Editing ATX (section)

{{Short description|Motherboard and power supply configuration}}
{{About|the computer form factor}}
{{Main|Motherboard form factor}}
{{Lead too short|date=January 2025}}
[[File:Abit-kt7-large.jpg|thumb|An ATX motherboard]]
[[File:VIA Mini-ITX Form Factor Comparison.jpg|right|thumb|400px|Comparison of some common [[motherboard]] form factors (pen for scale)]]

'''ATX''' ('''Advanced Technology Extended''') is a motherboard and power supply configuration specification, patented by David Dent in 1995 at [[Intel]],<ref>{{cite patent |country=US |number=5555158}}</ref> to improve on previous [[de facto standard|''de facto'' standards]] like the [[AT (form factor)|AT design]].  It was the first major change in [[computer case|desktop computer enclosure]], [[motherboard]] and [[power supply unit (computer)|power supply]] design in many years, improving standardization and interchangeability of parts. The specification defines the dimensions; the mounting points; the I/O panel; and the power and connector interfaces among a [[computer case]], a [[motherboard]], and a [[power supply unit (computer)|power supply]].