How-to Guides                                                   

Case fans play a critical role in keeping your PC running cool and stable. When they malfunction—whether it’s strange noises, erratic spinning, or not spinning at all—it can lead to overheating, performance drops, or even hardware failure.

In this guide, we’ll walk you through common case fan problems and how to fix them step by step, ensuring your system runs smoothly and quietly.

If the fan still doesn’t spin, the fan itself may be defective and should be replaced.

2. The Fan Is Noisy or Makes Strange Sounds

3. The Fan’s RGB Lighting Isn’t Working

Keep in mind that fans often spin slowly at low system temperatures—that’s completely normal for smart fan profiles.

If the fan still spins abnormally, the fan itself may be defective and should be replaced.

A malfunctioning case fan doesn’t just make noise—it can compromise your whole system’s cooling efficiency. Thankfully, most fan issues are easy to identify and fix with a little inspection and testing.

To prevent problems down the line, invest in quality fans, clean them regularly, and keep your wiring neat and secure.

PC case fans aren’t built to last forever.

 Over time, wear and tear from dust, heat, and mechanical stress will eventually take a toll. Even the best-quality fans have a lifespan, so if one stops working after years of use, it’s not unusual—it’s just time for a replacement.

Looking for reliable, high-performance case fans? Explore the full lineup of darkFlash fans—built for silent operation, vibrant RGB lighting, and long-lasting durability.





Case fans play a critical role in keeping your PC running cool and stable. When they malfunction—whether it’s strange noises, erratic spinning, or not spinning at all—it can lead to overheating, performance drops, or even hardware failure.



In this guide, we’ll walk you through common case fan problems and how to fix them step by step, ensuring your system runs smoothly and quietly.







Common Reasons for PC fans not spinning





Dust buildup: Over time, dust and debris can accumulate on fan blades and bearings, leading to reduced performance or complete failure.



Power issues: Loose cables, faulty connections, or inadequate power supply can prevent fans from operating properly.



Physical Interference: Inadequate cable management might cause the fan blades hitting the cables and lead to slow downs or immobilization.



Faulty motors: Fan motors can degrade with use, eventually failing to spin at all.



BIOS misconfiguration: Incorrect settings in the BIOS may disable the fan or restrict its speed.



Software issues: Malfunctions in fan control software can cause the fan to behave erratically or stop working.



Identifying and Resolving Fan Issues

1. The Fan Isn’t Spinning





⚠️ Common Causes:





Insufficient power due to daisy-chain wiring



Improper cable splicing or loose connections



Malfunctioning fan hub or controller



Fan blades hitting loose cables

👉 How to Fix:





Power down your PC and unplug it from the wall



Open your case and check the fan connections—ensure the fan cable is securely plugged into the correct motherboard header or fan hub.



Try connecting the 4-pin fan directly to another motherboard header to isolate the issue.



You can also test the fan individually by unplugging it from the hub or series connection and powering it separately.

If the fan still doesn’t spin, the fan itself may be defective and should be replaced.



2. The Fan Is Noisy or Makes Strange Sounds





⚠️ Common Causes:





Dust buildup in the bearings or blades



Fan blades hitting loose cables



Vibration-induced resonance between the fan and case

👉 How to Fix:





Turn off your PC and inspect the fan closely.



Clean the blades and bearings using compressed air, a soft brush or alcohol wipes to remove any dust.



Ensure no cables are interfering with the blades.



Check for any physical damage like bent blades or worn mounts.



Test the fan in another system or on an open bench to rule out case vibration as the cause.



If the fan still makes strange noises, the fan itself may be defective and should be replaced



3. The Fan’s RGB Lighting Isn’t Working





⚠️ Common Causes:





Outdated or missing RGB firmware/software



Inadequate power supply



Improper RGB header connection

👉 How to Fix:





Connect the fan’s RGB (3-pin or proprietary) cable to a different RGB header on your motherboard or controller.



Ensure your motherboard lighting software is installed and updated (e.g., ASUS Aura Sync, MSI Center, GIGABYTE RGB Fusion).



If the issue persists, consider using a powered RGB hub to supply sufficient power to the lighting.



As a last check, test the fan’s lighting functionality outside your current build to confirm if it’s a hardware issue.



4. The Fan Spins Too Slowly





⚠️ Common Causes:





Fan speed settings configured to low via BIOS or software



Fan blades hitting loose cables causing slow downs



Internal temperature not high enough to trigger higher fan speed

👉 How to Fix:





Check if the cable is interfering with the fan blades.



Boot into BIOS or open your motherboard’s fan control software.



Adjust the fan curve to increase speeds earlier or set a custom performance profile.

Keep in mind that fans often spin slowly at low system temperatures—that’s completely normal for smart fan profiles.

If the fan still spins abnormally, the fan itself may be defective and should be replaced.



Final Thoughts

A malfunctioning case fan doesn’t just make noise—it can compromise your whole system’s cooling efficiency. Thankfully, most fan issues are easy to identify and fix with a little inspection and testing.





