有时，当您启动计算机时，您可能会在启动过程中看到CPU 风扇错误。(CPU Fan)来自计算机BIOS的消息表明您的(BIOS)CPU风扇 似乎有问题。
虽然您不必惊慌，但这是您在继续使用计算机之前需要解决的一个重要错误。因此，让我们看看如何修复CPU风扇错误消息。
什么是 CPU 风扇？
CPU(CPUs)或中央处理器(Central Processing)是计算机的“大脑”。CPU是进行数字运算的主要单元，可让您的计算机正常工作。它使用电力来做到这一点，其中一些电力在此过程中转化为热量。
如果CPU过热，其内部的电路将无法正常通电，从而导致计算失败。在极端情况下，CPU会变得非常热，以至于那些精密的电子元件会被破坏。
为了解决这个问题，CPU有一个头部伸展器，它是一块金属板，一侧接触CPU，另一侧暴露在外部世界中。通常由铝和铜制成的散热器放置在散热器上。它们之间(Between)是一层薄薄的导热膏，它填充了两个金属面之间可能存在的任何气隙。
热量(Heat)从CPU移动，通过散热器进入散热器。然后散热器本身需要冷却。这通常通过连接的风扇来完成，该风扇使空气通过散热器的散热片。
为什么会出现 CPU 风扇错误？
有两种情况会导致发生CPU风扇错误。要么你的CPU风扇有问题，要么你的电脑认为有问题。
风扇可能出现问题的一件事是它的运行速度不够快，无法充分冷却CPU。另一个是风扇完全停止了。
如果在强制关机后出现此错误，则可能是硬件的实际问题。如果您的CPU风扇在关机前非常响亮，那是一个不好的迹象。再说一次，您的风扇可能会完全静音，因为它静止不动，这是不正常的。尤其是在负载下！
一些现代主板支持在CPU(CPU)空闲时停止风扇，因为它不会产生热量，但通常风扇应该在旋转。风扇速度错误意味着报告的风扇速度不是计算机所期望的或超出正常范围。
排除 CPU 风扇问题
如果您想知道您的CPU风扇是否真的在旋转，最简单的方法就是简单地查看。我们只建议桌面系统使用此方法，因为除非您已经知道自己在做什么，否则在部分拆卸状态下运行笔记本电脑并不是最好的主意。
如果您有幸拥有一台带有侧窗的台式电脑，您所要做的就是通过它查看风扇是否在旋转。如果您不这样做，通常很容易卸下侧面板并在计算机运行时查看。
使用笔记本电脑，您只需将手放在其中一个排气口前即可。如果您的型号同时带有内部 CPU 和GPU风扇，您可能需要在手册或在线确认哪一侧是CPU风扇通风口。如果你感觉到空气从那个通风口吹出来，这意味着你的风扇至少在旋转。
如果您想尽可能多地了解有关 CPU 风扇的信息，请继续下载SpeedFan。该程序监控计算机上的温度，并允许您调整风扇的速度。它还会告诉您风扇是否在旋转以及当前速度 ( RPM )。
风扇是否连接正确？
这主要适用于新的计算机版本，但您应该检查CPU风扇是否正确连接。CPU风扇接头（主板上与CPU风扇相连的接头）通常在主板上标有“ CPU _FAN”之类的标签，紧挨着CPU插槽。
有时系统构建者会错误地将CPU风扇插入系统风扇接头，从而使CPU风扇接头未使用。这让电脑认为根本没有风扇！
用于水冷系统
如果您的计算机使用一体式水冷(all-in-one water cooler)器，则水泵通常插入系统风扇接头，散热器风扇插入CPU风扇接头。如果这是意外反转并且泵发生故障，您还可能会看到风扇速度错误。
检查 BIOS
CPU风扇错误通常会在启动过程中停止系统，并要求您先进入BIOS。您绝对应该这样做并注意以下几点：
- 在系统监控（或类似）下，检查报告的风扇速度是多少RPM。
- 如果BIOS已重置，请确保默认风扇速度设置或任何风扇速度设置符合CPU冷却器制造商的指示。
- 如果您知道自己在做什么，还可以将BIOS设置为在某些情况下忽略CPU风扇速度。(CPU)仅在有特定原因时才执行此操作，例如风扇速度传感器故障，尽管风扇正常运行。
检查其他风扇
确保(Make)系统中的其他风扇也已连接并正常运行。如果您的情况没有足够的气流，即使运行速度尽可能快， CPU风扇也可能无法提供足够的冷却。(CPU)
确保足够的通风
您还应该确保计算机周围有足够的空间，以便冷空气可以进入并且热空气可以离开。如果将外壳推到墙壁或其他平面上，空气将无处可去。
清洁您的风扇和通风口
空气必须进入和离开外壳的通风口也是如此。确保所有通风口都畅通无阻，并确保风扇本身没有被灰尘和其他可能干扰其运行的材料堵塞。
禁用超频(Overclocking)和自定义风扇曲线(Custom Fan Curves)
如果您要超频 CPU 或设置自定义风扇曲线(custom fan curve)，请删除这些设置并将其恢复为默认设置，看看是否有帮助。超频可能需要升级风扇，而有问题的风扇曲线可能无法在重负载下正确冷却CPU 。
更换 CPU 风扇(Replace Your CPU Fan)（或导热膏(Thermal Paste)）
如果您的 PC 风扇确实卡住了，或者尽管风扇正常旋转，但您的CPU变得太热，您可能需要将其从CPU上取下并进行检查。如果导热膏看起来陈旧、干燥、片状和破裂，请用异丙醇将其清洗干净，然后在CPU散热器中间重新涂抹豌豆大小的液滴，然后再更换散热器。
如果风扇本身真的死了，您也许可以只更换风扇。但是，您更有可能需要更换整个冷却器。如果您仍在使用台式机CPU随附的(CPU)CPU散热器，这是购买更好的东西的好借口！
