How To Test RGB Fans Without Motherboard

RGB fans are the latest trend in computer hardware. They have a fan blade with different colors, which your motherboard can control.

However, sometimes the motherboard is not well-equipped to handle RGB fans. Here is a list of 5 ways to test and troubleshoot RGB fans without your motherboard:

How To Test Your RGB Fans Without Motherboard

Testing the fans on your motherboard can be a hassle if you don’t have a motherboard tester or an external tool.

You can use an app or tool like SpeedFan to test your fans, but these methods are not always reliable. This guide will show you how to test your RGB fans without a motherboard tester easily.

Connect your fan leads to the appropriate pins on the CPU fan header or any other fan headers that support 3-pin fans. Ensure all the pins are connected, and the power is connected to your motherboard.

Next, open SpeedFan and click on the “Color Profile” tab. Select the “3-pin color-coded” profile and make sure that “Onboard LED control (3-pin)” is checked. Hit OK to save the profile and start testing! 

When testing a 3-pin fan, SpeedFan will display its RPMs in blue, while the onboard LED will turn green when it’s working properly.

If one of your fans isn’t spinning at its full speed or has issues, it will display red in SpeedFan, and the onboard LED will turn off. If you’re testing a 4-pin fan, simply replace the 3-pin connector with a 4-pin connector and follow steps 2 – 5, as above.

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Why You Want To Test RGB Fans Without Motherboard

Testing RGB fans without a motherboard can save you time and hassle. RGB fans are often labeled with their color channel, but not all fans have the same colors in each channel. Test each fan individually to ensure they’re spinning correctly and at the correct speed.

RGB fans don’t always work with motherboard control software, so use an external tool like SpeedFan or CPU-Z to monitor fan speeds. Adjusting fan speeds can help improve airflow and reduce noise levels.

 What to Consider When Choosing RGB Fans

RGB fans are a great way to add extra color and style to your computer case or gaming PC. However, before you purchase one, it’s important to understand what to look for.

First, ensure the fan is compatible with your motherboard’s RGB feature. Some RGB fans have additional pins that need to be connected to your motherboard to function properly.

Second, consider the size of the fan. Most RGB fans come in small, medium, and large sizes. Finally, consider the price and quality of the fan. A high-quality fan will usually cost more than a lower-quality fan, but it will also last longer and provide better performance.

What to do if your RGB Fans don’t work

If you’re experiencing trouble with your RGB fans not working, there are a few things you can do to troubleshoot the issue. First, check to see if the LED on your motherboard is blinking. If it’s not, then your fans may not be spinning fast enough to generate enough airflow.

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Next, try increasing the speed of your fan by adjusting its spin frequency using a software tool like SpeedFan. Finally, if all of these solutions fail, it may be necessary to replace your fans altogether.

Troubleshooting RGB Fans

There are a few things you can do to troubleshoot RGB fans without a motherboard:

  1. Check the power supply. Make sure the RGB fan is getting enough power from the power supply. If it’s not, check to see if there’s an adapter available that will provide more power.
  2. Check for loose cables or connectors. Sometimes things can get loose over time and cause issues with fans working properly. Try tightening any connectors or cables that seem to be loose.
  3. Check for corrosion on the motherboard or fan connector pins. If corrosion is present, it can interfere with proper connectivity between the fan and motherboard. Try cleaning the pins with a q-tip and alcohol or using an electrostatic discharge (ESD) protection device such as an ESD wrist strap.
  4. Try moving the fan around. Sometimes one side of the fan will work better than the other. If this is the case, try moving the fan around to see if it fixes the issue.

Benefits of  RGB Fans Without Motherboard

RGB fans can be controlled without a motherboard if the fan supports the controller. This means that you can control the speed and color of your fans without having to remove your system from its case or a computer interface.

Many popular PC builders now include fan controllers with their builds, making it easy to test and adjust your RGB settings. Here are some of the benefits of using a fan controller: 

  1. You can save time by controlling your fans without separating your system.
  2. You can customize your RGB lighting scheme in minutes rather than hours or days.
  3. You can increase airflow and improve cooling performance in dense builds or high-performance systems.
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Frequently Asked Questions

What are RGB fans, and why would I want them?

RGB (Red, Green, Blue) fans are gaining in popularity because they can provide different light colors to simulate various weather conditions. For example, red light can simulate sunrise or sunset, green light can simulate a forest environment, and blue light can simulate the ocean or sky. This allows you to create a customized lighting experience for your computer. 

How do I test RGB fans without a motherboard?

You can test RGB fans by connecting the fan cable to each connector on the fan and then testing the LEDs. If you have an ATX motherboard, you will need to open the case and remove the motherboard to access the connectors. Some motherboards have dedicated headers for RGB LED lighting; others require that you use 3-pin Molex connectors.


RGB fans are becoming increasingly popular, but many people still don’t know how to test them. In this article, I have shown you how to test an RGB fan without using a motherboard.

Following these simple steps, you can identify if the fan is functioning properly and whether it needs replacement.

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Matt Wilson
By Matt Wilson

Matt Wilson is a PC gaming and hardware expert with years of experience. He's a trusted tech product reviewer for gamers and tech enthusiasts.

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