Taiwan fan brand introduces the type of interface of cooling fan.Heater Fan sales

　　The cooling fan is installed in the computer, which is very important for the normal operation of the computer. We all know that the correct installation of the cooling fan is very important for the cooling fan to function properly in the computer. The interface of different fans may be different. Next, the Taiwan fan brand will introduce the cooling fan interface.

　　Why do some cooling fans sell for hundreds of dollars while others only sell for tens of dollars? Why are some fans noisy and others are low? Talking about the interface of the computer cooling fan, have you understood this?

　　By interface

　　There are many types of cooling fans, so according to the interface, they can be divided into 2-pin, 3-pin and 4-pin, that is, 2pin/3pin/4pin.

　　2pin fan

　　The 2pin fan is very simple. There are only two red and black wires, one is connected to power and the other is grounded. The structure is very simple, so it has no function. Of course, there are fans with a large 4pin interface, but this kind of fan is actually a 2-pin fan, such as Cooler Black. whirlwind. This type of fan has no variable speed function, the interface is powered by 12V, and the large 4pin interface is used for greater power, so the speed is naturally fast, but the noise is very loud, because there is no variable speed capability, then the fan will always be Crazy spin, regardless of whether the CPU is hot or not. If you like to install your own machine, don't choose this.

　　3pin fan

　　It is precisely because the 2pin fan cannot adjust the speed, so there is a 3pin fan, because when we are using the computer, the CPU does not always work at full load, so if the fan runs at full speed, it will bring two problems , First, the CPU does not generate much heat, and the fan does not need to run so fast, which wastes electricity. Second, the CPU runs at full speed and will generate a lot of noise.

　　On the basis of the red and black lines, the 3pin fan adds a yellow line. The main function of the yellow line is to measure the speed. With the yellow line, the motherboard can monitor the operation of the fan, but the 3pin fan also has shortcomings, because it uses voltage regulation to This adjustment method is not flexible enough to realize the change of the speed. First, the temperature detection of the CPU is done by the motherboard, and the temperature information fed back by the motherboard must have errors. Second, the motherboard needs to set a lot of parameters, but some motherboards do not support that Multiple fans are set, so players need to know the specific BIOS functions of the motherboard when buying a motherboard.

　　In addition, different fans have different starting voltages. Maybe after the motherboard lowers the voltage, the A fan can reduce the speed, but the B fan directly stops.

　　4pin fan

　　Because 3pin fans did not solve the problem of fan speed adjustment very well, Intel and other manufacturers later introduced new speed regulation specifications, upgrading from 3pin to 4pin, and the extra line is called PWM line, which is pulse width modulation. . The color of the line is generally black, yellow, green and blue or black, red, yellow and blue. The common point is that the blue is the PWM line, and the black is the ground line.

　　The 4pin fan voltage is constant, and the fan speed is adjusted through the PWM mechanism. The PWM pulse signal can output different duty ratios, so different fan speeds can be adjusted according to actual needs, which is more accurate and flexible, and the fan with PWM mechanism does not need to rely on the motherboard. BIOS (not independent of the motherboard), there are also classifications of PWM at present, vulgar PWM and high-speed PWM. Generally speaking, the overall performance of high-speed PWM is the best.

　　Precautions

　　Even if you buy a fan with a 4pin interface, pay attention to whether the motherboard is controlled by PWM. Some 4pin fans still cannot be adjusted after they are connected to the motherboard, so the problem is the motherboard. When buying a motherboard, look at the manual or understand the relevant parameters of the motherboard in advance. If NC/VCC is mentioned, it does not support PWM speed regulation. At present, it is the best choice to choose a 4pin fan that supports PWM speed regulation and PWM function.

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