How to Power 120Mm Fan

There are a few different ways that you can go about powering a 120mm fan. The most common way is to simply plug it into an outlet, but there are other options as well. If you’re looking for a more permanent solution, you can hardwire the fan directly to your electrical system.

This guide will show you how to do both.

  • Find an AC to DC adapter that can handle at least 12V and 2A
  • Strip the end of the adapter’s positive wire, and twist it around the positive lead on the fan
  • Do the same for the negative wires
  • Plug in the adapter and make sure that the fan is spinning properly

How to Power Pc Fans Externally

Are you looking for a way to power your PC fans externally? If so, you’ve come to the right place! In this blog post, we’ll show you how to do just that.

First, let’s talk about why you might want to power your PC fans externally. There are a few reasons for this: 1. You may have a fan that is not compatible with your motherboard’s fan header.

This is often the case with high-end CPU coolers or aftermarket GPU coolers. 2. You may want more control over your fan speeds than what is possible with your motherboard’s fan headers. For example, you may want to be able to run your fans at lower speeds when they’re not needed (to save on noise and power), and then ramp them up when things start to heat up.

3. You may simply prefer the look of an external fan setup over internal ones! This is especially true if you have a clear side panel on your case – it can really show off those shiny new fans! Whatever your reason for wanting to power your PC fans externally, it’s actually quite easy to do.

All you need is a 12V DC power supply (often referred to as a “12V rail”) and some male-to-male 4-pin connectors (or 3-pin if that’s all your particular fan uses). Assuming you already have a 12V DC power supply, let’s move on to connecting the fans themselves. The first step is finding out which connector type(s) your particular fan(s) use – 4-pin or 3-pin?

Many newer fans will use 4-pin connectors, but there are still plenty of older 3-pin models out there too. Once you know which connector type(s) you need, simply connect eachfan directly to one of the available outputs on the 12V rail using male-to-male connectors (make sure they’re properly locked in place!). That’s all there is too it – now all of your fans will be powered by the 12V rail instead of by your motherboard!

How Do You Wire a 120Mm Fan?

Assuming you would like a blog post discussing how to wire a 120mm computer fan: Most modern computers have at least one 120mm fan for cooling, and some have several. Even if your computer only has one fan, it’s important to know how to correctly wire it up.

If you don’t, you could end up causing damage to your computer or even starting a fire. So let’s go over the proper way to wire a 120mm fan. First, you’ll need to gather the following supplies:

-120mm computer fan -Fan controller (if applicable) -12V DC power supply

-Wire strippers -Electrical tape -Screwdriver (if attaching directly to case)

Once you have all of your supplies, the first step is to identify which wires on the fan are positive and negative. Usually, there will be two black wires and two red wires. The black wires are negative and the red wires are positive.

However, it’s always best to check with a multimeter just to be sure before proceeding. Once you’ve confirmed which wires are which, use your wire strippers to strip about 1/2 inch of insulation off of each end of each wire. Next, take your 12V DC power supply and connect the positive lead (usually red) to one of the positive wires on the fan, then do the same with the negative lead (usually black) and one of the negative wires on the fan.

If everything is hooked up correctly at this point, your fan should start spinning. If not, double check your connections and make sure that they’re tight – loose connections can cause problems like sparking or fires. Finally, if desired or necessary, attach your fan controller in between the power supply andfan using either screws or electrical tape depending on what type of controller you have. That’s all there is too it! Now you know howto properly wire a 120mm computer cooling fan!

How Do I Directly Power My Pc Fan?

One of the most common questions we get asked here at PC FanHQ is how to directly power a PC fan. There are a few different ways to do this, and which method you use will depend on what type of fan you have and what type of power supply you have available. Let’s take a look at the three most common methods:

Method 1: Use a 3-pin to 4-pin Adapter If you have a standard 3-pin PC fan, one of the easiest ways to directly power it is to use a 3-pin to 4-pin adapter. You can pick up one of these adapters for relatively cheap at any computer store or online retailer.

Once you have your adapter, simply plug it into an available 4-pin connector on your power supply unit (PSU). Then just plug your fan into the other end of the adapter and you’re all set! Method 2: Use a Y Splitter Cable

Another easy way to directly power a PC fan is to use a Y splitter cable. These cables are readily available at any computer store or online retailer, and they’re not too expensive either. To use one of these cables, simply plug it into an available 4-pin connector on your PSU.

Then connect your fan to one of the female connectors on the cable using a standard 4-pin Molex connector. That’s all there is to it! Method 3: Use Individual Wires

If you’re feeling adventurous, another option is to directly wire your fan using individual wires. This method requires some basic soldering skills, but it’s not too difficult if you’ve never soldered before. Just follow our handy guide and you should be able to do it with no problems!

How Much Power Does a 120Mm Fan Take?

When it comes to the power consumption of a 120mm fan, it really depends on the specific model and make of the fan. Some 120mm fans can consume as little as 2 watts of power, while others may consume up to 10 watts. So, there is quite a range in terms of how much power these fans can take.

In general though, most 120mm fans will fall somewhere in the middle of that range and consume around 5 watts of power.

How Do I Power All My Case Fans?

One of the most important aspects of a successful gaming PC is cooling. Most gamers understand the need for good case fans and take the time to select quality components. But how do you go about powering all those case fans?

It’s actually not as difficult as you might think. The first step is to identify how many fans you have and what kind of connectors they use. The vast majority of case fans use either 3-pin or 4-pin connectors.

Once you know that, you can determine how many watts each fan uses and calculate the total wattage required for all your fans. Next, you’ll need to find a power supply that can provide enough power for all your needs. If you’re not sure what size power supply you need, there are plenty of online calculators that can help.

Just be sure to factor in the number of case fans when making your calculations. Finally, once you have a power supply with the correct wattage rating, it’s simply a matter of connecting all your case fans to it. Each fan will typically have its own connector on the power supply, so just match them up and plug them in.

That’s all there is to it!


A 120mm fan is a computer cooling device that helps to regulate the temperature of your computer by drawing air into the case and circulating it around. Fan speeds are measured in Revolutions Per Minute (RPM) and the higher the RPM, the faster the fan will spin. Most 120mm fans have a speed of around 1,500 RPM, but some can go as high as 2,000 RPM.

There are two main types of 120mm fans: those with three pins and those with four pins. Three-pin fans are connected to a motherboard header and controlled via software, while four-pin fans are connected directly to a power supply and can be controlled manually.

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