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

2.3 Connector placement

All connector locations as well as allowable placement area for I/O connectors on the

back panel are described and can be found in the microATX interface specification.

2.4 Height Constraints

2.4.1 Primary (Component) Side Height Constraints

One major advantages of the Mini-ITX form factor is its backward-compatibility with

the ATX specification. The Mini-ITX motherboard can be installed in any ATX chassis.

Figure 4 shows the required maximum component height constraints for the

components on the PC board. For full compliance with Mini-ITX, and to prevent

interference with the chassis structure, power supply, or peripherals, the motherboard

components should not exceed the height limit in each zone defined. Similarly,

compliant power supplies, peripherals, and chassis features should not extend into the

motherboard component area.

Figure 4. Mini-ITX Maximum Component Height Restrictions