What is an ATX motherboard?
An ATX motherboard is a standard motherboard form factor that measures 305 x 244 mm and supports full-size components. It was introduced by Intel in 1995 and replaced the older Baby-AT design. ATX boards have a layout that improves airflow and positions components in a way that simplifies assembly and upgrades.
How does ATX differ from Mini-ITX or Micro-ATX?
ATX differs from Mini-ITX and Micro-ATX in size, expansion capacity, and component support. ATX motherboards are larger at 305 × 244 mm, while Micro-ATX measures 244 × 244 mm and Mini-ITX is the smallest at 170 × 170 mm. This size difference affects how many slots, ports, and features each format can integrate.
ATX boards have more room for multiple PCIe slots, additional RAM slots, and advanced cooling solutions, while Mini-ITX boards usually include a single PCIe slot and two RAM slots because of their compact layout.




























