TIPOS DE TARJETAS:

* XT (8.5 × 11" ó 216 × 279 mm)

* AT (12 × 11"–13" ó 305 × 279–330 mm)

* Baby-AT (8.5" × 10"–13" ó 216 mm × 254-330 mm)

* ATX (Intel 1996; 12" × 9.6" ó 305 mm × 244 mm)

* EATX (12" × 13" ó 305mm × 330 mm)

* Mini-ATX (11.2" × 8.2" ó 284 mm × 208 mm)

* microATX (1996; 9.6" × 9.6" ó 244 mm × 244 mm)

* LPX (9" × 11"–13" ó 229 mm × 279–330 mm)

* Mini-LPX (8"–9" × 10"–11" ó 203–229 mm × 254–279 mm)

* NLX (Intel 1999; 8"–9" × 10"-13.6" ó 203–229 mm × 254–345 mm)

* FlexATX (Intel 1999; 9.6" × 9.6" ó 244 × 244 mm max.)

* Mini-ITX (VIA Technologies 2003; 6.7" × 6.7" ó 170 mm × 170 mm max.;
100W max.)

* Nano-ITX (VIA Technologies 2004; 120 mm × 120 mm max.)

* BTX (Intel 2004; 12.8" × 10.5" ó 325 mm × 267 mm max.)

* MicroBTX (Intel 2004; 10.4" × 10.5" ó 264 mm × 267 mm max.)

* PicoBTX (Intel 2004; 8.0" × 10.5" ó 203 mm × 267 mm max.)

* WTX (Intel 1998; 14" × 16.75" ó 355.6 mm × 425.4 mm)

* ETX y PC/104, utilizados en sistemas embebidos.