CPU 风扇(CPU fan)不仅仅是一个风扇。它不仅通过电源引脚/电线连接到CPU ，而且还通过传感器告诉它运行的速度。(CPU)如果CPU发热，传感器会使风扇运转得更快。因此，当您在电脑上玩游戏时， CPU风扇会运行得更快，只是为了让处理器保持凉爽。(CPU)根据其类型和型号，您的计算机中可能还有其他风扇。例如，如果您使用旧台式机，则您的SMPS也有风扇。在本文中，我们将仅限于连接到处理器的风扇，该风扇用于保持处理器冷却。既然很多人都叫它CPU，我们就叫它CPU风扇。让我们来看看为什么CPU风扇一直全速运转，如何解决。
CPU 风扇始终全速运行
第一个原因我们已经讲过了。每当CPU(CPU)温度升高时，CPU风扇就会全速运转。处理器通常使用控制风扇速度的传感器。如果CPU风扇一直全速运行，则处理器或传感器（在风扇中）可能有问题。这也可能是处理器上的散热器的问题。
传感器问题(Sensor Problem)导致CPU 风扇(CPU Fan)始终全速运行
CPU风扇全速运行的最常见原因是其传感器工作不正常。这里的解决方案是更换风扇本身。但是您需要看到处理器并不总是很热。为此，您可以使用第三方应用程序。我建议使用CPUID或XMeters的硬件监视器。它会告诉您处理器温度，从而帮助您确定风扇是在没有传感器的情况下运行还是在有传感器的情况下运行。如果您长时间没有注意到处理器温度的任何变化，则风扇传感器有问题。在这种情况下，更换风扇会有所帮助。
阅读：(Read:)如何检查 PC 的总功耗(check your PC’s total power consumption)。
某些应用程序(Certain Apps)可能会增加CPU温度
由于某些应用程序，处理器也会变热。虽然游戏和流媒体视频可能会使它变热，但如果它始终全速运行，则可能是您计算机上的某些应用程序对CPU造成了太大压力。
要检查这一点，请打开任务管理器(open the Task Manager)。转到第一个选项卡并单击CPU列标题（它说CPU）。这将导致任务管理器按(Task Manager)CPU使用率的降序排列程序和应用程序。这意味着，使用CPU较多的应用程序将位于顶部，而使用 CPU 较少的应用程序将位于它们下方。
观察一段时间。它将让您了解可能正在耗尽CPU导致CPU风扇始终全速运行的应用程序/程序。基于此，您可以尝试从计算机中删除CPU消耗最高的应用程序，然后再次检查是否有帮助。如果CPU风扇仍然全速运行，请检查处理器的散热器。
更换处理器的散热器
如果您发现风扇传感器正常工作并且没有应用程序长时间占用大量CPU资源，您可能需要更换处理器的散热器。(CPU)散热器(Heat)从处理器吸收额外的热量。如果您一直在使用计算机硬件，则可以轻松更换它们。对于其他人来说，最好的方法是让技术人员来做，因为自己做可能会损坏风扇。在卸下并重新安装CPU(CPU)风扇之前，请(Make)确保计算机已关闭。
散热器是一种粗合金（通常是铝(Aluminium)），借助白色物质附着在处理器上。如果物质干涸，它也可能导致散热器正常工作，因此您需要在更换散热器之前查看那里（如果您可以打开计算机）。
(General)避免电脑风扇一直高速运转的一般技巧
保持电脑清洁。您可以购买压缩空气，不时在电脑主板上使用。移除、清理并修复随机存取记忆(Random Access Memory)棒 ( RAM )。卸下电源后，请务必清洁计算机内部。如果您使用的是移动设备，这包括电池。有关如何物理清理 Windows 计算机、鼠标和键盘的(physically clean up your Windows computer, mouse & keyboard)更多提示。
Let us know if you have any other ideas!
阅读下一篇(Read next)：如何解决过热和嘈杂的笔记本电脑风扇问题(How to fix Overheating and Noisy Laptop Fan issues)。
CPU fan runs at full speed all the time
A CPU fan is more than just a fan. It is attached to CPU not only with power pins/wires but also a sensor that tells it how fast to run. If the CPU is heating, the sensor will make the fan run faster. As such, CPU fan runs faster when you are gaming on the computer, just to keep the processor cool. There may be other fans in your computer, based on its type and model. For example, if you use an old desktop, your SMPS also has a fan. In this article, we’ll limit ourselves to the fan attached to the processor which is used to keep the processor cool. Since many people call it CPU, we will call it CPU fan. Let’s check out the main reasons why a CPU fan runs at full speed all the time and how to fix it.
CPU Fan runs at full speed always
We’ve already talked about the first reason. A CPU fan runs at full speed whenever the temperature of CPU increases. The processor generally uses a sensor that controls the fan speed. If the CPU fan runs at full speed all the time, there might be something wrong either with the processor or the sensor (in the fan). It can also be an issue of the heat sink on the processor.
Sensor Problem causes CPU Fan to run full speed always
The most common cause why a CPU fan would run at full speed is that its sensor is not working properly. The solution here is to replace the fan itself. But you need to see that the processor is not always hot. You can use third-party applications for this purpose. I would suggest a hardware monitor from CPUID or XMeters. It will tell you the processor temperature and thus help you decide if the fan is running without a sensor or with one. If you don’t notice any changes in the processor temperature for long, there is something wrong with the fan sensors. In such a case, replacing the fan would help.
Read: How to check your PC’s total power consumption.
Certain Apps can increase the CPU temperature
The processor can heat up due to certain applications too. While gaming and streaming videos can heat it a bit, if it is always running at full speed, there is a possibility that there are certain apps on your computer that are putting too much pressure on CPU.
To check this, open the Task Manager. Go to the first tab and click on CPU column heading (it says CPU). That will cause the Task Manager to arrange programs and apps in descending order of CPU usage. It means, the apps using the CPU more will be at the top and the ones using it less will be below them.
Watch it for a period. It will give you an idea of apps/programs that might be using up CPU causing the CPU fan to run at full speed all the time, always. Based on that, you may try removing the top CPU consuming apps from the computer and then check again if it helps. If the CPU fan is running at full speed still, check out the heat sink of the processor.
Changing the Heat Sink of processor
If you find that the fan sensor is working and there are no apps using up significant CPU resource for long periods, you may want to replace the heat sink of the processor. Heat sinks absorb extra heat from the processors. They can be replaced easily if you have been playing with the hardware of your computer. For others, the best way is to get a technician to do it as doing it on own may damage the fan. Make sure the computer is turned off before you remove and re-attach the CPU fan.
The heat sink is a coarse alloy (generally Aluminium) attached to the processor with the help of a white substance. If the substance dries up, it too may cause sink to function properly so you would want to take a look there (if you can open the computer) before changing the heat sink.
General tips to avoid computer fan running high speed all the time
Keep the computer clean. You can buy compressed air and use it on the computer motherboard from time to time. Remove, clean, and fix back Random Access Memory sticks (RAM). Always clean the inside of your computer after removing its power sources. That includes batteries if you are using a mobile device. More tips here on how to physically clean up your Windows computer, mouse & keyboard.
Let us know if you have any other ideas!
Read next: How to fix Overheating and Noisy Laptop Fan issues.
