Mini-ITX Addendum Version 1.1 To the microATX Motherboard Interface Specification Version 1.2

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Contents
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 .............................................................................................................. 7
2.1 Board dimensions ................................................................................... 8
2.2 Mounting Hole Placement ......................................................................... 8
2.3 Connector placement.............................................................................. 10
2.4 Height Constraints ................................................................................. 10
2.4.1 Primary (Component) Side Height Constraints .............................. 10
2.4.2 Secondary (Bottom/Solder) Side Height Constraints ..................... 11
3 Power Supply Information .................................................................................. 12
Figures
Figure 1. Example Mini-ITX Layout ....................................................................... 7
Figure 2. ATX, microATX, and Mini-ITX Mounting Holes .......................................... 8
Figure 3. Mini-ITX Board Diagram ........................................................................ 9
Figure 4. Mini-ITX Maximum Component Height Restrictions .................................. 10
Tables
Table 1. Mini-ITX Addendum Feature Summary ..................................................... 5
Table 2. Compares ATX, microATX, and Mini-ITX board dimensions.......................... 8
Table 3. Motherboard Mounting Hole Locations ...................................................... 9