6 inches tall (305 mm x 244 mm), although the standard encompasses a family of related form factors. Variants and Modern Adaptations > As technology advanced, the rigid ATX specification gave way to a spectrum of variants tailored to different market segments.
ATX Standards Dimensions Guide: Understanding Form Factor Variants
Conversely, Extended ATX (E-ATX) expanded the width to 12 inches to accommodate additional memory channels and PCIe lanes for high-end workstations and server motherboards. Conversely, Extended ATX (E-ATX) expanded the width to 12 inches to accommodate additional memory channels and PCIe lanes for high-end workstations and server motherboards.
Introduced by Intel in 1995, this specification addressed the limitations of the earlier AT (Advanced Technology) design, offering a more rational layout for components, improved power delivery, and better case airflow. The ATX standard represents the foundational specification for desktop computer motherboards and power supplies, establishing a universal platform that has defined the PC industry for decades.
ATX Standards Dimensions Guide: Understanding Form Factor Variants
By relocating the power connector to the top of the motherboard and rotating the processor slot, Intel created a design that reduced cable clutter and allowed for more strategic placement of components. This interoperability became the bedrock of the modern personal computing experience, ensuring that a motherboard from one brand could fit seamlessly into a case from another.
More About Atx standards
Looking at Atx standards from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on Atx standards can make the topic easier to follow by connecting earlier points with a few simple takeaways.
