satoruMini-ITX Addendum Version 2.0 To the microATX Motherboard Interface Specification Version 1.2
October 2010
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Contents
Revision History (4)
1Executive Summary (5)
1.1Terminology (6)
1.2Reference Documents (6)
1.3Benefits to Urs (6)
1.4Benefits to Manufacturers (6)
2Layout (8)
2.1Board Dimensions (9)
2.2Mounting Hole Placement (9)
2.3Connector Placement (11)
2.3.1Thin Mini-ITX Back Panel I/O (11)
2.4Height Constraints (11)
2.4.1Mini-ITX: Primary (Component) Side Height Constraints (11)
2.4.2Thin Mini-ITX: Primary (Component) Side Height Constraints (12)
2.4.3Secondary (Bottom/Solder) Side Height Constraints (14)
2.4.4Thin Mini-ITX System Considerations (14)
3Power 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)
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高一语文课程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)
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Table 2. Compares ATX, microATX, and Mini-ITX Board Dimensions (9)
Table 3. Motherboard Mounting Hole Locations (10)
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Revision History
§ 4
1Executive Summary
The Mini-ITX addendum to the microATX Motherboard Interface Specification details
the u the Mini-ITX form factor standard, developed by Via Technologies Inc, for
compatibility with Intel bad platforms. This document defines only the specific
features in Intel’s Mini-ITX bad platforms that differ from tho of microATX and
should be ud in conjunction with the governing microATX specification.
A smaller motherboard layout offers system developers the ability to create new and
innovative system designs. This smaller version of microATX allows and encourages
developers to build within the sub 8 liter chassis volume for a variety of new
applications.
Described within this document are requirements and characteristics of a Mini-ITX
motherboard, so that a motherboard may function and fit appropriately when paired
with a Mini-ITX chassis. Beyond this, it does not detail processor, memory, graphics
or other system features required to meet the Mini-ITX form factor. The items are
left to system designers and integrators within the guidelines of the microATX
specification.
A further refinement of Mini-ITX boards is the Thin Mini-ITX board definition. Its
smaller size enables system integrators to integrate sub-4 liter systems, such as Tiny
PCs and All-In-One PCs, using a standard building block approach.
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Table 1. Mini-ITX Addendum Feature Summary
This addendum does NOT define:
∙Specific power supply form factors
∙Thermal design guidance to chassis vendors (covered in TASC guide listed in Reference Documents)
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