pc case sizes

PC Case sizes explained: What form factor suits your next build?

Find the best PC case size for your chosen build and wave goodbye to any compatibility woes

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Table of Contents

Selecting the best PC case can be intimidating at first, there are tonnes of different options available to you, from large, EATX towers to compact mini-ITX marvels, PC cases come in a variety of sizes, each with its own set of advantages and limitations. Further down, we’ll break down the different PC case sizes, to help you understand their dimensions, compatibility, and suitability for your next build. Whether you’re building a sleek gaming PC or a space-saving workstation, understanding PC case sizes is the first step toward creating your dream setup.

For anyone new to PC building, a standard Mid-tower is the best place to start. These have spacious interiors, sometimes with excellent out of the box airflow and performance, and offer the best value.

Case sizes:SFFMini-Tower (mATX)Mid-TowerFull Tower
Compatible MotherboardMini-ITXMicro-ATX / Mini-ITXATX / Micro-ATX / Mini-ITXE-ATX / ATX / Micro-ATX / Mini-ITX
5.25” Bays11 to 22 to 53 to 6
3.5” Bays1 to 34 to 66 to 86 to 13
2.5” Bays0 to 40 to 40 to 100 to 11
Case Fans1 to 32 to 43 to 95 to 10

Mini ITX Case: SFF

Cooler Master MasterBox NR200P Mini-ITX case

The first, and smallest case on our list, the Mini ITX case is perfect for compact PC builds, prioritizing space-saving without compromising on performance. Designed to accommodate Mini ITX motherboards, these cases are the smallest among mainstream case categories, making them ideal for people looking to build ultra-compact systems. Despite their size, Mini ITX cases often boast innovative layouts and clever engineering to maximize component compatibility and airflow.

While Mini ITX builds may require careful planning to ensure proper component fit and cable management, their small footprint makes them perfect for users seeking a sleek and minimalist PC setup without sacrificing power.

Micro ATX Case: Mini-Tower

ASUS Prime AP201 mATX case

Micro ATX cases, also known as mATX cases, offer a compact form factor that strikes a nice balance between size and functionality. Designed to accommodate Micro ATX motherboards, these cases are smaller than standard ATX cases but still provide more than enough space for powerful components. While they may not offer the expansive room for customization found in larger cases, MicroATX cases are popular choices for budget builds, home theater PCs, and gaming rigs with a focus on not taking up too much space.

Despite their smaller footprint, Micro ATX cases often feature efficient layouts and clever design elements to maximize component compatibility and airflow. With their versatility and space-saving design, Micro ATX cases are ideal for users looking to build a powerful yet compact system without sacrificing performance or features.

ATX Case: Mid-Tower

Corsair 5000D Airflow ATX case

Mid-tower cases are the most popular option for custom builders, with reasonable price to performance. These types of cases are ideal for ATX motherboards but they can also accommodate down to ITX too. offering a versatile and spacious form factor, these are typically very easy to build and upgrade in. These cases provide ample room for high-performance components, extensive cooling solutions, and multiple storage options, making them popular choices for gaming enthusiasts, content creators, and power users alike. With their generous interior space and standardized layout, ATX cases offer easy installation and upgradability, allowing users to customize their systems with ease.

Additionally, ATX cases often feature robust construction, cable management features, and aesthetic enhancements such as tempered glass panels and RGB lighting to showcase your build in style. Whether you’re building a gaming powerhouse or a workstation for productivity, ATX cases provide the flexibility and scalability to meet your needs now and in the future.

EATX Case: Full-Tower

Corsair 7000D Airflow EATX case

EATX cases, cater to people who are looking for the absolute peak of expansion and performance capabilities from a PC case. Designed to accommodate Extended ATX motherboards, these cases offer an expansive interior space that surpasses standard ATX. These large cases provide ample room for multi-GPU configurations, custom water cooling loops, and extensive storage arrays. EATX cases often feature oversized dimensions and robust construction to support the weight and heat output of high-end hardware.

As well as this, they often have multiple expansion slots and mounting points for any accessories you might need, allowing users to create the ultimate powerhouse PC build without compromise. While EATX cases may be larger and pricier than their ATX counterparts, their scalability and flexibility make them the perfect starting point for users who want the absolute best in performance and expandability from their setups.

Alternative Case Form Factors

While ATX, MicroATX, and Mini ITX cases dominate the market, several alternative PC case designs cater to people with niche preferences or looking for unique build requirements. One alternative is the HTPC (Home Theater PC) case, designed to blend seamlessly with home entertainment setups while providing sufficient space for high-performance components.

HTPC cases often feature sleek and minimalist designs, with horizontal form factors. Another alternative is the open-air or test bench case, which breaks traditional enclosure designs in favor of exposed components which makes for easy access and maximum airflow. These cases in particular are popular among hardware enthusiasts and professional system builders who value flexibility and accessibility above all else.

PC Case Size FAQs

Can I fit any motherboard in any PC case?

No, PC cases are designed to accommodate specific motherboard form factors. Make sure to choose a case that supports your motherboard.

Do I need a specific power supply size for my PC case?

PC cases typically support standard ATX power supplies, but some smaller form factor cases may require SFX or SFX-L power supplies. You should check the case specifications to ensure compatibility with your chosen power supply.

In Summary

To summarize, there are many different PC cases perfect for everyone. From smaller cases, like the Micro ITX that are perfect for sitting on the desktop, to the spacious EATX, ideal for people looking to build a custom loop. When it comes to PC cases, if you can imagine it, then you can most likely build it!

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