Standard ATX (Advanced Technology Extended) developed
as an evolution of the Baby-AT form factor, to improve the functionality of
current I / O and reduce the total system cost. It is a motherboard form factor
created by Intel in 1995. The previous form factor was called
AT, which was entirely replaced by the ATX.

Which is the second generation of power supplies, introduced to the
market for Intel® Pentium MMX microprocessor computers, and from that moment on
its use extended.

The ATX source is a device that internally coupled in the computer cabinet, which is responsible for transforming the alternating current of the power line into the direct current; as well as reduce its voltage. This current used by the electronic and electrical elements of the computer. Other functions are to supply the amount of current and voltage that the devices require as well as to protect them from problems in the power supply such as power surges. The ATX source can be called the ATX power source, ATX power supply, digital source, digital ignition source, push-button sources, among other names.

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formats are many in the market, each one oriented to a more or less specific
type of computer use.

Since, as of today, there are about 40 formats of motherboards that are used or have been used inside personal computers in different periods.

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  • It
    is a digital ignition, that is, it has a button instead of a mechanical switch
    like its predecessors.
  • Some
    models integrate a rear mechanical switch to avoid unnecessary consumption of
    electrical energy, preventing the standby state during which they consume
    minimal amounts of electricity.
  • These
    types of sources are integrated from the Intel® Pentium MMX microprocessor
    equipment to the equipment with the most modern microprocessors.
  • The
    shutdown of this type of sources can manipulate with software.
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Uses of ATX

They are used
to supply the necessary for the proper operation of electrical power devices,
being in horizontal cabinets, mini-tower cabinets, and duplicator towers. Depending
on the number of tools to be fed, the capacity of the source must be higher.
Currently all modern equipment includes an ATX power supply, in the same way
the operating systems are capable of controlling the ATX sources (previously
when turning off the system from the “Start” button of Microsoft®
Windows, the system was closed and stayed in display a message to turn off the
system from the mechanical cabinet button).

ATX Motherboard

ATX Motherboard

The first motherboards that follow the ATX form factor reach the market in 1995 by Intel. This plate format has dimensions of 305 x 244 mm (although some manufacturers of plates employ somewhat smaller measures), and it has become a standard by which the production of market motherboards is carried out.

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The use of
these plates is very varied, not having an illustrative purpose. Therefore, it
is reasonable to find this type of boards both in-office systems, as in work
equipment or gaming equipment. They usually have up to 7 expansion slots and up
to 4 slots for RAM modules. In general, this form factor is the most used by
most domestic users.

ATX Micro Motherboard

ATX Micro Motherboard

An evolved
form factor of the ATX above, but 25% smaller (its dimensions are 244 x 244
mm). The four upper holes usually coincide with those of the ATX motherboard,
but the lower two do not.

Generally, this type of boards widely used for office computers and small computers, such as those mounted in HTPC boxes or specific low-cost gaming configurations. As a rule, they usually have space for the installation of 5 expansion cards, although this may vary by model. They also have space for the installation of up to 4 RAM modules.

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