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With the continuous development of computer hardware technology, as an important cooling component, the performance and installation method of cooling fans are increasingly attracting the attention of users. Especially when DIY assembling or upgrading computers, correctly installing the cooling fan and connecting its power cord are key steps to ensure stable system operation. This article will provide a detailed introduction to the pin insertion method for DC cooling fans, helping users understand and correctly install the cooling fan.

Classification and interface of cooling fans

According to different interfaces, cooling fans are mainly divided into three types: 2-pin, 3-pin, and 4-pin. Among them, the 2-pin fan only has basic power supply and grounding functions, and cannot measure and adjust speed; The 3-pin fan has added a speed measurement line on the basis of the 2-pin, which can monitor the fan speed; The 4-pin fan further introduces PWM (Pulse Width Modulation) function, which can more accurately and flexibly control the fan speed to meet different heat dissipation needs.

Pin insertion method for DC cooling fan

Insertion method of 3-pin fan

For a 3-pin DC cooling fan, its pins usually include positive (red or yellow), negative (black), and speed measuring wire (yellow or green). The correct insertion method is to insert these three pins into the CPU FAN socket on the motherboard. This socket is usually located around the CPU on the motherboard and is also known as the CPU fan socket. Through this socket, the motherboard can monitor the fan speed in real time and adjust the fan voltage as needed to control the fan speed.

Insertion method of 4-pin fan

The 4-pin DC cooling fan has added a PWM line on top of the 3-pin one to achieve more advanced speed control. The color of its pins may vary from manufacturer to manufacturer, but typically includes positive, negative, speed measurement, and PWM wires. The 4-pin fan should be inserted into the interface labeled 4pin or PWM FAN on the motherboard. This interface adjusts the fan speed through PWM mechanism, making the fan speed control more precise and flexible.

Installation precautions

Ensure that the computer is turned off and the power plug is unplugged: Before plugging in or unplugging the fan plug or performing any hardware installation, be sure to turn off the computer and unplug the power plug to prevent electric shock or hardware damage.

Check the direction of the fan: When installing the fan, make sure that the blowing direction of the fan is correct, so as to blow heat out of the chassis from the heat source (such as the CPU).

Avoid gaps: When installing the fan, there should be no gap between the fan and the panel to ensure maximum heat dissipation.

Pay attention to wind direction and cross-sectional area: Sudden changes in wind direction and cross-sectional area can weaken the heat dissipation effect, so this situation should be avoided.

Use appropriate mounting holes: The diameter of the mounting holes for the fan should be larger than the diameter of the fan to ensure a stable installation.

Selection of Cooling Fan Manufacturers

When choosing a cooling fan, in addition to paying attention to its pin type and interface, it is also necessary to consider factors such as the fan's cooling performance, noise level, durability, and the manufacturer's after-sales service. Shenzhen Jixiangjia Motor Co., Ltd., as a professional manufacturer of cooling fans, focuses on the research and development, production, and sales of cooling fans. With advanced production equipment and technical strength, we can provide customers with high-quality and high-performance cooling fan products.

In short, correctly installing and connecting the pins of the cooling fan is an important step in ensuring the stable operation of the computer system. I hope the introduction in this article can help users better understand the pin insertion method of cooling fans and choose suitable cooling fan products.