How To Connect Multiple Fans To The Motherboard?

There are several ways in which you can connect multiple fans to the motherboard.

Not into CPU or computer building? No worries, connecting multiple fans to the motherboard is still super easy and requires no rocket science.

Ways To Connect Multiple Fans

There are multiple ways to connect multiple fans to the motherboard. All you need to do is buy the right cable or connector as per your need and convenience. Here are some of the options down below. All these products can quickly be brought from online stores and at any hardware brick store as well.

1. Using PWM Cable Splitter

PWM is a term most commonly used in fans, lights, and other electronic appliances. A PWM cable splitter has two ends like any cable. A header connects to the motherboard and, from the other end, is split into two ends.

These two ends are meant to be connected to each fan. This means, through this cable you can add two additional fans to your motherboard.

Before buying, look at the amount of current the cable header can transmit. This amount of current should be greater than the sum of current of all fans you are looking to connect.

This is also known as a 3 pin or 4 pin Y splitter cable.

2. Using 3 Pin Fan To 4 Pin Fan Cable Adapter

This case fan cable lets you easily connect a 4 pin fan connector to a 3 pin motherboard header. If you got a 3 pin header slot empty on your motherboard, you could utilize this cable to add multiple fans to the motherboard.

3. Using  SATA Power Adapter Cable

Another way is to buy a SATA PWM power adapter cable. This cable has 15 pin SATA at one end and is split into two or more ends from the other side. These ends have 3 or 4 pin that gets connected to the case fans.

These cables are backward compatible and operate at a standard Molex voltage of 12V. SATA cables are more powerful in generating current. They can be used to power multiple fans at once.

4. USB To PWM 5V Power Adapter Cable

Using a USB to PWM power adapter cable is another way to add multiple fans to a motherboard. This cable has a USB port at one end and the normal PWM 3 or 4 pin case at the other end to which the fan is connected.

However, these cables run on 5V and reduce the 12V fans to their voltage capacity. This allows the fans to run slower and silent. To control your fan, it has a toggle switch to turn the fan on and off. This cable comes without a switch as well.

5. PWM Fan Hub System

If you want to connect more than two or three fans to your motherboard, this fan hub system is the best choice. This internal hub can connect up to 8 different PC fans powered by Molex or SATA power cable.

The case has eight 4 pin cases. It also has a speed detection sensor, so you don’t have to worry about controlling the fan’s speed.

6. PWM Fan Hub Adapter Cable

This is yet another type of PWM hub system that can be used to connect multiple fans. You can connect up to 5 additional fans from a single 4 pin fan header through this hub.

These were some of the cables suitable for connecting multiple fans to a motherboard. However, installing fans in the motherboard goes beyond these cables.

The problems arise when there isn’t enough space on the motherboard to connect the 4 pin headers. That’s when the question rises

Where To Connect Each Fan?

You will find many 4 pin connectors on the motherboard, but not all are suitable for the header. Here are some of the connectors to look for, for connecting fan cable headers:




Look for these three for connecting your PC case fans. What if there are insufficient and no such connectors found on your motherboard?

In such a case, you will have to install a SATA or Molex hub adapter on your motherboard. To provide you with an idea, look for something that looks like:

Fancasee Hub Adapter Connector

This is a hub adapter connector allows you to connect the header of your fan cables to it. It can connect a 15 pin SATA power cable, 4 and 3 pin PWM fan case cable, a PWM fan case cable for CPU and a PWM interface header as well.

In all, these 10 splitters 10-way extension hub not only fits in your case fans but also a CPU fan as well.

How To Control Multiple Fans To The Motherboard?

Should you be able to control the speed of multiple fans on the motherboard or not? If you connect the fans directly to the power supply, they will run at full speed at all times.

However, if you connect the header to the motherboard connectors like SYS_FAN, their speed will be automatically sensed and controlled, maintaining the temperature ideally. This is also considered the best way to connect multiple fans to the motherboard.


1. How many fans can I connect to my motherboard?

You can connect up to 8 fans to the motherboard using an adapter hub brought online.

2. Does fan splitter cable reduce speed?

It depends on the motherboard header. Don’t use too many fans connected to a single header as it can damage the motherboard. Fan splitter cable usually doesn’t reduce speed.

3. Do fans need to be connected to the motherboard?

Yes, modern fans require to be connected to the motherboard through a 3 or 4 pin header, SATA connector, or PWN interface.


To wrap up, you can connect multiple fans to the motherboard using case fan splitter cables, case fan hubs, SATA case fan cable adapter, and other ways.

All these cables have two ends (or split on one side). One end is known as the header that is connected to the motherboard, and the other end is the connector that is connected to the case fan.

Andy Avery

I really enjoy helping people with their tech problems to make life easier, ​and that’s what I’ve been doing professionally for the past decade.

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