1. Using cooling software can definitely reduce CPU temperature

       From the working principle of cooling software, cooling software can use HLT instructions to put the CPU into "sleep" state. Using them should be able to reduce the CPU temperature. The author has also tried cooling software under Win95 operating system and found that this software can indeed reduce the CPU temperature by about 3 degrees. However, we must not think that cooling software can effectively reduce the CPU temperature in any working environment. Because the author later used the same cooling software under Win98 operating system and found that the CPU temperature did not drop significantly when idle, and sometimes the temperature was slightly higher. What's going on? It turns out that operating systems such as Win98, WinXP and Win2000 already have the function of cooling software. Improvements have been made in the CPU cooling link, so that the CPU can automatically cool down when idle; if we run other cooling programs in these operating systems at this time, these excessive automatic cooling programs will interfere with each other, causing the system to be unable to call HLT instructions to control the CPU to enter the sleep state, thereby destroying the cooling effect of the operating system itself, and even causing the CPU temperature to rise sharply after the system uses the cooling software. Therefore, the idea that using cooling software can definitely reduce CPU temperature is incorrect.

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

       Theoretically, the greater the fan power, the better the cooling effect should be. However, this theory is established under certain premises, that is, under the condition that the fan's operating power does not exceed the rated operating power, the greater the fan power, the stronger the wind force and the better the cooling effect. The fan power is directly related to the fan speed, that is, the higher the fan speed, the stronger the fan. At present, the general computer market sells 12V DC, and the power ranges from 0.X watts to 2.X watts. The power size needs to be selected according to the heat generated by your CPU. In theory, it is better to choose a slightly larger power because the speed of this fan is higher. But the author here also reminds everyone that we cannot emphasize high power one-sidedly. This needs to match the power of the computer itself. If the power is too large, it will not only fail to achieve a good cooling effect, but may increase the workload of the computer, which will produce a vicious cycle and ultimately shorten the life of the CPU fan . Therefore, when we users choose a CPU fan, we must not mistakenly believe that the fan power is large and the cooling effect will definitely be good, but we should choose a fan that matches our computer based on the principle of sufficient use.

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

       Since CPU cooling fans often work in indoor environments, and the indoor temperature just ensures that the cooling fans can run smoothly at high speed, many people take it for granted that the operation effect of the cooling fan has nothing to do with the ambient temperature. In fact, people who have this misunderstanding have never run computers in harsh conditions and low temperature environments. Once you use the computer in extremely low temperature ice and snow, even if it is a newly purchased CPU cooling fan, it won't take long for you to feel that the cooling fan's operation effect is very poor. The external phenomenon is that the noise is very loud during operation, and the rotation is not smooth at the moment when the computer is just started. Why does this phenomenon occur? It turns out that in an extremely low temperature environment, the lubricating oil applied to the shaft of the cooling fan fails, causing the cooling fan to rotate very hard at the initial startup. In severe cases, it will vibrate with a loud noise. Therefore, in order to ensure that the cooling fan has a good operation effect, in addition to paying attention to the temperature of the use environment, we must also add antifreeze lubricating oil to the fan to ensure that the CPU cooling fan can also operate normally under low temperature conditions.

4. If the cooling fan is installed upside down, the fan will not rotate

       Have you ever installed the clip of the cooling fan upside down? Of course, no one wants to try to install their cooling fan upside down, but it is better to be safe than sorry. If you accidentally install the cooling fan upside down, will the fan still rotate? Many people will say that it will definitely not rotate if it is installed upside down. In fact, this view is wrong. From the actual operation point of view, even if the clip of the cooling fan is installed upside down, the fan can still rotate, but this operation cannot achieve the cooling effect, and the rotation time is not long, which will cause the system CPU temperature to rise. In this way, the CPU temperature monitoring component on the motherboard will play a role. After the CPU frequency is reduced, it is easy to frequently freeze and automatically shut down. In serious cases, 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 wrong position, and do not try to install the fan upside down to avoid unnecessary losses.

5. Expensive fans definitely have good heat dissipation effects

       The prices of fans vary greatly, with the cheapest costing only a dozen yuan and the most expensive costing hundreds of yuan. Considering the direct impact on the life of the CPU, it is worth spending a little more money here. However, it does not mean that the more expensive the price, the better. In the consumption concept of ordinary users, you get what you pay for. The higher the price of the cooling fan, the better its quality and performance should be 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 greater or the speed is faster. Its expensive value may be reflected in the better materials used to make the fan, the high brand awareness of the fan, the large demand for the fan, or other auxiliary functions. If the high price of the fan is caused by these reasons, then the high-priced fan purchased may not be suitable for all the functions of all consumers' computers. In addition, the quality of the cooling effect is not only related to the cooling fan, but also to 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 learn more about it before buying. There are still many "cheap and good" cooling fans on the market. Therefore, it is one-sided and wrong to measure the cooling effect of the cooling fan by the price alone. It is best to choose the cooling fan recommended by the CPU manufacturer.

