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Time：2021-09-01Views：0
Some of our computer’s cooling fans have 4 lines, and they are mainly used to dissipate heat on the CPU, so why does the cooling fan on the CPU have 4 lines, while others such as the chassis and power supply have only 2 lines, and the more 2 lines What are the lines used for?
The real 4-wire cooling fan is a smart fan. Generally, the red wire is the positive pole of the power supply, the black wire is the negative pole of the power supply, the yellow wire is the FG pole, which is the speed monitoring signal wire, and the green wire is the PWM wire, which automatically adjusts the frequency of use of the computer. A function line for the speed of the cooling fan, remove the latter two lines, the cooling fan is also running, but two functions are missing.
Adding the PWM function can effectively increase the service life of the cooling fan. More importantly, when we are using a low CPU frequency, the system will automatically lower the speed of the cooling fan to make the cooling fan quieter.
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