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ATX Motherboard


ATX was developed as an evolution of the Baby-AT form factor and was defined to address ease of use, support for current and future I/O, support for current and future processor technology, and reduced total system cost.

  • ATX Specification v2.2 Revision 2.2 - [432 KB] Key changes for the ATX Specification Version 2.2 include Main Power Connector changed from 20 pin to 24 pin ( 2 x12) to support PCI-Express* requirements and removed Aux Power Connector Recommendation if using a power supply designed using ATX12V Power Supply Design Guide Rev 2.0 or greater. Also updated the +3.3 V tolerance.

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