What is

Form Factor – What is Computer Form factor?

What is Form factor?

Motherboards are produced in a variety of sizes and shapes called form factor. It includes the dimensions, power supply type, location of mounting holes, number of ports on the back panel, etc.

Today, the most common motherboard form factor for desktop computers is the ATX form factor.  Below is a listing of the various motherboard form factors.

  • AT
  • Baby AT
  • ATX
  • Micro ATX
  • BTX
  • DTX
  • ITX
  • LPX

1) AT (Advanced Technology) form factor

Introduced by – IBM

Dimensions  – 12″ wide x 13.8″ deep

Fits into – fits into a full size AT tower case

Usage – rarely found or used

fullat

2) Baby AT form factor

Introduced by – IBM

Dimensions – 8.57″ wide x 13.04″ deep

Fits into – fits into a full size AT style  case

Usage – not used now

3) ATX (Advanced Technology eXtended)

Its COM port, LPT port, PS/2, and USB are mounted directly on the motherboard.

Introduced by –Intel

Dimensions – 12″ wide x 9.6″ deep

Fits into – fits into an ATX case

Usage – widely used today

ATX type motherboard has many advantages over the other form factors

4) micro ATX form factor

Introduced by –Intel

Dimensions – 9.6″ wide x 9.6″ deep to 6.75″ wide x 6.75″ deep

Fits into – fits into an ATX or smaller case

5) BTX (Balanced Technology Extended)

Introduced by –Intel as a replacement for ATX. The BTX features a low profile, more efficient layout to facilitate cooling, and a scalable board to accommodate different system sizes, and support for high-mass motherboard components. In September 2006, Intel announced that it was stopping all future development of BTX.

6) DTX (discontinuous transmission) form factor

Introduced by – AMD

Dimensions – 8″ wide x 9.6″ deep

Fits into – fits into an ATX case

Usage –It was intended to be an industry standard for small computers, like the Shuttle “SFF” design. DTX motherboards are backward compatible with the ATX form factor, fitting into the same-sized cases, and utilizing the same 24-pin power connector.

7) ITX (Information Technology eXtended) form factor

Introduced by – VIA Technologies

Usage – They are typically used in low-cost small setups found in cars, network devices, set-top boxes, and other small computers.

Dimensions

Mini-ITX – 6.75″ x 6.75″

Nano-ITX – 4.7″ x 4.7″

Pico-ITX – 2.8″ x 3.9″

Mobile-ITX – 2.8″ x 3.9″

itx

8) LPX (Low Profile eXtension) form factor

Introduced by – Western Digital

Dimensions – 9″ wide x 13″ deep

Usage – was widely used in the 1990s.

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