Distinguishing EATX, ATX, Micro ATX, and Mini ITX

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Ngày cập nhật gần nhất: 15/4/2026

When purchasing a new computer or individual components, you might find yourself puzzled by specifications like ATX or Micro ATX. The question arises: What do these specifications mean, and how can you distinguish between EATX, ATX, Micro ATX, and Mini ITX?

Differentiating EATX, ATX, Micro ATX, and Mini ITX is crucial for buyers entering the realm of new computers. What do these specifications signify, and how can one differentiate between EATX, ATX, Micro ATX, and Mini ITX?

Understanding the Significance of Specifications

First and foremost, let's talk about the ATX standard motherboard. ATX stands for Advanced Technology eXtended, and this motherboard was developed in 1995. If you're using a regular computer, chances are you're using an ATX motherboard. This makes ATX a 'common' choice when purchasing a new computer or motherboard.

Other motherboards developed from ATX come in larger or smaller sizes. Larger-sized motherboards include EATX (Extended ATX). Micro ATX is a smaller-sized motherboard, followed by Mini ITX ('Information Technology eXtended') which is even smaller than Micro ATX.

Reference: how to check the mainboard to see information from the manufacturer and various indicators of the mainboard.

Differentiating EATX, ATX, Micro ATX, and Mini ITX

The most noticeable aspect for distinguishing EATX, ATX, Micro ATX, and Mini ITX is their size: EATX being the largest, followed by ATX, Micro ATX, and finally, Mini ITX. The question arises, why do motherboards come in different sizes? Pros and cons of each motherboard size.

Case Size

The first reason is that motherboards come in small sizes to fit compact computers. If you observe inside a computer case, you'll notice larger-sized motherboards. However, for smaller computers, it's advisable to use smaller motherboards.

Micro ATX and Mini ITX are the perfect choices for users of small computers. Small computer setups are particularly useful if you want to save space in the room or need portability to different locations. Just keep in mind that components designed for ATX computers may not fit well in small computer cases.

Additionally, cases designed for specific form factors also support smaller motherboards. For instance, ATX cases are often designed to accommodate Micro ATX or Mini ITX motherboards. Make sure to check the manufacturer's specifications before purchasing a computer case with a different size than the motherboard.

Functionality

Smaller motherboards are crafted by removing expansion slots on the old motherboard. The result is a motherboard suitable for smaller computer cases but not allowed upgrades in larger form factors.

Switching from ATX to Micro ATX sacrifices some PCI slots. ATX motherboards come with 6 PCI slots (usually 3 PCI-E x16 and 3 PCI-E x1, but this can vary between models). This means less space for graphics, sound, video, and network cards. Mini ITX motherboards only have 1 PCI-E x16 slot.

Furthermore, the RAM slots will also decrease. The transition from ATX to Micro ATX reduces from 4 slots to 2 slots, although this doesn't always occur. Mini ITX only has 2 RAM slots. USB ports may also be affected by smaller motherboards.

On the contrary, larger EATX motherboards offer more features. At the very least, EATX has 4 PCI-E x16 slots (or potentially more). Generally, if you're seeking a computer with numerous ports and upgrade options, ATX or EATX would be the most fitting choice.

Cost

Cases, computers, and Micro ATX motherboards typically come at the lowest prices. If you're looking for a computer and don't need to worry about upgrades or adding additional hardware, you can save a considerable amount by opting for a smaller motherboard.

Are Smaller Motherboards Slower?

Despite their compact size, the performance of smaller motherboards is on par with larger ones. Certainly, smaller motherboards mean a reduction in PCI-E slots and RAM slots. However, in terms of performance, smaller motherboards are not slower.

There's no denying that the computer form factor is a challenging topic. After distinguishing EATX, ATX, Micro ATX, and Mini ITX, hopefully, you can choose the one that suits you best.

After discerning the sizes of computers and acquiring a new one, you also need to pay attention to the installation steps and use your newly purchased computer to ensure that your device can operate in the best and most efficient environment.

Frequently Asked Questions

What is the difference between ATX and Micro ATX motherboard sizes?

The primary difference between ATX and Micro ATX motherboards is their size. ATX motherboards are larger, typically providing more expansion slots and features, while Micro ATX motherboards are smaller, offering fewer slots but better suitability for compact builds, thus allowing for space-saving setups.

Why should I consider using Mini ITX motherboards for my computer build?

Mini ITX motherboards are ideal for compact computer builds where space is a priority. Despite their smaller size, they deliver performance on par with larger motherboards. However, they have fewer expansion slots, so they're best for users who do not plan to upgrade their hardware frequently.

Are EATX motherboards more expensive than standard ATX motherboards?

Yes, EATX motherboards tend to be more expensive than standard ATX motherboards. This higher cost is due to their larger size and additional features, which often provide more expansion slots and capabilities, making them suitable for high-performance systems.

Can I fit a Micro ATX motherboard into an ATX case?

Yes, you can fit a Micro ATX motherboard into an ATX case. ATX cases are designed to accommodate various motherboard sizes, including Micro ATX and Mini ITX, offering flexibility for users who may want to upgrade their components in the future.

What are the limitations of using Mini ITX motherboards in gaming PCs?

Mini ITX motherboards typically have fewer PCI-E slots and RAM slots compared to larger motherboards, which can limit upgrade potential in gaming PCs. With only one PCI-E x16 slot available, users might find it challenging to install multiple graphics cards or additional hardware components.

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