Modular vs Non-Modular PSU

When it comes to building a PC, one of the most critical components to consider is the power supply unit (PSU). The PSU is responsible for providing stable and reliable power to all the computer’s components, ensuring smooth operation and optimal performance. Among the various PSU options available, two common choices are Modular and Non-Modular PSUs.

In this article, we’ll explore the differences between these two types of PSUs, their advantages and drawbacks, and help you decide which one is best suited for your PC build.

What Is a Modular PSU?

A Modular PSU, also known as a Fully Modular PSU, is a type of power supply unit where all the cables are detachable from the main unit. Unlike non-modular PSUs, which come with fixed, permanently attached cables, modular PSUs allow users to connect only the cables they need. This design offers better cable management and reduces clutter inside the PC case.

Advantages of Modular PSU

  1. Customizable Cable Management: With a modular PSU, you can connect only the necessary cables, leaving out any unused ones. This leads to a cleaner and more organized PC build, improving airflow and overall aesthetics.
  2. Easy Upgrades and Maintenance: Swapping cables or upgrading to a different PSU model becomes a breeze with a modular design. You can replace cables or the entire unit without disturbing other components.
  3. Better Airflow and Cooling: Reduced cable clutter allows for better airflow within the PC case, which contributes to improved cooling performance, especially when paired with efficient case fans.
  4. Neat and Professional Look: A modular PSU lends a professional and tidy look to your PC build, making it an attractive choice for those who take pride in their setups.
See also  What is A Semi Modular PSU?

Drawbacks of Modular PSU

  1. Higher Cost: Modular PSUs generally come at a slightly higher price point compared to their non-modular counterparts due to the added convenience and features.
  2. Risk of Misplacement: Since the cables are detachable, there’s a slight risk of misplacing them when not in use. However, most manufacturers include cable bags or compartments to address this concern.

What Is a Non-Modular PSU?

A Non-Modular PSU, also known as a Fixed Cable PSU, comes with all its cables permanently attached to the main unit. Unlike modular PSUs, you cannot remove or replace any of the cables, leading to less flexibility in cable management.

Advantages of Non-Modular PSU

  1. Lower Cost: Non-modular PSUs are generally more affordable than their modular counterparts, making them an attractive option for budget-conscious builders.
  2. No Misplacement Concerns: With all the cables fixed, there’s no risk of misplacing any cables when they are not in use.
  3. Easy Installation: Since all the cables are pre-attached, there’s no need to worry about connecting the right cables to the right ports during installation.

Drawbacks of Non-Modular PSU

  1. Cable Clutter: The fixed cables can lead to cable clutter inside the PC case, obstructing airflow and potentially affecting cooling performance.
  2. Limited Customization: You cannot remove or replace any cables, limiting your ability to manage cables and potentially hindering the aesthetics of your build.
  3. Difficult Upgrades: Upgrading to a different PSU or replacing a faulty cable may require more effort and may necessitate rearranging other components.

Which One Should You Choose?

The choice between a Modular and Non-Modular PSU largely depends on your individual preferences, budget, and the complexity of your PC build.

See also  Best Thermal Pad for M.2 SSD

Choose a Modular PSU if:

  • You prioritize clean cable management and improved airflow.
  • You plan to upgrade your PC frequently or use custom cables.
  • You want a professional and tidy look for your PC build.

Choose a Non-Modular PSU if:

  • You are on a tight budget and looking for a cost-effective PSU option.
  • You do not mind some cable clutter and do not plan on frequent upgrades.
  • You prefer a hassle-free installation process.

Building a PC with a Modular PSU

Step-by-Step Guide

  1. Choose the Right PSU: Select a modular PSU with the appropriate wattage for your PC build. Ensure it has the necessary connectors for your components.
  2. Unbox and Inspect: Carefully unbox the PSU and inspect all the included cables and accessories.
  3. Mount the PSU: Place the PSU in the designated PSU chamber at the bottom of the PC case and secure it with screws.
  4. Connect the Necessary Cables: Identify the required cables for your components and connect them to the PSU. Avoid over-connecting unnecessary cables.
  5. Route Cables Neatly: Use cable ties and cable management features in the case to route the cables neatly along designated pathways.
  6. Test and Verify: Before powering on the PC, double-check all cable connections to ensure everything is secure and properly connected.

Building a PC with a Non-Modular PSU

Step-by-Step Guide

  1. Choose the Right PSU: Pick a non-modular PSU with the appropriate wattage for your PC build. Make sure it has all the necessary connectors.
  2. Unbox and Inspect: Unbox the PSU and ensure all the fixed cables are present and in good condition.
  3. Mount the PSU: Place the PSU in the PSU chamber and secure it in place with screws.
  4. Manage Excess Cables: As non-modular PSUs come with fixed cables, you may have excess cables not needed for your build. Carefully bundle and tuck them away to minimize clutter.
  5. Organize Cables: Use cable ties and management clips to organize the cables neatly inside the case.
  6. Verify Connections: Double-check all connections before powering on the PC to ensure everything is properly connected.
See also  Best PSU for GeForce RTX 4070 Ti

Tips for PSU Cable Management

  1. Plan Ahead: Before starting your PC build, plan how you want to route and manage the cables for an organized setup.
  2. Use Cable Ties: Cable ties are your best friend for securing cables together and keeping them tidy.
  3. Utilize Cable Management Features: Many modern PC cases come with dedicated cable management features, such as rubber grommets and cable channels. Utilize these to your advantage.
  4. Velcro Straps: Consider using velcro straps for easy cable adjustments during the build.
  5. Don’t Overstuff: Avoid overstuffing cables in tight spaces, as it can hinder airflow and cooling.


In conclusion, both Modular and Non-Modular PSUs have their unique advantages and drawbacks. If you value cable management, easy upgrades, and a clean PC build, a Modular PSU might be the right choice for you. On the other hand, if you prioritize cost-effectiveness and a straightforward installation process, a Non-Modular PSU could be a suitable option.

When selecting a PSU, consider the power requirements of your components, the size of your PC case, and your long-term build plans. Investing in a high-quality PSU, regardless of its modularity, is crucial for the stability and longevity of your PC. Always opt for reputable brands and models with sufficient wattage to meet your system’s needs.

Ultimately, making an informed decision between Modular and Non-Modular PSUs will ensure a successful and enjoyable PC building experience, tailored to your specific requirements and preferences.

en_USEnglish (United States)
Scroll to Top