Of course, the ATX motherboard ... won't fit in anything smaller. Mini-ITX cases are designed specifically for mini-ITX motherboards. Adding any upgrades to the components in a mini-ITX case ...

can fit into an ATX case, but the reverse is not true. This flexibility makes mATX and mini-ITX boards versatile for future upgrades or changes in case size. Choosing the right motherboard size ...

While most cases that fit ATX boards have a similar tower design, mATX cases boast ... for one of the ATX motherboard variants. Which one you choose will depend on your case choice, desired ...