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 First, the fan must be installed firmly to reduce noise
Imagine if the fan is not firmly fixed on the heat sink, but it is loose, what kind of phenomenon will such a fan produce during high-speed rotation? Many people will definitely blurt out and the cooling fan will definitely produce a strong noise. In fact, this statement is also very one-sided. Although many fans on the market currently have the cooling fan fixed firmly on the heat sink, the fan does not directly fix the fan to the heat sink, but is fixed on a plastic frame. We all know that one of the noise sources of the fan is caused by resonance. In order to reduce the noise caused by this cause, many cooling fans are fixed by a flexible plastic frame to prevent resonance. After the fan is directly fixed to the plastic frame, the plastic frame is fixed to the heat sink by the buckle. When the four corners of the cooling fan are lightly pressed, the fan has a certain amount of space for movement, which is not fixed. Not strong, but a special design to reduce the noise when the fan is running. Therefore, the argument that fans must be installed firmly to reduce noise is biased!
Second, the larger the heat sink area, the better the heat dissipation effect, not necessarily
    Since the heat generated during the operation of the product is transmitted to the heat sink, the heat of the heat sink is taken away by the cold air blown by the fan, and the amount of heat that the fan can conduct is related to the size of the heat sink. In other words, the larger the contact area between the heat sink and the air, the better the heat dissipation effect of the heat dissipation fan, but this statement has certain premise, that is, when there is enough remaining space in the chassis. If the space of the computer's chassis is not large enough, if there is not enough space left, the heat sink with a large area will be difficult to install into the chassis. Even if it can barely be installed in the chassis, too much contact area will block the heat sink. The surrounding hot air quickly dissipates, which leads to the overall temperature inside the chassis is too high, which affects the running performance of the entire computer. Therefore, I suggest that the size of the heat sink area should be matched with the chassis, and the area cannot be pursued one by one.
Third, the high-priced fan definitely has a good heat dissipation effect, not necessarily
    The price difference between cooling fans is very large, the cheapest is only a dozen yuan, and the most expensive may reach hundreds of dollars. Considering the problem that directly affects the life of the fan, it is worthwhile to spend a little more money here, but it is not The more expensive the price, the better. In the view of the general consumer's consumption concept, the first-class price, the higher the price of the cooling fan, its quality and performance should be better than other types of products, in fact, this is not the case. The more expensive the cooling fan is, it does not mean that the power of the fan is large and the speed is fast. Its expensive value may be reflected in the fact that the fan making materials are better, the fan brand is high, the fan demand is large, or there are other auxiliary functions. If the high price of the fan is caused by these reasons, then the high price of the purchase is high. Fans don't necessarily have all the functions that are suitable for all consumers. In addition, the heat dissipation effect is not only related to the cooling fan, but also related to whether the cooling fan can coordinate with the product. In this sense, if the cooling fan is expensive Can not effectively cooperate with your own products, not only will not achieve the desired heat dissipation effect, and if it is serious, it may damage your product. Therefore, everyone should know more about the comparison with Doka before buying. There are still many "cheap and good" cooling fans on the market. Therefore, it is one-sided and wrong to measure the heat dissipation effect of the cooling fan by the price.