You can build a computer with a Mini-ITX motherboard inside an ATX case, but there might be a few drawbacks, including ports ...

This case isn't strictly speaking a Mini-ITX one, but it's a great compact option for bigger builds—even Micro-ATX ones. Unfortunately, however, it's difficult to find in stock anywhere.

Unlike larger motherboards, the Mini-ITX and Micro ATX are both square-shaped, but the Micro ATX is a little larger, offering more connectivity options.

XPG's Invader X Mini delivers great value at $75, packing five 120mm ARGB fans and dual tempered glass panels in a sleek, compact chassis.

When choosing between Mini-ITX and Micro-ATX for building a smaller computer, you are faced with the decision of how much functionality and expandability you want to sacrifice for a compact size.

In size order, from largest to smallest, the motherboard standards are: E-ATX / ATX / M-ATX / Mini-ITX. Providing you get a case that supports the same standard as your motherboard, you're good.

The mini-ITX form factor might be niche, but it can save a lot of real estate on your desk. Here's everything you need to know at mini-ITX.

Best PC case 2025 Find the top PC case for your gaming PC build, with ATX, mATX, and mini-ITX options tested from brands such as Corsair, Fractal, and Hyte.

Micro ATX cases are becoming increasingly popular for gamers who want to build a compact gaming PC.

Support for E-ATX to mini-ITX motherboards means this case is ready for any build, and four 140mm fans help keep things cool.