(Gauss G24 ARGB Fan)



To prevent problems down the line, invest in quality fans, clean them regularly, and keep your wiring neat and secure.



It’s also important to remember: PC case fans aren’t built to last forever. Over time, wear and tear from dust, heat, and mechanical stress will eventually take a toll. Even the best-quality fans have a lifespan, so if one stops working after years of use, it’s not unusual—it’s just time for a replacement.



Looking for reliable, high-performance case fans? Explore the full lineup of darkFlash fans—built for silent operation, vibrant RGB lighting, and long-lasting durability.





(INF34 ARGB Cooling Fan)

The go-to guide for identifying and resolving common fan issues with ease

How to Troubleshoot PC Case Fan Issues Like a Pro

Hardware Tips                                                   

Ever notice your PC slowing down when things get hot?

Your game suddenly drops frames, video exports take longer, and your fans sound like a jet engine, yet performance keeps dropping. This isn’t just your PC “getting old”—it’s your system protecting itself from

 heat damage, limiting performance to survive.

Your CPU and GPU generate heat as they work. Normally, your cooling system keeps things in check, but if temperatures climb too high—typically above 90°C—your system will automatically lower its operating speeds to reduce heat.

, a built-in safety feature that prevents permanent damage by sacrificing performance to lower temperatures.

In other words: Your PC slows down to protect itself.

If your environment is warm, or your PC frequently handles heavy tasks like rendering, gaming, or simulations, these slowdowns can happen often.

The Best Fan Installation Direction for Your PC Case

While thermal throttling protects your PC, it can interrupt your workflow and reduce productivity. Here’s how you can help your PC stay cool:

As a hardware brand, we see it all the time: creators, gamers, and engineers invest in high-performance PCs but still face slowdowns under heat. It’s often not the processor or GPU that’s the problem—it’s insufficient thermal management.

By ensuring your system stays cool, you allow your CPU and GPU to maintain high clock speeds without triggering thermal throttling. This means:

If you’re planning to build or upgrade your PC for heavy workloads, 

thermal design should be at the top of your checklist.

High temperatures trigger thermal throttling, which reduces your PC’s performance to prevent damage. While this keeps your hardware safe, it can interrupt your productivity and gaming experience.

By improving airflow, maintaining a clean system, and considering advanced cooling when building your setup, you can keep your PC cool and fast—even during demanding tasks.

If you’re looking to optimize your workstation for stable performance under heavy loads, or need guidance on cooling solutions that match your workflow, feel free to reach out. We’re here to help you keep your PC performing at its best—no matter how hot it gets.





Ever notice your PC slowing down when things get hot?

Your game suddenly drops frames, video exports take longer, and your fans sound like a jet engine, yet performance keeps dropping. This isn’t just your PC “getting old”—it’s your system protecting itself from heat damage, limiting performance to survive.







Why Does Heat Slow Down Your PC?

Your CPU and GPU generate heat as they work. Normally, your cooling system keeps things in check, but if temperatures climb too high—typically above 90°C—your system will automatically lower its operating speeds to reduce heat.

This is known as thermal throttling, a built-in safety feature that prevents permanent damage by sacrificing performance to lower temperatures.

In other words: Your PC slows down to protect itself.



How Overheating Impacts Performance

When your PC overheats, you may notice:





Games drop in frame rates during intense moments.



Video rendering and exporting slow down.



Fans ramp up, becoming loud, but temperatures remain high.



The PC’s outer casing feels warm or hot.



The system feels sluggish, especially during demanding workloads.

If your environment is warm, or your PC frequently handles heavy tasks like rendering, gaming, or simulations, these slowdowns can happen often.





(The Best Fan Installation Direction for Your PC Case)



How to Prevent Heat-Related Slowdowns

While thermal throttling protects your PC, it can interrupt your workflow and reduce productivity. Here’s how you can help your PC stay cool:





Keep your workspace well-ventilated and ensure airflow around your system.



Regularly clean out dust from fans and heatsinks to maintain clear airflow.



Avoid blocking air vents with cables or clutter near your PC.



Consider using high-quality thermal paste to improve heat transfer.



If you run demanding workloads regularly, consider investing in advanced cooling solutions or a system designed for sustained performance.





(DP7 Thermal Paste)



Why Thermal Management Matters

As a hardware brand, we see it all the time: creators, gamers, and engineers invest in high-performance PCs but still face slowdowns under heat. It’s often not the processor or GPU that’s the problem—it’s insufficient thermal management.

By ensuring your system stays cool, you allow your CPU and GPU to maintain high clock speeds without triggering thermal throttling. This means:





Consistent frame rates in games



Faster render and simulation times



Quieter operation under load



Longer hardware lifespan

If you’re planning to build or upgrade your PC for heavy workloads, thermal design should be at the top of your checklist.





(DN360S Liquid CPU Cooler)



Key Takeaway

High temperatures trigger thermal throttling, which reduces your PC’s performance to prevent damage. While this keeps your hardware safe, it can interrupt your productivity and gaming experience.

By improving airflow, maintaining a clean system, and considering advanced cooling when building your setup, you can keep your PC cool and fast—even during demanding tasks.



