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(hardware, standard)
An open PC motherboard specification by Intel.

ATX is a development of the Baby AT specification with the motherboard rotated 90 degrees in the chassis. The CPU and SIMM sockets have been relocated away from the expansion card slots meaning that all the slots support full-length cards. More I/O functions are integrated on the motherboard. As the longer edge of the board is now at the back of the chassis, there is more space for connectors; also, the I/O opening on the back panel of the chassis has been defined as double the previous height, allowing vendors to add extra on-board I/O functions over and above the standard.

Most Pentium Pro boards use this form factor.

As well as the motherboard size, layout, and placement, the ATX specification also includes requirements for power supply and fan specification and location.

The full size ATX board measures 305mm wide by 244mm deep. There is also a Mini-ATX form factor, 284mm by 208mm.
References in periodicals archive ?
The ATX 2013 Roadshow kicks off November 20th in Brooklyn.
These ambassadors were utilized as a testing group during the development phases for the ATX and new 11B4 blades.
Blue Link combines safety, service and infotainment into a complete package of over 30 different services that ATX integrates into the vehicle to give drivers a simplified user experience designed to minimize the potential for distracted driving.
So far, the annual high of the ATX was some 2,800 points and was achieved in April.
As well as the new Leicester facility, ATX is also planning to open a UK office in London.
Compared to traditional central office switches, the Telica softswitch allows us to significantly reduce our capital and operating expenses, while improving the quality of service our customers experience," states Guy Fardone, senior vice president and general manager at ATX.
ATX is a leading tax software provider based in Caribou, Maine, and Ft.
Raj Desai, IBM director of automotive development, noted ATX addresses these needs of automakers by leveraging IBM's highly scalable and modular software platforms such as WebSphere Separate research by ATX and IBM indicates consumers view IVR and speech response technology as one of the most important features offered by any automaker with in-vehicle information systems.
By 1417 CET Erste Group gave up the ATX lead to oilfield operator Schoeller-Bleckmann AG (WBAG:SBO) and dropped to third place.
The combination of Kleinrock and ATX gives rise to one of America's largest tax information and software companies, Foreman notes.
Business information provider UCG (Rockville, MD) has acquired ATX Forms, Inc.
Force Computers, a Solectron company (NYSE:SLR) has introduced its new line of dual Pentium 4 processor-based ATX form-factor platforms, the Force Embedded Servers, which includes the FES-4201 board.