Motherboard Sizes Explained
Small form factor motherboards, like Mini ITX, typically measure 170mm by 170mm, or 6.7 inches square. These are designed for small, compact cases and have fewer expansion options
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Small form factor motherboards, like Mini ITX, typically measure 170mm by 170mm, or 6.7 inches square. These are designed for small, compact cases and have fewer expansion options
Larger motherboards (like ATX) offer more expansion slots and features but require bigger cases. Smaller motherboards (like Mini-ITX) are great for compact builds but offer fewer
Micro-ATX motherboards, as the name suggests, are smaller than full-size ATX motherboards. They were first introduced in 1997 and, according to Intel, were seen as a natural
Smaller boards like Mini-ITX are good for compact setups like home theater PCs. Form factors also affect performance.
Mini motherboards are the cornerstone of compact computing. By understanding the trade-offs of each form factor, you can build systems that are efficient, reliable, and perfectly suited to your
Mini ITX is the smallest size you''re likely to encounter when building a computer at home.
Compact mini PCs require small motherboards — for example, using the Mini-ITX standard. If you opt for this, you often have to accept some compromises when assembling.
There are four motherboard sizes available in 2026 from major manufacturers such as Asus, Gigabyte, and MSI, among others. These are Mini-ITX, MicroATX, ATX, and E-ATX.
Everything you need to know about motherboard sizes, from size comparisons and charts to every size, including ATX and MicroATX.
Discover the little-known motherboard features that make PC building easier and less frustrating, like tool-less M.2 latches, POST code displays, reinforced PCIe slots, and BIOS flashback.
Small form factor motherboards, like Mini ITX, typically measure 170mm by 170mm, or 6.7 inches square. These are