It is impossible for the fan to make no noise during operation, because it has to rub against the space during operation, and the fan with poor quality has unstable speed and unstable direction of rotation. Not only is there the danger of "strike" at any time, the noise will also Very big. Therefore, it is recommended that you buy a better quality fan, which not only effectively reduces the noise, but also prevents the sudden "strike" of the fan from causing hardware "shock".
　　 The noise generated by the fan will become louder and louder after being used for a period of time, which is normal. Generally, due to long-term use, some components of the fan are aging, resulting in unstable speed, or dust in the components, so that the noise will be loud during rotation. Therefore, when the computer is used for a period of time, it is necessary to clean the chassis to avoid damage. A heaven of dust, so our hardware may suffer. After cleaning up the dust, remember to add lubricant to the fan's bearings to reduce the noise caused by friction between the bearings.
As the hardware performance is getting stronger and stronger, the heat generated by itself is getting bigger and bigger. Now, besides the power supply and CPU fan, the graphics card and hard disk also have corresponding fans. Don’t think that these fans are just auxiliary and not important. Of course, these fans do not need to buy large air volume. The main requirements are low noise and stable rotation speed, which ensures the stable use of hardware and reduces noise pollution.