6. The fan must be installed securely to reduce noise

       Imagine if the fan is not firmly fixed on the heat sink, but is very loose, what kind of phenomenon will such a fan produce during high-speed rotation? Many people will blurt out that the fan will definitely produce very strong noise. In fact, this statement is also very one-sided. Although many fans on the market currently fix the cooling fan firmly on the heat sink, there are also fans that do not fix the fan directly to the heat sink, but fix it on a plastic frame. We all know that one of the sources of fan noise is caused by resonance. In order to reduce the noise caused by this reason, many fans are fixed by an elastic plastic frame to prevent resonance. After this fan is directly fixed to the plastic frame, the plastic frame is fixed to the heat sink through a buckle. When the four corners of the fan are lightly pressed, it will be found that the fan has a certain amount of room for movement. This is not because it is not fixed firmly, but a special design is adopted to reduce the noise when the fan is running. Therefore, the view that the fan must be installed firmly to reduce noise is biased!

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

       The heat generated by the CPU when it is working is conducted to the heat sink, and then the cool air brought by the fan blows away the heat of the heat sink. The amount of heat that the fan can conduct is related to the size of the heat sink. Generally speaking, the larger the contact area between the heat sink and the air, the better the heat dissipation effect of the fan. However, this statement is based on a certain premise, that is, there is enough spare space in the case. If the computer case does not have a large heat dissipation space, it will be difficult to install a large heat sink in the case without enough spare space. Even if it can be installed in the case, the large contact area will prevent the hot air around the heat sink from dissipating quickly, resulting in the overall temperature inside the case being too high, which will affect the performance of the entire computer. Therefore, the author recommends that the size of the heat sink area should be matched with the case, and large heat sinks should not be pursued blindly.

8. The fan with large blades has a large exhaust volume

       It is wrong to say that a fan with large blades has a large exhaust volume, because the exhaust volume of a fan is a comprehensive indicator. It is the most direct factor to measure the performance of a fan. Its size is not only related to the size of the fan blades, but also to the design of the blades, the thickness of the fan, and the deflection angle of the blades. If the blades of a fan are large, but if they are flat, no airflow will be formed, and the exhaust volume of the fan will be zero. Therefore, the angle of the blades is the decisive factor in the exhaust volume of the cooling fan. When buying a fan, if we want to check the exhaust volume of the fan, we just need to put our hands near the heat sink to feel the strength of the wind. Usually, for fans with large exhaust volume, we can feel the airflow even if we are far away from the fan.

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

       Many people think that the higher the fan speed, the more heat it will take away from the CPU in the same period of time, so the CPU will be easier to cool. This is not true. If the fan speed exceeds its standard value, then when the fan runs under overload for a long time, the heat it takes away from the CPU will be less than the heat it generates during high-speed rotation. The longer the fan runs, the greater the heat difference will be. In this way, the high-speed fan will not only fail to achieve a good cooling effect, but will greatly increase the CPU temperature. Moreover, the higher the speed of the cooling fan, the louder the noise it may generate during operation, and in serious cases, the fan or CPU may be scrapped. In addition, in order to make the fan run at high speed, it must have a larger power source to provide power, and the high power source is obtained from the high power in the motherboard and power supply. The motherboard and power supply will often cause system instability under overload power. Therefore, the statement that the higher the fan speed, the better the cooling effect is not true.

        Shenzhen Huaxinrong Plastic Electronics Co., Ltd. (a subsidiary of Dongweifeng) was established in 2008. It mainly produces and develops a series of products such as AC and DC cooling fans and DC motors. In today's rapidly changing modern technology, all colleagues of Dongweifeng will continue to dedicate high-quality products and services to our customers, and strive to become an indispensable partner for every customer to achieve success.

        Shenzhen Dongweifeng Electronic Technology Co., Ltd. was established in 1991. It is a national high-tech enterprise. It has now developed into a professional supplier of cooling solutions and products for computers, electronics, etc. The company has successfully passed ISO9001:2000 quality system certification, ISO14001:2004 environmental system certification and UL. TUV. CE product certification. As a national key high-tech enterprise focusing on R&D, manufacturing and sales, it has formed three pillar industries: computer electronic radiators, cooling fans; LED lighting, outdoor landscape lighting engineering lighting; and architectural decorative panels.