Motherboard atx detail

Details of an ATX motherboard, the most widespread standard for desktop computers since the mid-1990s.

About this subject

The ATX form factor was introduced by Intel in 1995 to replace the older AT standard. Its official dimensions are 305 mm by 244 mm, allowing better component organization and internal airflow. The main changes included relocating the processor near the power supply and adopting a 20-pin power connector, later expanded to 24 pins.

A typical ATX motherboard houses the CPU socket, RAM slots (usually DIMM), PCIe expansion slots for graphics cards and other peripherals, plus the chipset that manages communication between components. SATA connectors for storage, USB and audio headers, and the main power connector are common points of detail in such images.

The standard evolved with specifications like ATX12V (adding a 4- or 8-pin CPU power connector) and, more recently, ATX12VO (12V only for the motherboard). Despite competition from smaller formats like microATX and mini-ITX, ATX remains the most versatile and popular form factor for high-performance desktops and home servers. Component placement directly impacts thermal efficiency and expandability, features valued by enthusiasts.

Frequently Asked Questions

What does ATX stand for?

ATX stands for Advanced Technology eXtended, an evolution of the previous AT standard.

What are the dimensions of an ATX motherboard?

An ATX motherboard measures 305 mm in width by 244 mm in depth.

When was the ATX standard introduced?

The ATX standard was introduced by Intel in 1995.