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Advanced Technology eXtended (ATX)

pc

ATX is a motherboard and power supply specification standard for personal computers.

expanded

Developed by Intel in 1995, the ATX standard specifies the configuration and size of motherboards and power supplies to ensure compatibility among components in personal computers. ATX provides specifications for power connections, I/O ports, and mounting points, which help manufacturers produce interchangeable components and support ease of upgrade and building of PCs.

examples

ATX motherboards typically measure 305 mm x 244 mm (12 in x 9.6 in) and are equipped with multiple PCIe slots for expansion cards.

ATX motherboards are commonly used in mid-tower and full-tower desktop cases due to their size and expandability features.

An ATX power supply delivers +12V, +5V, and +3.3V DC outputs, typically supporting a power range from 300 watts (W) to 1000 watts (W) and beyond.

ATX power supplies are used in desktop computers to provide necessary power to motherboard components and peripheral devices.

related terms

Micro ATX (mATX)
Micro ATX is a motherboard form factor measuring 244 mm x 244 mm (9.6 x 9.6 inches).
Information Technology eXtended (ITX)
ITX is a motherboard form factor with a small size designed for compact PC builds.
Mini-ITX (ITX)
Mini-ITX is a compact motherboard standard measuring 170 mm × 170 mm (6.7 in × 6.7 in).
Serial Advanced Technology Attachment (SATA)
SATA is a computer bus interface used for connecting host bus adapters to mass storage devices like hard drives and optical drives.
Slot
A slot is a connector on a motherboard used for installing and holding add-in cards.