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

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1.1 Terminology
Term Description
SFF (Small form factor) 8-19 liter chassis (IDC* definition)
Ultra SFF (uSFF) 4-8 liter chassis (IDC* definition)
Tiny PC Less than 4 liter chassis (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. The 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.
1.4 Benefits to Manufacturers
By manufacturing to this Mini-ITX specification, motherboard manufacturers and
chassis manufacturers can guarantee a better compatibility between their products.
They can also capitalize on the benefits of a reduction in total system costs because of
a reduced system size. This specification allows chassis vendors to design their
product targeting the soldered down, low power processors all the way up to high
performance, multi-core processors. It eliminates the need for them to design
targeted chassis for each platform.
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