| Name | PCB size (mm) |
|---|---|
| WTX | 356 × 425 |
| AT | 350 × 305 |
| Baby-AT | 330 × 216 |
| BTX | 325 × 266 |
| ATX | 305 × 244 |
| EATX (Extended) | 305 × 330 |
| LPX | 330 × 229 |
| microBTX | 264 × 267 |
| NLX | 254 × 228 |
| Ultra ATX | 244 × 367 |
| microATX | 244 × 244 |
| DTX | 244 × 203 |
| FlexATX | 229 × 191 |
| Mini-DTX | 203 × 170 |
| EBX | 203 × 146 |
| microATX (min.) | 171 × 171 |
| Mini-ITX | 170 × 170 |
| EPIC (Express) | 165 × 115 |
| ESM | 149 × 71 |
| Nano-ITX | 120 × 120 |
| COM Express | 125 × 95 |
| ESMexpress | 125 × 95 |
| ETX/XTX | 114 × 95 |
| Pico-ITX | 100 × 72 |
| PC/104 (-Plus) | 96 × 90 |
| ESMini | 95 × 55 |
| Qseven | 70 × 70 |
| mobile-ITX | 60 × 60 |
| CoreExpress | 58 × 65 |
Embedded Platform for Industrial Computing (EPIC) is a computer form factor standard put forth by a combined effort from WinSystems, VersaLogic, Octagon Systems, Micro/sys, and Ampro.
EPIC is a new standard that solves the need for an industrial-quality SBC that fits in size between PC/104-Plus and EBX standards. EPIC is endorsed by major SBC companies. It supports both PC/104 and PC/104-Plus expansion to take advantage of the hundreds of I/O modules available worldwide. It also has the flexibility to support high speed, serial buses like PCI Express.