Water cooling system generally consists of the following parts: heat exchanger, circulating system, water tank, water pump and water, according to the need can also increase the heat dissipation structure. Because of its physical properties, water has no better thermal conductivity than metal (fan refrigeration through metal thermal conductivity), but the flow of water will have excellent thermal conductivity, that is to say, the heat dissipation performance of water-cooled radiator is proportional to the flow rate of heat sink (water or other liquids), and the flow rate of refrigerant is related to the pump power of refrigeration system. Moreover, the heat capacity of water is large, which makes the water-cooled refrigeration system have a good thermal conductivity. Good thermal load capacity. Five times as much as the air-cooled system. The direct benefit is that the CPU working temperature curve is very smooth. For example, when a system using air-cooled radiator runs a program with a large CPU load, there will be a temperature peak in a short time, or it may exceed the CPU warning temperature, while a water-cooled radiator system has a relatively small thermal fluctuation due to its large thermal capacity.