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Computer
form factors		 PCB Size
(mm)
WTX 356×425
AT 350×305
Baby-AT 330×216
BTX 325×266
ATX 305×244
LPX 330×229
NLX 254×228
microATX 244×244
DTX 244×203
FlexATX 229×191
Mini-DTX 203×170
EBX 203×146
microATX (Min. This article compares the IBM compatible Personal computer Motherboard form factors – that is the different sizes and specific or de-facto standards of major system In the area of IBM compatible Personal computers the AT form factor referred to the dimensions and layout ( form factor) of the Motherboard for In the area of IBM compatible Personal computers the AT form factor referred to the dimensions and layout ( form factor) of the Motherboard for Enhancements Low-profile - With the push for ever-smaller systems a redesigned backplane that shaves inches off height requirements is a benefit to The ATX (for Advanced Technology Extended) form factor was created by Intel in 1995. LPX (Low Profile eXtension originally developed by Western Digital was a loosely defined Motherboard format ( Form factor) widely used in the 1990s NLX (New Low Profile Extended was a form factor proposed by Intel and developed jointly with IBM, DEC, and other vendors for low profile low cost mass-marketed microATX, also known as µATX (sometimes Transliterated as mATX or uATX on Online forums is a Small form factor standard The DTX Form factor was announced to be in development by AMD on January 10, 2007. FlexATX is a PC motherboard Form factor derived from ATX. The specification was released in 1999 by Intel as an addendum to the MicroATX The DTX Form factor was announced to be in development by AMD on January 10, 2007. Embedded Board eXpandable (EBX is a standardized computer form factor microATX, also known as µATX (sometimes Transliterated as mATX or uATX on Online forums is a Small form factor standard ) 171×171
Mini-ITX 170×170
EPIC (Express) 165×115
Nano-ITX 120×120
COM Express 125×95
ETX / XTX 114×95
Pico-ITX 100×72
PC/104(-Plus) 96×90
microETXexpress
nanoETXexpress
mobile-ITX 75×45

ETX, standing for Embedded Technology eXtended, is a highly integrated and compact (3. Mini-ITX is a 17 x 17 cm (or 693 x 693 Inches) low-power Motherboard Form factor developed by VIA Technologies. 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 Nano-ITX is a computer Motherboard form factor first proposed by VIA Technologies at CeBIT in March 2003, and implemented in late 2005 COM Express, a Computer-on-module (COM form factor is a highly integrated and compact PC that can be used in a design application much like an integrated circuit ETX, standing for Embedded Technology eXtended, is a highly integrated and compact (3 Pico-ITX is a PC Motherboard form factor announced by VIA Technologies in January 2007 and demonstrated later the same year at CeBIT. PC/104 (or PC104) is an Embedded computer standard controlled by the PC/104 Consortium which defines both a Form factor Mobile-ITX is the smallest x86 compliant Motherboard Form factor. 7 x 4. 9 in. ) (95 x 125 mm) computer-on-module (COM) form factor that can be used in a design application much like an integrated circuit component. A computer-on-module ( COM) is a type of Single-board computer (SBC a subtype of an Embedded computer system Each ETX COM integrates core CPU and memory functionality, the common I/O of a PC/AT (serial, parallel, etc. ), USB, audio, graphics, and Ethernet. Ethernet is a family of frame -based Computer networking technologies for Local area networks (LANs All I/O signals as well as a full implementation of ISA and PCI buses are mapped to four high density, low profile connectors on the bottom side of the module. Industry Standard Architecture (in practice almost always shortened to ISA) was a Computer bus standard for IBM compatible computers The Peripheral Component Interconnect, or PCI Standard (commonly PCI) specifies a Computer bus for attaching peripheral devices to a Computer

ETX boards are available with AMD Geode, VIA, Intel Pentium, Celeron and Core Duo processors. For other uses of Geode see Geode (disambiguation Geode is a series of X86 -compatible System-on-a-chip Microprocessors VIA Technologies ( is a Taiwanese manufacturer of Integrated circuits mainly Motherboard Chipsets CPUs, and memory, and The Pentium brand refers to Intel 's single-core x86 Microprocessor based on the P5 fifth-generation Microarchitecture. The Celeron brand is a range of X86 CPUs from Intel targeted at budget/value Personal computers €”with the motto "delivering great quality The Core brand refers to Intel 's 32-bit mobile Dual-core X86 CPUs that derived from the Pentium M branded processors

