DTX (form factor)
Physical standard for computer motherboards
title: "DTX (form factor)" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["computer-related-introductions-in-2007", "motherboard-form-factors"] description: "Physical standard for computer motherboards" topic_path: "arts/film" source: "https://en.wikipedia.org/wiki/DTX_(form_factor)" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Physical standard for computer motherboards ::
::figure[src="https://upload.wikimedia.org/wikipedia/commons/a/a0/Comparison_ATX_μATX_DTX_ITX_mini-DTX.svg" caption="Comparison of the form factors for motherboards ATX, μATX (micro-ATX), '''DTX''', mini-ITX and '''mini-DTX'''"] ::
The DTX form factor is a variation of the ATX specification designed especially for small form factor PCs (especially for HTPCs) with dimensions of 8 xx. An industry standard intended to enable interchangeability for systems similar to Shuttle's original "SFF" designs, AMD announced its development on January 10, 2007. AMD stated that the DTX form factor is an open standard, and is backward compatible with ATX form factor cases. It also present a shorter variant named Mini-DTX which is smaller in PCB size of 8 xx.
The specification provides for up to two expansion slots on a DTX motherboard, in the same position as the top two slots on an ATX or microATX board. The spec also provides for optional ExpressCard expansion slots on DTX motherboards.
Comparison
DTX is a shorter version of ATX and micro-ATX, and Mini-DTX is a slightly longer version of Mini-ITX. Mini-ITX can have only one expansion slot, whereas Mini-DTX has the same width and can have two expansion slots.
::data[format=table]
| Specification | Year | Dimensions of motherboard | Expansion slots |
|---|---|---|---|
| ATX | 1995 | 12 xx | 7 |
| microATX | 1997 | 9.6 xx | 4 |
| DTX | 2007 | 8 xx | 2 |
| mini-DTX | 8 xx | ||
| mini-ITX | 2001 | 6.7 xx | 1 |
| :: |
Benefits
There are several benefits DTX provides to reduce production costs:
- A standard PCB manufacturering panel can yield four DTX motherboards, or six Mini-DTX motherboards.
- DTX motherboards can be manufactured in as few as four layers of printed circuit board wiring for motherboard cost savings.
- Backward compatibility with ATX helps to minimize DTX development costs.
References
References
- "ATX Specification Is Inch-Based".
- "DailyTech report".
- "Early SFF Description".
- (January 10, 2007). "AMD Announces Development of DTX Open Standard to Help Enable Broad Adoption of Small Form Factor PCs". AMD.
::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::