CPU风扇错误有多严重？
最坏的情况是你的风扇没有为你的CPU提供足够的冷却，在这种情况下它一直很热。如果过热，它会自动关闭计算机以防止永久性损坏，但即使在该临界点下长时间运行CPU也会缩短其使用寿命。(CPU)
How to Fix a “CPU Fan Error” Message
Sometimes, when you stаrt up your computer, you may see а CРU Fan errоr appear during thе boot process. A message from your computer BIOS that something seems to be wrong with your CPU fan.
While you don’t have to panic, this is an important error that you need to resolve before you keep using your computer. So let’s see how to fix a CPU fan error message.
What Is a CPU Fan?
CPUs or Central Processing Units are the “brains” of your computer. The CPU is the main unit that does the number crunching that lets your computer work. It uses electricity to do this and some of that electricity is converted into heat in the process.
If the CPU gets too hot, the circuits inside it will no longer carry electricity properly and the calculations will fail. In extreme cases, the CPU can get so hot that those delicate electronic components will be destroyed.
To combat this, the CPU has a head spreader, which is a metal plate that touches the CPU on one side and exposes its other side to the outside world. A heatsink, usually made from aluminum and copper, is placed on the heat spreader. Between them is a thin layer of thermal paste, which fills up any air gaps that might exist between the two metal faces.
Heat moves from the CPU, through the heat spreader into the heatsink. The heatsink itself then needs to be cooled. This is usually done with an attached fan which moves air through the heatsink’s fins.
Why Does the CPU Fan Error Happen?
There are two situations that cause the CPU fan error to happen. Either there’s something wrong with your CPU fan or your computer thinks there is.
One of the things that can go wrong with your fan is that it can’t go fast enough to cool your CPU adequately. Another is that the fan has stopped completely.
If you get this error after a forced shutdown, it’s probably an actual problem with the hardware. If your CPU fan was really loud before a shutdown, that’s a bad sign. Then again, your fan might be completely silent because it’s standing still, which is not normal. Especially when under load!
