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microATX Motherboard Interface Specification
Version 1.2

microATX Motherboard Interface Specification Version 1.2

IMPORTANT INFORMATION AND DISCLAIMERS

1. INTEL CORPORATION MAKES NO WARRANTIES WITH REGARD TO THIS SPECIFICATION (“SPECIFICATION”), AND IN PARTICULAR DOES NOT WARRANT OR REPRESENT THAT THIS SPECIFICATION OR ANY PRODUCTS MADE IN CONFORMANCE WITH IT WILL WORK IN THE INTENDEDMANNER. NOR DOES INTEL ASSUME RESPONSIBILITY FOR ANY ERRORS THAT THE SPECIFICATION MAY CONTAIN OR HAVE ANY LIABILITIES OR OBLIGATIONS FOR DAMAGES INCLUDING, BUT NOT LIMITED TO, SPECIAL, INCIDENTAL, INDIRECT, PUNITIVE, OR CONSEQUENTIAL DAMAGES WHETHER ARISING FROM OR IN CONNECTION WITH THE USE OF THIS SPECIFICATION IN ANY WAY. 2. NO REPRESENTATIONS OR WARRANTIES ARE MADE THAT ANY PRODUCT BASED INWHOLE OR IN PART ON THE ABOVE SPECIFICATION WILL BE FREE FROM DEFECTS OR SAFE FOR USE FOR ITS INTENDED PURPOSE. ANY PERSON MAKING, USING OR SELLING SUCH PRODUCT DOES SO AT HIS OR HER OWN RISK. 3. THE USER OF THIS SPECIFICATION HEREBY EXPRESSLY ACKNOWLEDGES THAT THE SPECIFICATION IS PROVIDED AS IS, AND THAT INTEL CORPORATION MAKES NO REPRESENTATIONS, EXTENDS NO WARRANTIES OF ANY KIND, EITHER EXPRESSOR IMPLIED, ORAL OR WRITTEN, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR WARRANTY OR REPRESENTATION THAT THE SPECIFICATION OR ANY PRODUCT OR TECHNOLOGY UTILIZING THE SPECIFICATION OR ANY SUBSET OF THE SPECIFICATION WILL BE FREE FROM ANY CLAIMS OF INFRINGEMENT OF ANY INTELLECTUAL PROPERTY, INCLUDING PATENTS, COPYRIGHT AND TRADE SECRETS NOR DOES INTEL ASSUMEANY OTHER RESPONSIBILITIES WHATSOEVER WITH RESPECT TO THE SPECIFICATION OR SUCH PRODUCTS. 4. A NON-EXCLUSIVE COPYRIGHT LICENSE IS HEREBY GRANTED TO COPY AND REPRODUCE THIS SPECIFICATION FOR ANY PURPOSE PROVIDED THIS “IMPORTANT INFORMATION AND DISCLAIMERS” SECTION (PARAGRAPHS 1-4) IS PROVIDED IN WHOLE. NO OTHER LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY OTHER INTELLECTUAL PROPERTYRIGHTS IS GRANTED HEREIN.
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Copyright  2003 - 2004 Intel Corporation

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microATX Motherboard Interface Specification Version 1.2

Revision History
Changes from Version 1.1 to Version 1.2 Global — Replaced ATX2.01 with ATX 2.1, where appropriate and removed SFX in SFX/SFX12V Power Supply Design Guide. Important Information and Disclaimers updated. Section 2.3.7 and Section3.1 Main Power Connector changed from 20 pin to 24 pin (2 x 12) to support PCIExpress* requirements. Changes from Version 1.0 to Version 1.1 Global—Removed references to AT, Baby AT, and Mini-ATX. Section 1—Revised introductoryparagraph, updated the specification Web site URL, and changed ATX 2.01 to ATX 2.1 in Table 1. Section 1.1—Updated Web site URL and list of related documents. Section 1.2—Revised Figure 1. Section 2.3.4—Replaced Figure 4. Updated the text in the paragraph immediately preceding Figure 5: corrected the dimensions of the hatched area in Figure 5. Replaced Figure 6. Section 2.4—Moved text in Section 2.4under a new subheading, 2.4.1. Added subheading, 2.4.2, to specify secondary side height constraints. Revised Figure 7 to reflect an increase in the maximum component height restriction. Zones C, D, and E formerly specified three different height restrictions. This revision replaces those three zones (C, D, and E) with one maximum component height restriction zone (C) for the entire region. Section3—Removed discrepancies between this document and the SFX12V Power Supply Design Guide. Section 3.2—Added new section titled “2x2 Connector” to describe a new +12V power connector. Renumbered subsequent sections. Global—Replaced ATX 2.01 with ATX 2.1, where appropriate. Replaced SFX with SFX12V (SMALL FORM FACTOR), where appropriate.

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microATX Motherboard Interface Specification...