Board types compared by size
Board Form Factors, for application selection by foot-print
Board formats in order of Square Area below; or by alphabetic order
Embedded MotherBoards, or Stand-Alone Embedded SBCs.
The card formats are ordered by area; just length multiplied by width.
| ESMexpress: | 3125mm2, | 125mm x 25mm | |
| Mobile-ITX: | 3600mm2, | 60mm x 60mm | |
| ESMini: | 5225mm2, | 95mm x 55mm | |
| DIMM-PC: | 6800mm2, | 68mm x 100mm | [DIMM Memory Card Size] |
| Pico-ITX: | 7200mm2, | 72mm x 100mm | |
| PC-104: | 8640mm2, | 90mm x 96mm | [PC/104-Plus, and PCI-104] |
| PCI-104: | 8640mm2, | 90mm x 96mm | [No ISA bus adopts PCI bus] |
| STX: | 8640mm2, | 90mm x 96mm | |
| E2Brain: | 8625mm2, | 75mm x 115mm | [Embedded Electronic Brain] |
| microETXexpress: | 9025mm2, | 95mm x 95mm | |
| ETX: | 10830mm2, | 114mm x 95mm | [SOM-ETX] |
| ETXexpress: | 10830mm2, | 114mm x 95mm | |
| COM-ETX: | 11020mm2, | 116mm x 95mm | |
| COM-Express: | 11875mm2, | 125mm x 95mm | |
| COM-144: | 11400mm2, | 114mm x 100mm | [DIMM Memory format] |
| AMC: | 13320mm2, | 72mm x 185mm, | Mezzanine CCA format |
| Nano-ITX: | 14400mm2, | 120mm x 120mm | |
| ESB 3.5: | 14709mm2, | 101.6mm x 144.78mm | 4 x 5.7 inch [W x L] |
| JREX: | 14994mm2, | 102mm x 147mm | 3.5" inch [W x L] |
| ECX: | 15330mm2, | 105mm x 146mm | Intel open standard SFF, 2005 |
| EPIC: | 18975mm2, | 115mm x 165mm | |
| PISA: | 19375mm2, | 155mm x 125mm | [Legacy bus interfaces] |
| Em-ITX: | 20400mm2, | 170mm x 120mm | |
| ESB 5.25: | 29419mm2, | 203.2mm x 144.78mm | 8 x 5.7 inch [W x L] |
| EBX: | 29638mm2, | 146mm x 203mm | |
| ePCI-X: | 29638mm2, | 146mm x 203mm | [Embedded PCI eXtended] |
| Mini-ITX: | 28900mm2, | 170mm x 170mm | |
| PICMG 1.0: | 41297mm2, | 338.5mm x 122mm | |
| EmbATX: | 59457mm2, | 243.84mm x 243.84mm | [EmbeddedATX] |
| ATX: | 74420mm2, | 305mm x 244mm | [Standard PC motherboard] |
Use the alphabetic list of COTS Cards to see the complete list of card types. The listing above only supports cards that do not require a backplane.
Equipment Chassis Manufacturers [Any card format]
Standard/Embedded MotherBoard Form Factors [Board sizes and Socket types]
BackPlane Manufacturers
The board sizes listed above are approximate, review the standards to obtain the correct board size. The card sizes listed in square millimeters from smallest to largest. The standard dimensions are Length by Width, and include connectors extending past the card edge. These board formats may be used as a Stand-alone computer, or may require a backplane or mother board. Pages point to manufacturers, interface bus descriptions and board sizes.
The entries with no link either do not provide a board description or a listing of manufacturers. In many cases a board description my be included on another similar listing and differ only in board size.
Marketing terms, or terms that already describe a board specification are not listed. So some terms used by a few manufacturers which describe their individual product that are already defined by a board format specification may not be listed. This applies to company branding of a product line, which would confuse the difference between two product lines.