Some modern motherboards support stopping the fan when the CPU is idle since it isn’t generating heat, but in general the fan should be spinning. A fan speed error means that the reported speed of the fan isn’t what the computer expects or it’s outside of the normal range.
Troubleshoot CPU Fan Issues
If you want to know whether your CPU fan is actually spinning or not, the easiest way is to simply look. We only recommend this for desktop systems, since running your laptop in a partially disassembled state isn’t the best idea unless you already know what you’re doing.
If you’re lucky enough to have a desktop computer with a side window, all you have to do is look through it to see if the fan is spinning. If you don’t, it’s usually very simple to remove the side panel and have a look while the computer is running.
With laptops, you can simply hold your hand in front of one of the exhaust vents. If you have a model with both an internal CPU and GPU fan, you may have to confirm in the manual or online which side is the CPU fan vent. If you feel air blowing out of that vent, it means your fan is at least spinning.
If you want as much information about your CPU fans as possible, go ahead and download SpeedFan. This program monitors temperatures on your computer and allows you to adjust the speed of your fans. It will also tell you if your fans are spinning and the current speed (RPM).
Is the Fan Connected Correctly?
This applies mostly to new computer builds, but you should check whether the CPU fan is correctly connected. The CPU fan header (the connector on the motherboard that the CPU fan connects to) is usually labeled something like “CPU_FAN” on the motherboard and will be right next to the CPU socket.
Sometimes system builders plug the CPU fan into the system fan header by mistake, leaving the CPU fan header unused. This makes the computer think there’s no fan at all!
For Water-cooled Systems
If your computer uses an all-in-one water cooler, then the water pump is usually plugged in to the system fan header and the radiator fan into the CPU fan header. If this were accidentally reversed and the pump were to fail, you could also see a fan speed error.
Check the BIOS
The CPU fan error usually halts the system during the boot up process and asks that you enter the BIOS first. You should definitely do this and look out for a few things:
- Under system monitoring (or similar), check what the reported fan speed is in RPM.
- If the BIOS has been reset, ensure that the default fan speed settings or any fan speed settings comply with your CPU cooler manufacturer’s indications.
- If you know what you’re doing, you can also set the BIOS to ignore CPU fan speed in some cases. Only do this if there’s a specific reason for it, such as a faulty fan speed sensor despite the fan running as it should.
Check the Other Fans
Make sure that the other fans in your system are connected and running properly as well. Without adequate airflow in your case, the CPU fan may not provide enough cooling even if running as fast as it can.
Ensure Adequate Ventilation
You should also ensure that there’s enough room around your computer so that cold air can enter and hot air can leave. If the case is pushed up against a wall or other flat surface the air has nowhere to go.
Clean Your Fans and Vents
The same goes for the vents where air has to enter and exit the case. Make sure all vents are clear and ensure that the fans themselves aren’t clogged with dust and other material which can interfere with their operation.
Disable Overclocking and Custom Fan Curves
If you’re overclocking your CPU or have a custom fan curve set up, remove those settings and take things back to default to see if it helps. Overclocking might require a fan upgrade and a buggy fan curve might not be cooling your CPU properly under heavy load.
Replace Your CPU Fan (or Thermal Paste)
If your PC fan has actually seized up or your CPU gets too hot despite the fan spinning as it should, you may have to take it off the CPU and inspect it. If the thermal paste looks old, dry, flaky and cracked, clean it off with isopropyl alcohol and reapply a pea-sized drop in the middle of the CPU heat spreader, before replacing the heatsink.
If the fan itself is really dead, you might be able to replace just the fan. However it’s more likely that you’ll need to replace the entire cooler. If you’re still using the CPU cooler that your desktop CPU came with, this is a great excuse to buy something a little better!
How Serious Is a CPU Fan Error?
The worst case scenario is that your fan isn’t providing adequate cooling to your CPU, in which case it’s running hot all the time. If it gets too hot, it will automatically turn the computer off to prevent permanent damage, but even running the CPU under that critical point for long periods of time can shorten its lifespan.