XTXTM offers an 75% pin-compatible upgrade path to ETX standard. XTX is a new Computer-on-module (COM standard for X86 -based Embedded devices. XTX drops the ISA bus and adds PCI-Express, SATA, and LPC. Not to be confused with PCI-X, a different bus architecture Peripheral Component Interconnect Express, officially abbreviated as PCI-E

COM Express is a new COM standard. COM Express, a Computer-on-module (COM form factor is a highly integrated and compact PC that can be used in a design application much like an integrated circuit It is also known by the name "ETXexpress"; somewhat confusing because this standard has actually nothing to do with the ETX standard.

Kontron Embedded Modules is a founding member of the ETX Industrial Group (ETX-IG). ETX and ETXexpress are trademarks or registered trademarks of Kontron Embedded Modules GmbH.

Evolution of the ETX Standard

One of the fastest-growing concepts in the embedded world is the "Computer-On-Module" or COM. One of the principal COM implementations available in the market is the Embedded Technology eXtended (ETX) specification, first developed by Kontron (formerly *JUMPtec) in the early 2000.

As technology evolves, the ETX standard has undergone further development in scalability and performance. In April 2006, Kontron and the members of the ETX Industrial Group released the latest generation of the ETX 3.0 specification. ETX 30 Specification Embedded Technology eXtendend ETX, standing for Embedded Technology eXtended, Computer-on-module (COM is a highly The ETX Industrial Group (www. etx-ig. org) is an independent association of companies and individuals that work to exchange knowledge about ETX, communicate with users of the ETX world, monitor trends and ensure the ETX standard fulfills the market’s needs. Membership is open to companies all over the world who develop and produce ETX modules. Members of the ETX Industrial Group include Kontron Embedded Modules GmbH, Advantech, MSC Vertriebs GmbH, ADLINK Technology, Evalue Technology Inc. , SECO Srl, Arbor Technology Corp. , Axiomtek Co. , Blue Chip Technology, AAEON Technology Inc. , AEWIN Technologies Co. , IBase, Honeywell – CMSS and American Portwell Technology.

To obtain a copy of the ETX 3. 02 specification, visit the ETX Industrial Group website http://www.etx-ig.org .

ETX XTX COM Express / ETXexpress
Dimensions 95 × 114 mm 95 × 114 mm (ETX footprint) 110 ×155 (extended)

95 × 125 mm (basic)

95 x 95 (compact)
Legacy1 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 SATA2 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:
  1. "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, standing for Embedded Technology eXtended, is a highly integrated and compact (3 XTX is a new Computer-on-module (COM standard for X86 -based Embedded devices. COM Express, a Computer-on-module (COM form factor is a highly integrated and compact PC that can be used in a design application much like an integrated circuit Not to be confused with PCI-X, a different bus architecture Peripheral Component Interconnect Express, officially abbreviated as PCI-E Ethernet is a family of frame -based Computer networking technologies for Local area networks (LANs AT Attachment with Packet Interface ( ATA/ATAPI) is a standard interface used to connect storage devices such as Hard disks Solid-state The Low Pin Count bus or LPC bus, is used on IBM-compatible Personal computers to connect low-bandwidth devices to the CPU, such as the AC'97 (short for Audio Codec '97) is Intel Corporation 's Audio " Codec " standard developed by the Intel Architecture Labs AC'97 (short for Audio Codec '97) is Intel Corporation 's Audio " Codec " standard developed by the Intel Architecture Labs Intel High Definition Audio (HD Audio or "Azalia" refers to the specification released by Intel in 2004 for delivering high-definition audio that is capable Industry Standard Architecture (in practice almost always shortened to ISA) was a Computer bus standard for IBM compatible computers In Telecommunications, RS-232 (Recommended Standard 232 is a standard for serial binary data signals connecting between a DTE ( Data Terminal Equipment In Computing, a serial port is a Serial communication physical interface through which information transfers in or out one Bit at a time (contrast IEEE 1284 is a standard that defines bi-directional parallel communications between computers and other devices A parallel port is a type of interface found on Computers ( personal and otherwise for connecting various peripherals The PS/2 connector is used for connecting some keyboards and mice to a PC compatible computer system
  2. ETX 3. 0 adds SATA via a topside connector on the board.

Mandatory features:

External links

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