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Cooling fan manufacturers explain: What misunderstandings do you have about CPU cooling fans?

2021-10-23 08:18:15
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Cooling fan manufacturers explain:What misunderstandings do you have about CPU cooling fans ? Next, Juwang Electronics will explain to you:

1. Using cooling software can definitely lower the CPU temperature

From the analysis of the working principle of the cooling software, the cooling software can use the HLT instructions to put the CPU into a "sleep" state, and using them should reduce the CPU temperature. If we run other cooling programs in these operating systems at this time, too many of these will cause many automatic cooling programs to interfere with each other, so that the system cannot call the HLT instruction to control the CPU to enter the sleep state, thereby destroying the cooling effect of the operating system itself. , and even cause the CPU temperature to rise sharply after the system uses the cooling software. Therefore, it seems incorrect to assert that the use of cooling software will definitely lower the CPU temperature.

DC DC cooling fan

2. The higher the fan power, the better the cooling effect

In theory, the higher the fan power, the better the heat dissipation effect, but this theory is established under certain premise, that is to say, the better the heat dissipation effect is when the working power of the fan does not exceed the rated working power. In general, the stronger the wind, the better the cooling effect. The power of the fan is directly related to the speed of the fan, that is to say, the higher the fan speed, the stronger the fan. When choosing a CPU fan, our users should not mistakenly think that the higher the fan power, the better the cooling effect, but should choose the fan suitable for their computer according to the principle of self-sufficiency.

3. The operation effect of the cooling fan has nothing to do with the ambient temperature

Because the CPU cooling fan often works in an indoor environment, and the indoor temperature is just enough to ensure that the cooling fan runs smoothly at high speed, many people take it for granted that the operating effect of the cooling fan is irrelevant to the ambient temperature. The computer is not operating in harsh conditions and low temperature environments. In addition to paying attention to the temperature of the operating environment, we also need to add antifreeze lubricant to the fan to ensure that the CPU cooling fan can operate normally under low temperature conditions.

4. The cooling fan is installed reversely, and the fan cannot rotate

Is the cooling fan installed upside down? Of course, no one wants to try to install cooling fans themselves, but they're not afraid of 10,000, just in case. Can you still turn? Many people will say that if it is installed backwards, it will definitely not turn. In fact, this view is wrong. From the practical point of view, even if the clip of the cooling fan is reversed, the fan can still run, but this operation cannot achieve the effect of heat dissipation, and the rotation time is not long, which will cause the temperature of the system CPU to rise, making the motherboard The CPU temperature monitoring component comes into play. After the frequency is reduced, the CPU is prone to frequent crashes and automatic crashes. If the shutdown is severe, the cooling fan or CPU may be damaged. Therefore, the author recommends that when installing the CPU, do not install the fan clip in the opposite direction, and do not try to install the fan in the opposite direction, so as to avoid unnecessary losses.

5. High-priced fans must have good cooling effect

The price difference between fans is huge. The cheap ones are only ten yuan, and the expensive ones may cost hundreds of yuan. Considering the issues that directly affect CPU life, it's worth spending a little more here, but not the price. The more expensive the better. From the point of view of the consumption concept of ordinary users, the expensive price is the product of excellent quality. The higher the price of the cooling fan, the quality and performance of the cooling fan should be better than other types, but this is not the case. The more expensive the cooling fan is, it does not mean that the fan's power is larger and the speed is faster. Its expensive value may be reflected in better fan materials, high fan brand awareness, high demand for fans or other auxiliary functions. If the high price of a fan is for these reasons, then not all the features of the fan will work on all consumer computers. In addition, the quality of the cooling effect is not only related to the cooling fan, but also whether the cooling fan can coordinate with the CPU. In this sense, if the high-priced fan cannot effectively cooperate with the CPU in your computer, it will not only fail to achieve the ideal cooling effect, but may also damage the CPU in serious cases. Therefore, you should understand and compare more carefully before purchasing. There are also many "cheap and easy to use" cooling fans on the market. Therefore, it is one-sided and wrong to measure the cooling effect of the cooling fan only by price. It is best to choose the cooling fan recommended by the CPU manufacturer.

6. The fan must be installed firmly to reduce noise

Just imagine, if the fan is not firmly fixed to the heat sink , but very loose, what kind of phenomenon will such a fan produce when it rotates at high speed? Many people will definitely blurt out, fans will definitely have a very strong statement, in fact, this statement is also very one-sided. While many fans on the market today have the cooling fan firmly attached to the radiator , there are also some that don't attach the fan directly to the radiator, but instead attach to a plastic frame. We all know that one of the noise sources of fans is caused by resonance. To reduce noise from this cause, many fans are held in place with flexible plastic frames to prevent resonance. After the fan is directly attached to the plastic frame, the plastic frame is attached to the heat sink by clips. When you tap the four corners of the fan, you will find that the fan has a certain amount of space for movement. That doesn't mean it's not fixed. It is a special design that reduces the noise when the fan is running. Therefore, the statement that the fan must be installed securely to reduce noise is false!

7. The larger the heat dissipation area, the better the heat dissipation effect.

Since the heat generated by the CPU is conducted to the heat sink, and then the cool air brought by the fan is blown away, the heat of the heat sink is taken away, and the heat that the fan can conduct is related to the size of the heat sink. Generally speaking, in other words, the larger the contact area between the heat sink and the air, the better the cooling effect of the fan, but this statement has a certain premise, that is, when there is enough remaining space in the chassis. If the computer case does not have much cooling space, if there is not enough remaining space, it is difficult to install a large-area radiator into the case. Even if it barely fits in a case, the large contact area blocks the heatsink. The surrounding hot air dissipates quickly, causing the overall temperature inside the case to be too high, affecting the performance of the entire computer. Therefore, the author suggests that the size of the heat dissipation area should match the casing, rather than pursuing a large area. radiator.

8. The larger the fan blade, the larger the exhaust air volume.

It is wrong to say that the larger the fan blade, the larger the fan exhaust volume, because the fan exhaust volume is a comprehensive indicator, it is a more direct factor to measure the performance of a fan, and its size is not only related to the size of the fan blade It is related to the design form of the fan blade, the thickness of the fan blade and the angle of the fan blade. If the fan has a large blade size, but if the blade is flat, no airflow will be created, and the fan has zero exhaust air volume, so it is related to the exhaust air volume. Angle of cooling fan and fan blades. is the decisive factor. When purchasing a fan, if you want to check the exhaust air volume of the fan, just put your hand close to the heat sink and feel the strength of the blowing air. Location, you can also feel the airflow in the wind.

9. The higher the fan speed, the better the cooling effect

Many people think that the higher the fan speed, the more heat it takes away from the CPU, and the easier it is to cool the CPU, but this is not the case. If the fan speed exceeds its standard value, when the fan is overloaded for a long time, the heat taken from the CPU is less than the heat generated by high-speed rotation, so the longer the running time, the worse the heat. The larger the fan, the higher the cooling fan speed, the higher the CPU temperature, the higher the cooling fan speed. It may cause the fan or CPU to be scrapped; in addition, to make the fan run at high speed, there must be a high power supply, and the large power supply is obtained from the motherboard and the power supply, and the high power in the motherboard and the power supply. Under overload power, it often causes the system unstable. Therefore, it does not mean that the higher the fan speed, the better the cooling effect.


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