When buying a computer cooling fan, you can usually ascertain fans of variant interfaces. Common fans with 2 pin, 3 pin and 4 tholepin. What is the difference between them?
1.What is the Difference in 2 or 3 Wire vs 4 Wire CPU Fans?
Some Noesis about 2 Pin Computing machine Fans
The 2-pin cooling buff means that it has only two red and black power cables.The structure is very simple and thither is no variable frequence and speed interchange function. Now 2 pin temperature reduction fans take over been less to use, because the fan of 2 pin cannot meet the requirements in footing of shifting, etc., In line, 3 trap, 4 pin fan is the main stream now.
2.Advantages to 3 Pin vs 4 Pin Fans
3 Bowling pin Reckoner Fan
The 3 connector sports fan is very coarse use in laptop, it can adjust the fan speed according to the CPU temperature, but the flexibleness is poor. On that point are cherry-red and smuggled power line founded on the increase of a yellow or black fearful line, mainly for speed measurement, done the motherboard can observe whether the fan is rotating and speed of the fan.
Disadvantages of the 3 fan connector :
The speed adjustment of the 3 pin cooling system fan is achieved by adjusting the lover voltage. In addition, it is needful to reassert if the motherboard supports the speed regularization. IT is obvious that 3-pin CPU fan adjustment speed is non flexible enough to reverberate the status of the processor in real fourth dimension, and various settings demand to constitute successful in the BIOS.
Different fans take up different opening voltages, and the voltage regularization is not elongate. The voltage control speed may cause the low voltage to fail to reach the required starting voltage of the fan, and the laptop fan may stop working.
When replacing the fan, you also need to consider whether the motherboard supports it, e.g.: whether 3 pin fans on 4 pin motherboards can workplace.
How Does 4 Processor Fan Connector Work?
The 4-pin cooling fan is based on the 3 pin and has a PWM line (pulse width transition). The so-called PWM channel uses the PWM mechanism to adjust the fan speed, and the fan electric potential is constant, avoiding the control voltage to shift. The PWM fan does not need to trust connected the motherboard BIOS, which is more convenient. The PWM pulse signal can output different responsibility cycle (Duty Cycle), and the duty cycle between 0-100% john adjust diametric fan speeds, so IT can be accurately and flexibly controlled.
There are also low-speed PWM and high-speed PWM in PWM speed regulation. The low-relative frequency PWM measurement speed has a wider range, but there will be noise generated away rooter commutation. In contrast, eminent-frequency PWM testament be advisable overall.
If the 4 pin user interface of approximately motherboards is not PWM, and then even if the cooling buff is controlled away 4 pin PWM, information technology crapper't be intelligently regimented. Some motherboards English hawthorn be voltage restrained.
Summary:
In laptops,just about every last notebook fans use 3 pin or 4 pin connectors. If you want to replace your laptop fan, it is recommended that you buy 4 pin laptop fans, which is smarter and quieter than a 3-pin laptop fan. GEMWON is a professional laptop fan wholesaler, you can buy each trade name original laptop fans here, including HP/Dingle/Asus/MacBook.
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Source: https://www.laptop-parts.com/blog/Difference-in-2-Pin-Fan-and-3-or-4-Pin-Fan
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