Measuring in at 305 x 244 mm (12 x 9.6 inches), this size of motherboard has plenty of room for four or more RAM slots, multiple PCIe cards at several lengths, and two to four M.2 slots.

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.

Motherboard Sizes: Understanding E-ATX, ATX, mATX, and mini-ITX. When building a PC, choosing the right motherboard size is crucial for ensuring compatibility, upgradability, and performance.

What is and what does a motherboard do? The primary component of a computer is the motherboard (sometimes called the mainboard). The motherboard is the hub that is used to connect all of the ...

The most important thing about an ATX motherboard is its size. ATX boards measure 305 by 244 millimeters, and PC parts and case sizes have largely standardized around them.

With motherboard sizes influencing the overall esthetics and expansion options of a PC, choosing the best parts for a proper gaming rig that is perfectly sized yet powerful is crucial. Ad.

Motherboard form factors are easily identified by their physical dimensions. An ATX motherboard size is 12 inches by 9.6 inches. An Extended ATX (EATX) measures 12 inches by 13 inches.

Small motherboards are unique—because they allow you to do any size build that you wish. Some enclosures can be as small as a standard console such as the Sony PS5, but pack a tremendous amount ...