There are four motherboard sizes available in 2025 from major manufacturers such as Asus, Gigabyte, and MSI, among others. These are Mini-ITX, MicroATX, ATX, and E-ATX. As the naming conventions ...

Choosing a PC case is an extremely important matter, as practice shows that it will survive more than one upgrade of your ...

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

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 ...