The Most Popular Motherboard Form Factor, Ranked

Choose the motherboard form factor you think is the most popular!

Author: Gregor Krambs
Updated on Jun 17, 2024 07:04
Choosing the right motherboard form factor is critical for anyone building or upgrading a computer, as it determines not only the size of the board but also its compatibility with other components and the case. It can be challenging for both seasoned builders and newcomers to select the ideal form factor that meets all their needs. By voting for your preferred type, you help create a helpful guide for others. This live ranking aims to simplify the selection process by showing which motherboard form factors are currently the most favored by users like you. Each vote cast contributes to an updated list, reflecting real-time preferences and trends in motherboard design. Your participation ensures that the list stays relevant and useful to everyone involved in building or upgrading PCs.

What Is the Most Popular Motherboard Form Factor?

  1. 1


    Advanced Technology Extended, a motherboard form factor known for its versatility and popularity in both home and office desktop computers.
    • Dimensions: 12 × 9.6 inches (305 × 244 mm)
    • Introduced: 1995
  2. 2


    A form factor similar to Mini-ITX, but slightly larger to accommodate more expansion slots.
    • Dimensions: 8 × 6.7 inches (203 × 170 mm)
    • Introduced: 2007
  3. 3

    MicroATX (uATX)

    A slightly different naming convention for Micro-ATX, emphasizing its compact size.
    • Dimensions: 9.6 × 9.6 inches (244 × 244 mm)
    • Introduced: 1997
  4. 4


    A smaller version of the ATX, designed to be backward compatible but with a reduced physical size.
    • Dimensions: 9.6 × 9.6 inches (244 × 244 mm)
    • Introduced: 1997
  5. 5


    A family of ultra-small form factor motherboards for small, energy-efficient computers.
    • Dimensions: Depends on specific variant (e.g., Mini-ITX, Nano-ITX)
    • Introduced: 2001 for Mini-ITX
  6. 6


    An extended version of the ATX form factor designed for enthusiast and professional-grade hardware setups.
    • Dimensions: Varies, larger than standard ATX
    • Introduced: 2009
  7. 7


    An ultra-small form factor designed for embedded systems, significantly smaller than Mini-ITX.
    • Dimensions: 4.7 × 4.7 inches (120 × 120 mm)
    • Introduced: 2003
  8. 8


    Extended ATX is a larger version of the standard ATX, designed for high-end computer systems with more space for components.
    • Dimensions: 12 × 13 inches (305 × 330 mm)
    • Introduced: Varies, based on ATX specification updates
  9. 9

    Thin Mini-ITX

    A variation of the Mini-ITX form factor, designed for ultra-thin computers.
    • Dimensions: 6.7 × 6.7 inches (170 × 170 mm), but thinner than standard Mini-ITX
    • Introduced: 2011
  10. 10


    A small form factor motherboard designed for compact and small form factor (SFF) computers.
    • Dimensions: 6.7 × 6.7 inches (170 × 170 mm)
    • Introduced: 2001

Missing your favorite motherboard form factor?

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About this ranking

This is a community-based ranking of the most popular motherboard form factor. We do our best to provide fair voting, but it is not intended to be exhaustive. So if you notice something or form factor is missing, feel free to help improve the ranking!


  • 84 votes
  • 10 ranked items

Movers & Shakers

Voting Rules

A participant may cast an up or down vote for each form factor once every 24 hours. The rank of each form factor is then calculated from the weighted sum of all up and down votes.

Additional Information

More about the Most Popular Motherboard Form Factor

Rank #1 for the most popular motherboard form factor: ATX (Source)
The motherboard is the main circuit board in a computer. It holds crucial components and allows them to communicate. The form factor of a motherboard is its size, shape, and layout. It determines the type of case, power supply, and other components that can be used.

Motherboard form factors have evolved over time. The first computers had large, bulky motherboards. As technology advanced, smaller and more efficient designs emerged. Today, there is one form factor that stands out as the most popular.

This form factor is favored for several reasons. First, it strikes a balance between size and functionality. It is not too big, so it fits in many cases. Yet, it is not too small, so it can support a range of components. This makes it ideal for both casual users and enthusiasts.

Second, it supports a wide variety of processors, memory, and expansion cards. This flexibility allows users to customize their systems to meet their needs. Whether building a gaming rig, a workstation, or a home theater PC, this form factor can accommodate it.

Third, it has a well-established standard. This means that components designed for this form factor are widely available. Users do not have to worry about compatibility issues. They can easily find parts that fit and work together.

The layout of this form factor is also user-friendly. It typically includes several slots for memory and expansion cards. The placement of connectors and ports is logical and accessible. This makes building and upgrading a system straightforward.

Cooling is another important aspect. This form factor usually allows for adequate airflow. Cases designed for it often have multiple fan mounts. This helps keep the system cool and stable, even under heavy loads.

Power supply compatibility is also a key factor. This form factor works with many standard power supplies. Users can choose from a range of options to meet their power needs. This ensures that the system runs efficiently and reliably.

The popularity of this form factor is also driven by community support. There are many forums, guides, and resources available. Users can find help and advice from others who use the same form factor. This makes troubleshooting and optimizing the system easier.

Manufacturers also play a role in its popularity. They produce a wide range of motherboards that adhere to this form factor. This competition drives innovation and keeps prices reasonable. Users benefit from better products and more choices.

In conclusion, the most popular motherboard form factor offers a balance of size, flexibility, and compatibility. It supports a range of components and is easy to work with. Its well-established standard and community support make it a top choice for many users. Whether building a new system or upgrading an old one, this form factor provides a solid foundation.

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