Micro-ATX vs. Mini-ITX: Pros and cons for tiny motherboards

Mini-ITX motherboards, which measure approximately 6.7 x 6.7 inches, are significantly smaller than Micro-ATX models measuring 9.6 x 9.6 inches. This smaller size makes Mini-ITX ideal for tiny computers that are even suitable for travelling, but offer fewer features and limited expansion options compared to Micro-ATX. Mini-ITX usually only has a single PCIe x16 slot, a maximum of two M.2 slots as well as SATA ports, and limited USB ports as well as RAM slots.

Micro-ATX motherboards, on the other hand, are often cheaper and offer better compatibility with other PC components. This makes them a suitable choice for budget configurations. They are a scaled-down version of ATX motherboards that retain key features. Very reduced versions have only two RAM slots.

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In terms of case size, Mini-ITX cases typically range from 5 to 12 liters, while small Micro-ATX cases are around 12 to 30 liters. The choice of case directly influences the expandability and cooling options. Mini-ITX models limit the size of cooling solutions and the number of fans, while Micro-ATX chassis leave more room for better cooling and larger components.

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Tightly packed, powerful components in a small space often lead to a challenge with Mini-ITX, as it’s not always possible to add more fans for cooling. Micro-ATX cases, on the other hand, offer more space for fans and larger radiators.

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            <div class="lightbox-image-container foundry-lightbox"><div class="extendedBlock-wrapper block-coreImage undefined"><figure class="wp-block-image size-full enlarged-image"><img decoding="async" data-wp-bind--src="selectors.core.image.enlargedImgSrc" data-wp-style--object-fit="selectors.core.image.lightboxObjectFit" src="" alt="Micro-ATX-Hauptplatine" class="wp-image-2283859" width="1000" height="1000" loading="lazy" /><figcaption class="wp-element-caption"><p>Micro-ATX motherboards offer slightly more space and therefore more room for additional components. They are usually easier to cool as there is more space for fans.</p>

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In terms of price, Mini-ITX is often more expensive than Micro-ATX. Mini-ITX does not benefit from the same economies of scale as Micro-ATX and ATX, resulting in higher costs for fewer features. Micro-ATX is therefore often cheaper than standard ATX motherboards and offers a good balance between size and features.

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When it comes to portability, Mini-ITX boards allow for smaller PC builds. Only gaming laptops are even easier to transport. With Micro-ATX cases, you don’t have to make any significant compromises in terms of space and portability.

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            <div class="lightbox-image-container foundry-lightbox"><div class="extendedBlock-wrapper block-coreImage undefined"><figure class="wp-block-image size-full enlarged-image"><img decoding="async" data-wp-bind--src="selectors.core.image.enlargedImgSrc" data-wp-style--object-fit="selectors.core.image.lightboxObjectFit" src="" alt="Mini-PC" class="wp-image-2283860" width="1024" height="563" loading="lazy" /><figcaption class="wp-element-caption"><p>Compact mini PCs require small motherboards &mdash; for example, using the Mini-ITX standard. If you opt for this, you often have to accept some compromises when assembling.</p> </figcaption></figure><p class="imageCredit">IDG</p></div>

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The narrow form factor also increases the complexity of assembling Mini-ITX. The particular challenges include, for example, cable management or fitting components. Because there is more space available, Micro-ATX has more room for the hardware to be installed, which makes assembly easier.

Further reading: 6 basic mistakes to avoid when installing a motherboard

Ultimately, the choice of housing should be made before building a PC, with Mini-ITX and Micro-ATX being universal standards. For those users who don’t need an extremely compact computer, Micro-ATX offers more of everything at a potentially lower price.

This article was translated from German to English and originally appeared on pcwelt.de.