title: XTX
text: # XTX
  
  XTX is a computer-on-module (COM) standard for x86-based embedded devices. XTX adds PCI-Express, SATA, and LPC capabilities. The standard was promulgated by Advantech Corporation, Ampro, and Congatec.
  
  | vte | ETX | XTX | COM Express (Type 2) |
  | - | - | - | - |
  | Dimensions | 95 × 114 mm (3.7 × 4.5 in) | 95 × 114 mm (3.7 × 4.5 in) (ETX footprint) | 110 × 155 mm (4.3 × 6.1 in) (extended) 95 × 125 mm (3.7 × 4.9 in) (basic) 95 × 95 mm (3.7 × 3.7 in) (compact) 55 × 84 mm (2.2 × 3.3 in) (mini) |
  | $Legacy^1$ support | Full legacy | Legacy except ISA | Legacy except ISA |
  | PCI Express support | - | 4 Lanes | up to 6 Lanes (basic) |
  | PCI Express Graphic support | - | - | up to 16 Lanes |
  | Ethernet support | 10/100 | 10/100 | 10/100/1000 |
  | IDE support | 2 IDE, 2 $SATA^2$ | 2 IDE, 4 SATA | IDE, 4 SATA |
  | LPC support | - | yes | yes |
  | USB support | 4 USB | 6 USB | 8 USB |
  | Audio support | Line In/Out, Mic | AC'97, Line In/Out, Mic | AC'97, Line In/Out, Mic, AC'97 digital, HDA |
  | Power | 5V, 5VSB | 5V, 5VSB | 12V, 5VSB |
  | Notes: "Legacy" is defined as the older PC peripherals and bus, such as ISA bus, RS-232 serial, IEEE 1284 parallel, floppy, and PS/2 keyboard & mouse. ETX 3.0 adds SATA via a topside connector on the board. ||||
  