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Complete Guide To Pc Case Sizes (EATX, ATX, MATX, MITX)

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 Complete Guide To Pc Case Sizes (EATX, ATX, MATX, MITX)

Understanding the different types of PC case sizes is an important step in choosing the right PC case. This guide will cover some of the most common types of PC cases and provide a comparison of importance between each one. Complete Guide To Pc Case Sizes (EATX, ATX, MATX, MITX)

Pros and Cons of Different Case Sizes

When it comes to choosing a PC case, size is an important consideration. Different case sizes offer different advantages and disadvantages, so it’s important to choose the right one for your needs.

In this article, we’ll take a look at the four most common case sizes – EATX, ATX, MATX, and MITX – and explore the pros and cons of each.

EATX cases are the largest of the four sizes, and as such offer plenty of space for high-end hardware. They’re also typically very well-ventilated, which is important for keeping your components cool. On the downside, EATX cases can be expensive, and they’re not always necessary if you don’t plan on using high-end hardware.

ATX cases are a good middle ground between size and price. They offer plenty of space for most builds, while still being relatively affordable. However, they don’t usually offer as much ventilation as EATX cases.

MATX cases are the smallest of the four sizes, which makes them more affordable and easier to transport. However, they don’t offer as much space for expansion, and they often have less vents than larger cases.

MITX cases are even smaller than MATX cases, making them the most compact option available. However, they offer even less space for expansion than MATX cases, so they’


The Extended ATX (EATX) form factor is a variation of the popular ATX motherboard that supports additional expansion cards and taller componentry. The extra space afforded by the EATX standard makes it ideal for gaming and workstation PCs that require more than the usual number of expansion cards.

While most EATX motherboards will fit in a standard ATX case, they may not have enough clearance for all of their componentry. For this reason, many manufacturers offer special EATX cases that have more room for expansion cards and taller coolers.


ATX is the most common form factor for desktop PCs. It was first introduced by Intel in 1995 and has since become the standard size for most desktop computers. An ATX motherboard measures 305mm x 244mm, which is slightly larger than a standard A4 sheet of paper.

The majority of cases on the market are designed to accommodate an ATX motherboard, so you’ll have no shortage of options to choose from if you opt for this form factor. ATX cases come in a variety of shapes and sizes, so you can find one that fits your needs and budget. If you want a case that’s easy to transport, there are plenty of compact ATX cases available. And if you need a case that can accommodate multiple graphics cards or other expansion devices, there are also full-tower ATX cases that offer plenty of room for upgrades.


MATX is the most common motherboard form factor and is used in a wide variety of cases. It offers good compatibility with a wide range of components and cases and is the best choice for most builds.


The MITX form factor is the smallest of the four main PC case sizes. It's designed for mini-ITX motherboards, which are also the smallest available. MITX cases are typically much shorter and narrower than other case sizes, making them more compact overall. This can be a good thing or a bad thing, depending on your needs. If you're looking for a very small PC that can still fit all of your components, then a MITX case is a good option. However, due to their smaller size, they often have less internal space and fewer features than larger cases.

How to choose a PC case

When choosing a PC case, the three main considerations are size, form factor, and cooling.

Size is the most crucial factor to consider when choosing a PC case. The three most common sizes are EATX, ATX, and MATX. EATX cases are the largest and can accommodate up to extended ATX motherboards. ATX cases are the next largest and can accommodate up to standard ATX motherboards. MATX cases are the smallest and can only accommodate up to microATX or mini-ITX motherboards.

The form factor is another important consideration when choosing a PC case. The three most common form factors are the tower, desktop, and HTPC (home theater PC). Tower cases are tall and typically have more drive bays than other form factors. Desktop cases are shorter and typically have fewer drive bays than tower cases. HTPC cases are designed to be placed on top of a desk or entertainment center and often have front-facing ports for easy access.

The final consideration when choosing a PC case is cooling. The three most common cooling methods are air, water, and passive (no fans). Air cooling uses one or more fans to circulate air through the case. Water cooling uses a water pump and radiator(s) to circulate water through the case. Passive cooling relies on good airflow through the case to keep components cool.

Choosing the right PC case depends on your needs and preferences. If you need

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