How To Connect Pc Fan To Power Supply?

In today’s technology-driven era, a fan is a crucial component that helps to keep our computer systems cool. A computer’s internal components are prone to overheating, which may cause permanent damage to the system. Therefore, you need a cooling system in place to run your PC smoothly. Connecting a fan to a power supply is a fairly simple task, but it can be intimidating for beginners. In this brief guide, we will provide you with all the necessary steps you need to follow to connect your PC fan to a power supply without any complications.

One thing you should keep in mind is that there are different types of fans in the market designed for different purposes. However, they all require a power source to run, and power supplies are the most commonly used sources in computers. Fortunately, there are no significant difficulties in connecting the two since PC cases come with one or more built-in fans, and power supplies have sufficient outputs to power them. In the following paragraphs, we will provide you with more insights on how to connect your PC fan to the power supply easily and safely.

How to Connect PC Fan to Power Supply?

Connecting a PC fan to a power supply involves a few simple steps. Here is a step-by-step guide:

1. First, identify the type of connector on your PC fan. There are two types: 3-pin and 4-pin. The 3-pin connector has three wires, while the 4-pin connector has four.

2. Next, identify the type of connector on your power supply. Most power supplies typically have a 4-pin molex connector.

3. If your PC fan has a 3-pin connector, you will need to use a 3-pin to molex adapter. If your fan has a 4-pin connector, you can use a 4-pin to molex adapter.

4. Connect the adapter to the PC fan by inserting the appropriate connector to the fan’s socket.

5. Connect the other end of the adapter to the power supply by inserting the molex connector to the power supply socket.

6. Finally, turn on your computer to test if the fan is working properly. You should be able to hear the fan running and feel the airflow.

It is important to note that PC fans have a maximum power rating, so be sure to check the power rating on your fan and make sure it does not exceed the rating of your power supply. Also, make sure to secure the fan in place to prevent any accidents or damage.


1. What materials do I need in connecting a PC fan to a power supply?
Answer: You need a PC fan, power supply, wire, and a 12v DC adapter.

2. How do I determine the right voltage of the power supply to use for my PC fan?
Answer: Check the label or manual of your PC fan to see its voltage requirement. You should use a power supply that matches the voltage of your PC fan.

3. Can I connect multiple PC fans to one power supply?
Answer: Yes, you can connect multiple fans to one power supply but ensure that the voltage and amperage wattage are sufficient to power all fans.

4. How do I connect the wires from the PC fan to the power supply?
Answer: Cut the connector off the end of the fan’s wire and strip about 1/2 inch of insulation from each wire. Connect the red wire to the positive (+) terminal and black wire to the negative (-) terminal of the power supply.

5. Is it safe to connect a PC fan directly to a wall socket?
Answer: It is not recommended to connect a PC fan directly to a wall socket. You should always use a power supply to avoid damaging the fan or even causing a fire.


In today’s guide, we have taken a look at the steps needed to connect your PC fan to a power supply. We hope that this step-by-step guide has been helpful and has made the process a bit less intimidating. Remember, having proper cooling for your PC is crucial in ensuring it functions properly and lasts a long time, so make sure to take the necessary steps to keep your system cool. Happy computing!

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