How to Connect Extra Fans to Your PC

PC manufacturers have stalled on ensuring the proper and safe connectivity of PC fans to computers, which can be a problem for some users. While ensuring proper connection of fans to computers is not a complicated process, it is important to consider how the fans will be used, as you don’t want a noisy PC that is causing unnecessary noise in your home. While you may not be sure what fans are connected to your computer, you can check out this guide to see if you have fans that need to be connected to your computer.

PC towers are limited to a certain number of fans to cool the components, but if you need more in your system, there’s no reason why you can’t just add on a couple of extra fans or a fan controller to your computer. For less than $40, you can add up to 8 fans to your computer, and if you need to cool more than one PC, you can expand your fan count to 12, 16, or even 24 fans.

If you’re upgrading or building a new computer, adding an extra fan to help keep it cool or even a few extra fans for better air circulation is a great way to keep your computer humming along. However, it’s not as easy as it should be to get these fans connected.. Read more about pc fan splitter and let us know what you think.

We’ll go over everything you need to know about adding additional fans to your computer. Not only do different computer fans have different connection types, but how you connect them is also crucial.

Adding additional fans to most computer cases nowadays is simple enough for most people to accomplish. You won’t have to worry about your computer overheating since most cases include plenty of fan mount places.

We go through how to set up the airflow and air pressure type in our other post on PC airflow optimization. Before adding additional fans, it’s a good idea to comprehend this initial stage.

Adding fans that are installed incorrectly or positioned in the wrong location of the computer casing may hinder from your system’s overall cooling strategy.

This may result in worse cooling than before you added the additional fan(s), and I’m sure that wasn’t the intention of anybody installing more fans.

Important: Before attaching or disconnecting any fans, ensure sure your computer is switched off and not connected to electricity.

Now that that’s out of the way, let’s look at how you can add additional fans to your computer.

Selecting the Correct Fan

There are a few things to consider if you don’t have your fans yet and still need to buy some.

  1. Select the appropriate size for the space available in your case.
  2. Cheap fans may not survive as long as more expensive fans and may make more noise. So aim for something well-known or with a lot of positive feedback.
  3. Fans with just three wires are more difficult to operate than those with four connections.
  4. Larger fans are quieter since they don’t have to spin as quickly to provide enough airflow.
  5. Don’t be afraid to get a little nerdy and compare noise levels in proportion to airflow volume across different models and manufacturers under the specs section.

The Best Unlit 120mm Fan

How to Connect Extra Fans to Your PC

PWM Noctua NF-P12 redux-1700 Noctua NF-P12 redux-1700

This is a fan that will provide a lot of airflow while staying very silent. It’s ideal for any computer, whether it’s for a high-end gaming fanatic or a general-purpose machine. The high-quality bearings will last for many years.

The Best RGB 120mm Fan

How to Connect Extra Fans to Your PC 2

ML120 Pro by Corsair

You may experience awe-inspiring RGB lights, all controlled from the iCUE software, while getting excellent performance and being extremely silent with mag-lev bearings that will never wear out. Don’t forget to buy an RGB controller for it as well.

If you’re looking for a full RGB kit, look no further.

How to Connect Extra Fans to Your PC 3

ML120 Pro 3 Fan Pack with LED Controller by Corsair

Three Corsair ML120 Pro fans are included in this kit, as well as everything you’ll need to get the RGB lights up and running. If you haven’t already, download Corsair’s iCUE program and get ready to customize the lighting for them to your heart’s delight.

Several fan connections

Today, there are a few different kinds of fan connectors. Let’s go through each kind of connection and see how they should be linked based on the connection type.

How can I add more fans to my motherboard?

Number of Pins Name / Function Colors of Common Wire
1 Wire for the Ground (GND) Black
2 (+12V) Positive Power Wire Red or yellow (This one will always be red if the sensor wire (3) is yellow.)
3 Sensor for RPM (Sense) Green or Yellow
4 PWM (pulse width modulation) control (Control) Blue

Pin-out for the Fan Connector on the Motherboard

3 pin connector for adding an extra fan to pcFan Connector with 3 Pins

4 pin connector for adding an extra fan to pcFan Connector with 4 Pins

Fan connection headers with 3 or 4 pins are found on most motherboards.

A pin for ground power or negative (-), a pin for positive power (+), and a third pin for an RPM (Revolutions Per Minute) sensor make up the three-pin header.

The 4 pin header includes all of the features of the 3 pin connection, plus an extra pin for PWM (Pulse Width Modulation), which allows you to adjust the speed of your fan without using an additional speed control circuit. Using your BIOS or third-party software like SpeedFan, you can simply build fan speed profiles.

When connecting a fan to a motherboard connection, all you have to worry about is making sure it’s plugged in correctly. Typically, a clip on the rear of the pin header connection on the motherboard will fit the connector housing.

Also, double-check that the fan connection is plugged into a fan connector header. The silkscreen print on motherboards typically has the connector’s designation name.

What is the best way to connect a 3 pin fan to a 4 pin Molex connector?

All is OK if your fan only has a 3 pin Molex connection and your motherboard only has a 4 pin Molex connector. Simply line up the fan’s connection housing slot with the shroud clip on the motherboard’s header.

Simply match the color of the wires to the proper pin number given in the pin-out table above if you don’t have the luxury of things being as they should be.

On any circuit board, pin 1 will always be labelled.

What is the best way to connect fans to the power supply?

4 pin power supply connector to add extra fans to pcConnector for a 4-Pin Power Supply

There are two popular methods for connecting fans to a power source directly. Either a normal 4 pin power supply connection or an adapter board that transforms the standard power supply connector to a motherboard style pin header connector.

Make sure the tapered sides of the plug match the socket end if your fan has a conventional 4 pin power supply connection. Before trying to connect the plug and socket into each other, be sure the plug and socket are oriented properly.

Check that the power supply connector is correctly attached to the PCB adapter if you have a PCB that your power supply connects to first.

How to Connect Extra Fans to Your PC 4Adapter Board for Fan Pin Header Power Supply

Then, similarly to a motherboard connector, plug your fan connector into the pin header connection on the PCB adapter.

Make that the plug groove on the fan is aligned with the pin header clip.

Using fan controllers that aren’t built-in

Adding a separate fan controller system is a more appealing alternative for certain enthusiasts. Many models enable you to regulate each fan individually, which may save you a lot of time when attempting to build up a fan speed curve profile.

In this instance, follow the fan controller system’s instructions for installing it into your computer’s chassis. For easy control and programming, some of them include a touchscreen module that installs in a drive bay.

Your fans will then be connected to the fan controller unit, which will supply the required power, collect speed measurements, and regulate the fans according to the controller system’s requirements.

Before turning on the computer, double-check all connections.

Never presume that anything was correctly plugged in the first time. Return to the beginning and double-check that all of the plugs are properly inserted and connected to the right pins. When working on your computer, never hurry and always move slowly and cautiously.


Finally, double-check that the fan blades aren’t being obstructed by cables, connections, or other objects in the computer’s casing.

To reduce the chance of anything blocking your fan blades, I’ve found that putting some inexpensive metal finger guards to the inside side of the fans is a good alternative.

Also, when feasible, install filters to reduce the quantity of dust that is drawn into your system.

This is an easy one – it’s a guide on how to connect extra fans to your PC. This is particularly useful if you’re running a gaming PC that needs to cool down as it’s running and you don’t have enough airflow.. Read more about how to connect case fans to power supply and let us know what you think.

Related Tags

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