三针风扇接法

Once you have the opportunity to start looking inside multiple computer cases, you may notice that some CPU cooling fans have an extra wire compared to others. What is the difference between three and four wire fans? Today’s SuperUser Q&A post has the answer to a curious reader’s question.

一旦有机会开始查看多个计算机机箱，您可能会发现某些CPU冷却风扇的电线比其他风扇多。 三线风扇和四线风扇有什么区别？ 今天的“超级用户问答”帖子回答了一个好奇的读者的问题。

Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-driven grouping of Q&A web sites.

今天的“问答”环节由SuperUser提供，它是Stack Exchange的一个分支，该社区是由社区驱动的Q＆A网站分组。

问题 (The Question)

SuperUser reader RockPaperLizard wants to know what the difference is between three and four wire CPU fans:

超级用户阅读器RockPaperLizard想知道三到四线CPU风扇之间的区别是什么：

What is the difference between three and four wire CPU cooling fans (besides the obvious answer of one wire)?

三线和四线CPU散热风扇有什么区别(除了明显的一线答案外)？

What is the difference between three and four wire CPU fans?

三线和四线CPU风扇有什么区别？

答案 (The Answer)

SuperUser contributor Homey_D_Clown_IT has the answer for us:

超级用户贡献者Homey_D_Clown_IT为我们提供了答案：

Basic Differences

基本差异

A three pin connector is basically power (5/12 volt), ground, and signal. The signal wire measures how fast the fan is moving without any controls for the fan’s speed. With this type, fan speed is typically controlled by increasing or decreasing the voltage over the power wire.

三针连接器基本上是电源(5/12伏)，地和信号。 信号线可测量风扇移动的速度，而无需控制风扇的速度。 对于这种类型，通常通过增加或减少电源线上的电压来控制风扇速度。

A four pin connector is a little different than the three pin connector since it has the extra (fourth) wire used for controlling and sending signals to the fan, which likely has a chip on it that tells it to slow down or speed up (in addition to the other wires the three pin connector has).

四针连接器与三针连接器稍有不同，因为它具有用于控制风扇并向风扇发送信号的额外(第四根)电线，风扇上可能有芯片指示其减速或加速(在除了其他电线外，三针接头也有)。

Three Wire and Four Wire Fan Connectors

三线和四线风扇连接器

Chassis and processor fans use either a three wire or four wire connector. The three wire connectors are for small chassis fans with lower power consumption. The four wire connectors are for processor fans with higher power consumption.

机箱和处理器风扇使用三线或四线连接器。 三线连接器用于功耗较低的小型机箱风扇。 四线连接器用于功耗更高的处理器风扇。

A three wire fan connecting to a four pin fan header:

三线风扇连接到四针风扇接头连接器：

Note: When connecting a three wire fan to a four pin fan header, the fan is always on; there is no fan control.

注意：将三线风扇连接到四针风扇接头连接器时，风扇始终处于打开状态； 没有风扇控制。

A four wire fan connecting to a four pin fan header:

连接到四针风扇接头连接器的四线风扇：

A four wire fan connecting to a three pin fan header:

连接到三针风扇接头连接器的四线风扇：

Source: Three Wire and Four Wire Fan Connectors [Intel]

来源： 三线和四线风扇连接器 [Intel]

Have something to add to the explanation? Sound off in the comments. Want to read more answers from other tech-savvy Stack Exchange users? Check out the full discussion thread here.

有什么补充说明吗？ 在评论中听起来不错。 是否想从其他精通Stack Exchange的用户那里获得更多答案？ 在此处查看完整的讨论线程 。

Image Credit: machu (Flickr)

图片来源： machu(Flickr)

翻译自: https://www.howtogeek.com/273575/what-is-the-difference-between-three-and-four-pin-cpu-fans/

三针风扇接法