heat exchangers, an all‑in‑one liquid cooler can be regarded as a compact version of a split‑type liquid cooler. It typically consists of a water block, a pump, a cooling exhaust, tubing, coolant, and a fan. Due to its physical properties, water’s thermal conductivity is not as high as that of metals; however, flowing water exhibits excellent heat‑transfer performance. In other words, the cooling efficiency of a liquid cooler is directly proportional to the coolant flow rate and depends on the pump power of the cooling system.

　　An all-in-one liquid cooler transfers CPU heat to the coolant via the water block, which is circulated by a pump through the radiator and then cooled by fans before returning to the system. Moreover, water’s high heat capacity gives liquid cooling excellent thermal‑load handling, resulting in a remarkably stable CPU temperature profile.

　　 Coil tube Manufacturers believe that the thermal efficiency of an all-in-one liquid cooler hinges primarily on three factors: first, the design of the water block. Since the water block makes direct contact with the CPU, rapid heat conduction is critical. Typically, the water block is made of copper and interfaces directly with the CPU; its surface facing the coolant features microchannels that both increase the contact area and boost flow rate, enabling the coolant to carry away more heat. Moreover, variations in the channel design can yield markedly different cooling performance.