Mini-ITX Addendum to the MicroATX Specification

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

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 locations 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.