Mini-ITX Addendum to the MicroATX Specification

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Contents
Revision History ..................................................................................................................... 4
1 Executive Summary ........................................................................................... 5
1.1 Terminology ........................................................................................... 6
1.2 Reference Documents .............................................................................. 6
1.3 Benefits to Users .................................................................................... 6
1.4 Benefits to Manufacturers ........................................................................ 6
2 Layout .............................................................................................................. 8
2.1 Board Dimensions ................................................................................... 9
2.2 Mounting Hole Placement ......................................................................... 9
2.3 Connector Placement .............................................................................. 11
2.3.1 Thin Mini-ITX Back Panel I/O ...................................................... 11
2.4 Height Constraints ................................................................................. 11
2.4.1 Mini-ITX: Primary (Component) Side Height Constraints ................ 11
2.4.2 Thin Mini-ITX: Primary (Component) Side Height Constraints ......... 12
2.4.3 Secondary (Bottom/Solder) Side Height Constraints ..................... 14
2.4.4 Thin Mini-ITX System Considerations .......................................... 14
3 Power Supply Information .................................................................................. 16
Figures
Figure 1. Example Mini-ITX Layout for SFF Desktop .............................................. 8
Figure 2. ATX, microATX, and Mini-ITX Mounting Holes.......................................... 9
Figure 3. Mini-ITX Board Diagram ...................................................................... 10
Figure 4. Thin Mini-ITX Back Panel I/O ............................................................... 11
Figure 5. Mini-ITX Maximum Component Height Restrictions ................................. 12
Figure 6. Thin Mini-ITX Maximum Component Height Restrictions .......................... 14
Tables
Table 1. Mini-ITX Addendum Feature Summary .................................................... 5
Table 2. Compares ATX, microATX, and Mini-ITX Board Dimensions ........................ 9
Table 3. Motherboard Mounting Hole Locations .................................................... 10