If you’re looking to optimize your workstation for stable performance under heavy loads, or need guidance on cooling solutions that match your workflow, feel free to reach out. We’re here to help you keep your PC performing at its best—no matter how hot it gets.





Understanding Thermal Throttling and How It Affects Performance.

Why Does My PC Slow Down When It Gets Hot?

When it comes to building a PC, planning is everything. Whether you're a first-time builder or a seasoned enthusiast, visualizing your setup ahead of time helps avoid compatibility issues and makes the whole process smoother and more cost-effective.

That’s why we are excited to introduce you to 

 — an incredibly useful online tool that lets you create and preview your custom PC builds in real time. Even better? Many of our darkFlash cases and cooling products are available on the platform, so you can see exactly how your setup will look before you make a purchase!

 is a browser-based PC builder that focuses on 

. You can select your components — from the CPU and GPU to the case, fans, and power supply — and the site will automatically check compatibility between parts. 

 apart is its stunning 3D rendering: it allows you to see how everything fits together, down to cable clearance, airflow direction, and lighting layout.

Pick your Case, CPU, motherboard, GPU, RAM, and other components step by step. If you already have some parts in mind, you can load them directly.

3. Select Your Case (Example: darkFlash DY470)

 — this is required before adding any components. You can browse the list 

 in the search bar to begin building with that case.

💡 Note: Make sure to choose products labeled with “3D” to enable 3D preview features.

After clicking on a component, you’ll see its 

 — making it easy to learn more or buy directly from online stores.

Once you’ve selected all your components, you can preview the full build in 3D. Use your mouse to rotate and view from different angles. You can also use the controls below the preview window to adjust RGB lighting effects in real time.

Happy with your setup? Save it for later or share it with friends or on forums. It’s a great way to get feedback or make sure everything’s ready before you hit “buy.”

Before You Buy, Try It Out on Buildcores!

 before making any final purchases. It’s the perfect way to visualize your setup and make sure everything works — and looks — just the way you want it.

If a product isn’t available for direct purchase, feel free to contact a local dealer in your region for assistance. We hope this tool makes your PC building experience smoother and more enjoyable!

PC building is about more than just hardware — it’s about creating something uniquely yours. Let 





When it comes to building a PC, planning is everything. Whether you're a first-time builder or a seasoned enthusiast, visualizing your setup ahead of time helps avoid compatibility issues and makes the whole process smoother and more cost-effective.

That’s why we are excited to introduce you to Buildcores — an incredibly useful online tool that lets you create and preview your custom PC builds in real time. Even better? Many of our darkFlash cases and cooling products are available on the platform, so you can see exactly how your setup will look before you make a purchase!



What is Buildcores?





Buildcores is a browser-based PC builder that focuses on visualizing your build in 3D. You can select your components — from the CPU and GPU to the case, fans, and power supply — and the site will automatically check compatibility between parts. 

What sets Buildcores apart is its stunning 3D rendering: it allows you to see how everything fits together, down to cable clearance, airflow direction, and lighting layout.



How to Use Buildcores

1. Visit the Buildcores Website

Head to https://buildcores.com and click on “Start Building” to begin.







2. Choose Your Components

Pick your Case, CPU, motherboard, GPU, RAM, and other components step by step. If you already have some parts in mind, you can load them directly.







3. Select Your Case (Example: darkFlash DY470)

Start by selecting your PC case — this is required before adding any components. You can browse the list use the filters on the left, or search for a specific model. For example, type “darkFlash DY470” in the search bar to begin building with that case.

💡 Note: Make sure to choose products labeled with “3D” to enable 3D preview features.









4. View Specs and Buy Links

After clicking on a component, you’ll see its detailed specifications along with purchase links — making it easy to learn more or buy directly from online stores.







5. Preview Your Build in 3D

Once you’ve selected all your components, you can preview the full build in 3D. Use your mouse to rotate and view from different angles. You can also use the controls below the preview window to adjust RGB lighting effects in real time.









6. Save or Share Your Build

Happy with your setup? Save it for later or share it with friends or on forums. It’s a great way to get feedback or make sure everything’s ready before you hit “buy.”



Before You Buy, Try It Out on Buildcores!





We recommend exploring your build on Buildcores before making any final purchases. It’s the perfect way to visualize your setup and make sure everything works — and looks — just the way you want it.

If a product isn’t available for direct purchase, feel free to contact a local dealer in your region for assistance. We hope this tool makes your PC building experience smoother and more enjoyable!

PC building is about more than just hardware — it’s about creating something uniquely yours. Let Buildcores and darkFlash help you bring that vision to life!

Get a realistic view of your build, check compatibility, and plan with confidence.

Visualize Your PC Build in 3D — No More Guesswork

As an enthusiast of games and computer DIY in this age, we, darkFlash, feel proud and grateful for keep thinking how to develop impressive and extraordinary products with high-end facilities by assembling and using the PC cases, CPU coolers, case fans, and even gaming chairs and tables in person.

Our goal is to create products that could extremely exert its effect by every user.