Mini ATX, FlexATX and Extended ATX (see PC motherboards). THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

There are four motherboard sizes available in 2025 from major manufacturers such as Asus, Gigabyte, and MSI, among others.

Essential tips for buying a case: how to avoid common mistakes, what to look out for, and how to find the right PC case.

The Asus ROG Strix X870-I Gaming Wi-Fi is no exception, building on the drool-worthy ROG Strix X670E-I Gaming Wi-Fi and going ...

As can be evidenced from the motherboard size chart above, there's quite a dramatic difference in scale between Mini-ITX and MicroATX, with more of a subtle difference when comparing ATX and EATX ...