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

2.1 Board dimensions

Table 2. Compares ATX, microATX, and Mini-ITX board dimensions

Dimension ATX microATX Mini-ITX

Maximum width Allowable 305mm 244mm 170mm

Maximum depth Allowable 244mm 244mm 170mm

2.2 Mounting Hole Placement

Mini-ITX utilizes a subset of ATX mounting holes. To avoid damage to traces on

motherboards, chassis standoffs in any locations not specified should be removable or

not implemented at all. See Figure 2 for relative hole location compared to ATX and

microATX motherboards.

Figure 2. ATX, microATX, and Mini-ITX Mounting Holes

NOTE: Board is shown oriented with the rear of the board towards the top.

NOTE: The lighter portion indicates the approximate region of the Mini-ITX form factor.