Basic knowledge of thermal heatsink
Description of Heatsink:
When the CPU is working, it will produce a lot of heat. If these heat are not dissipated in time, it may cause crash at least, or it may burn the CPU. The CPU heatsink is used to dissipate heat from the CPU. Heatsink plays a decisive role in the stable operation of CPU. It is very important to choose a good heat sink when assembling a computer.
Material classification：
1. Aluminum. As the metal with the highest content, its main characteristics are low cost and low heat capacity. Although it absorbs heat slowly, it releases heat quickly. The heat dissipation effect is directly proportional to its structure and workmanship. The more fins, the better the bottom polishing, and the better thecooling effect.
2. Copper. Compared with aluminum, copper has an inherent advantage: the thermal conductivity is 412w / MK, which is nearly twice as high as 226w / MK of aluminum, but copper also has an inherent disadvantage: the heat capacity is too high, this kind of heat sink absorbs heat quickly but releases heat slowly. It needs to cooperate with high-power and high-speed fans to achieve the ideal effect. Due to the good toughness of copper, the manufacturing process is much easier than that of aluminum. There are folding type, gear shaper type, etc. the density of heat sink can be higher than that of aluminum, and the cooling area is correspondingly larger, which can make up for the slow heat dissipation caused by its high heat capacity. However, the unit cost and manufacturing cost of pure copper are much higher than that of aluminum, which directly leads to the high price of this kind of heat sink, although the price is high, But the heat dissipation effect is much better than that of aluminum.
About liquid cooling:
Liquid cooling refers to the forced circulation of liquid driven by the pump to take away the heat of the heatsink. Compared with air cooling, it has the advantages of quiet, stable cooling and less dependence on the environment.
The heat dissipation performance of the liquid cooling heatsink is directly proportional to the flow rate of the cooling liquid (water or other liquids), and the flow rate of the cooling liquid is related to the water pump power of the refrigeration system. And the heat capacity of water is large, which makes the water-cooled refrigeration system have a good heat load capacity. Equivalent to 5 times of the air cooling system, the direct benefit is that the working temperature curve of CPU is very flat. For example, the system using air-cooled radiator will have a temperature peak in a short time when running the program with large CPU load, or it may exceed the CPU warning temperature, while the water-cooled cooling system has a much smaller thermal fluctuation due to its large thermal capacity.
