peaking of computer radiator, we usually think of CPU radiator, chassis radiator, etc., because the graphics card radiator is brought by the graphics card, so it is easy to be ignored by everyone. In fact, as the component with the largest power consumption in computer hardware, the calorific value of the graphics card can not be underestimated, and the quality of the graphics card radiator determines the heat dissipation capacity of the graphics card and will also have an impact on the game experience.

At present, the graphics cards on the market are roughly divided into three types: generally practical air-cooled heat dissipation, noble and delicate water-cooled heat dissipation and liquid nitrogen heat dissipation.

Air cooling is the most common heat dissipation method, and it is also the most acceptable and convenient heat dissipation method for players;

The water cooling is relatively high, and the heat dissipation effect is much better, but the cost is high, the installation is not easy, and it is difficult for ordinary players to control it easily. If the installation fails to pass the customs, it is also very sad to leak water;

Liquid nitrogen heat dissipation can be said to be the killing Matt of the heat dissipation family. It is high and cold without losing temperament. It has deep skills. It is also a very normal phenomenon to accidentally agglomerate ice on the graphics card, that is, it is too far away from ordinary players.

1、 Air cooled heat dissipation

First, let's talk about the most common air cooling that most players have the most contact with. The air cooling radiator is mainly composed of fan, copper bottom, fin and copper bottom. The heat dissipation object is mainly the core GPU of the graphics card. In the spirit of rain and dew, the components such as video memory and power supply circuit are also blown with help. The working principle is very simple, The GPU heat of the graphics card is delivered to the heat pipe through the copper bottom, distributed to the heat dissipation fins through the heat pipe, and the heat is evenly distributed through the heat dissipation fins. Finally, the continuous air flow generated by the graphics card fan continues to export the heat on the fins, so as to finally achieve the effect of heat dissipation for the graphics card.

Of course, the major graphics card brands have developed their skills to play a different realm of air cooling and heat dissipation. For example, sotai has created a 3D storm three-dimensional heat dissipation system, which is very eye-catching. In short, two fans are installed on the back of the graphics card, equipped with small fans to supply power to the back of the graphics card and heat dissipation at the GPU, and heat the PCB by direct blowing, Effectively reduce PCB temperature.

The four heavenly kings of air-cooled cooling fan, copper bottom, fin and copper bottom are very diverse, with different materials, designs and specifications, and different heat dissipation capacities. Let's start with the most high-profile and coquettish fan. At first glance, the fan is simple. In fact, there are many ways in it. Fan style, number and size will have varying degrees of impact on heat dissipation.

The turbine fan adopts the principle of centrifugal force, which can ensure the outlet air pressure while the system air flow, with strong penetration, high speed, large air volume and relatively large noise; Axial flow fan is a common fan in our daily life. The air flow of this fan is disordered, but the diameter is large and the noise is low. The disordered air flow combined with dense fins also reduces the blind spot of heat dissipation to a certain extent.

When the axial fan blades are the same, the number of fans has a direct impact on the heat dissipation. Just like building a house, everyone builds at the same speed. Of course, the more the number of fans, the faster the overall speed, that is, the more the number of fans, the faster the heat dissipation; The same principle applies to the size of the fan. In the case of the same number of people, the larger the fan, the faster the masonry speed, the faster the overall speed, and the faster the heat dissipation.

In addition, in terms of fan control, it is also the focus of further optimization of air cooling and heat dissipation. Naturally, it can not be controlled by it. For example, sotai, ASUS and other brands have adopted fan intelligent start and stop technology. The fan stops when the GPU is under light load, which reduces the noise of the radiator and prolongs the service life of the fan, The fan speed can even be regulated by software, such as firestorm software of sotay graphics card.

It can be seen that the major brands have spent a lot of effort on the fan alone.

In addition to the fan, another thing to pay attention to is the heat pipe. Common heat pipes include sintered heat pipe and grooved heat pipe. The graphics card radiator mainly adopts sintered heat pipe, and the efficiency is also higher. Many people who don't know think that the heat pipe is solid. Heat is introduced into the fins through the thermal conductivity of the heat pipe. In fact, there is some water inside the closed heat pipe. The liquid absorbs the high-temperature vaporization generated by GPU. The vaporized liquid flows inside the heat pipe, gradually releases heat and condenses, and transmits the temperature through the whole heat pipe, so as to achieve the role of heat conduction and heat dissipation, The larger the diameter and quantity of the heat pipe, the more liquid it can hold, and the higher the heat conduction efficiency.

In order to improve the service life and beauty of the heat pipe, many brands will plating a layer of nickel on the toilet surface of the heat pipe, which not only improves the beauty of the radiator, but also has many functions such as wear resistance, corrosion prevention and rust prevention. Therefore, the heat pipe with nickel plating is naturally more sincere than that without nickel plating.

As the matchmaker between the heat pipe and the fan, the role of the fin in the whole radiator can not be ignored. The heat is received from the heat pipe by the fin, spread throughout the whole radiator, then handed to the fan, and thrown out of the graphics card by the fan.

How to distinguish the advantages and disadvantages of fins? The heat dissipation efficiency of fins is mainly affected by three factors: the contact area between fins and air, the contact area with heat pipe and welding process. The denser the fins, the higher the height, the larger the contact area with air, and the higher the heat conduction efficiency; The larger the contact area between the fin and the heat pipe, the higher the heat conduction efficiency; At the same time, the welding process of heat pipe and fin is also based on this principle. The purpose of welding is to more closely combine the fin and heat pipe, improve the contact area and enhance the heat conduction efficiency.

2、 Water cooling and heat dissipation

In fact, the principle of water cooling is the same as that of air cooling, except that water cooling transports the heat of Gu to the heat exchanger through continuously circulating liquid and then radiates it, replacing the heat pipe for air cooling, but the advantages of water cooling are obvious. It not only exports GPU heat more evenly, but also has low noise. At the same time, due to the large specific heat capacity of water, Therefore, it can absorb a lot of heat and keep it at a lower temperature.

However, water cooling also has obvious disadvantages. First, the price is expensive, which discourages many players. Second, the use threshold is high. Many players have had the experience of water leakage and burning the circuit board inside the computer for reasons such as failure to install it well. Moreover, with the increase of service life, the risk of water cooling is also increasing in direct proportion. Therefore, the development of water cooling scheme is still limited to a small number of high-end graphics cards.

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