CPU fan knowledge misunderstanding

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 CPU temperature. 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 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 cooling software. Therefore, the view 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, but 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 its 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. When choosing a CPU fan, we users should not mistakenly believe that a large fan power will definitely have a good cooling effect, but should choose a fan that matches our computer based on the principle of being sufficient.
3. The operating effect of the cooling fan has nothing to do with the ambient temperature
Since the CPU cooling fan often works in an indoor environment, and the indoor temperature just ensures that the cooling fan can run smoothly at high speed, many people take it for granted that the operating effect of the cooling fan has nothing to do with the ambient temperature. In fact, people who have this misunderstanding have never run a computer in an environment with harsh conditions and low temperatures. 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's better to be safe than sorry. If the cooling fan is accidentally installed upside down, can the fan still rotate? Many people will say that if it is installed in reverse, it will definitely not turn. In fact, this view is wrong. From the actual operation point of view, even if the clip of the cooling fan is installed in reverse, the fan can still run, 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 reverse, and do not try to install the fan in reverse to avoid unnecessary losses.
5. High-priced fans must have good cooling effects
The price difference between fans is very large. The cheapest is only a dozen yuan, and the most expensive may reach hundreds of yuan. Considering the issue that directly affects the life of the CPU, it is worth spending a little more money here. However, it is not necessarily better if the price is more expensive. 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 material of 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 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, everyone should understand and compare in detail before purchasing. There are still 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 by the price alone. It is best to choose the cooling fan recommended by the CPU manufacturer.