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

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

But for those on a budget, buying a new motherboard is far more cost-effective. The GIGABYTE B550 EAGLE WIFI6 ... 6 includes five fan headers. Modern ATX cases with multiple installed fans can ...