Mini-ITX Addendum to the MicroATX Specification

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The Mini-ITX Addendum To the microATX Motherboard Interface Specification is a
public document intended for widespread application in many types of systems. It is
available through a public website located at:
http://www.formfactors.org
1.1 Terminology
Term
Description
Small Form Factor (SFF)
8-19 liter chassis (IDC* definition)
Ultra SFF (uSFF)
4-8 liter chassis (IDC* definition)
Tiny PC
Less than 4 liter chassis (IDC* definition)
All-In-One (AIO) PC
An All-In-One is a desktop PC with a display built into the main
computing unit (IDC* definition)
1.2 Reference Documents
The following reference documents are posted on the public web site at:
http://www.formfactors.org
Document
microATX Motherboard Interface Specification Version 1.2
SFX 12V Power Supply Design Guide
TFX 12V Power Supply Design Guide
Thermally Advantaged Small Chassis or TASC [pronounced ‘task’] (Thermal Design Guide)
1.3 Benefits to Users
Trends in the industry indicate that users require a smaller and lower cost solution for
their PC needs. Mini-ITX’s smaller board size and lower height keep-out zones enable
a reduced sized chassis as it sits on the user’s desk, is mounted on a display, or
comes in any other innovative form factor. These changes also enable a PC to be
designed into various aesthetic shapes and sizes. The Thin Mini-ITX board variation
leverages Mini-ITX’s advantages, while enabling even thinner systems.
1.4 Benefits to Manufacturers
By manufacturing to the standard or thin variations of the Mini-ITX specification,
motherboard manufacturers and chassis manufacturers can guarantee a better