ATX (Advanced Technology eXtended) is a motherboard configuration specification developed SFX; TFX; WTX; AMD GES; 5 EPS12V ATX also made the PS/2-style mini-DIN keyboard and mouse connectors Power Supply Design Guide, v ยท EPS12V Power Supply Design Guide v Insignia W ATX12V /EPS12V Power Supply: Designed to power select computers; W continuous power; ATX12V /EPS12V Specifications. We’ll answer PSU spec questions of modular vs. non-modular PSUs, EPS12V vv The EPS (Entry-level Power Supply) standard is.

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In a common variant found in tower cases, the line-voltage switch was connected to the power supply with a short cable, allowing it to be mounted apart from the power supply. ATX refers to the design, and goes up to version 2. This is a minor revision from March Although a power supply with a larger than needed power rating will have an extra margin of safety against overloading, such a unit is often less efficient and wastes more electricity at lower loads than a more eps12c sized unit.

In addition, many ATX power supplies have an equivalent-function manual switch on the back that also ensures no power is being sent to the components. An additional wire ep1s2v to as ‘Power Good’ is used to prevent digital circuitry operation during the initial milliseconds of power supply turn-on, where output voltages and currents are rising but not yet sufficient or stable for proper device operation.

Archived from the original pdf on The official ATX specifications were released by Intel in and have been revised numerous times since.

InFoxconn unveiled a Foxconn F1 motherboard prototype, which has the same width as a standard ATX motherboard, but an extended Some power supplies have no-overload protection. This page was last edited on 7 Decemberat As power supply capacity increased, the ATX power supply standard was amended beginning with version 2. Efficient power supplies also save money by rps12v less power; as a result they use less electricity to power the same computer, and they emit less waste heat which results significant energy savings on central air conditioning in the summer.


Opposite the wire bundle is the back face of the power supply, with an air vent and an IEC C14 connector to supply AC power. This is the simple design of a passive PFC.

Power supplies label their total power output, and label how this is determined by the electrical current limits for each of the voltages supplied. In designs using identical chokes, the pulse width manage the ratio. Efficient power supplies also save money by wasting less power; as a result they use less electricity to power the same computer, and they emit less waste heat which results significant energy savings on central air conditioning in the summer.

By using this site, you agree to the Terms of Use and Privacy Policy. Advantages of having an EATX motherboard is dual socket support. Retrieved April 4, As transistors become smaller on chips, it becomes preferable to operate them on lower supply voltages, and the lowest supply voltage is often desired by the densest chip, the central processing unit.

Green computing and 80 Plus. A power supply that is self-certified by its manufacturer may claim output ratings double or more than what is actually provided. The long narrow profile of the power supply fits easily into low profile systems.

It was used only on high-end Athlon MP motherboards. The general configuration is a double-pole latching mains voltage switch with the four pins connected to wires from a four-core cable.

Power supply unit (computer)

Various initiatives exist to improve the efficiency of computer power supplies. From Wikipedia, the free encyclopedia. Unlike eps12 fuse or circuit breakerthese limits reset as soon as the overload is removed.

Computer power supplies may have short circuit protection, eps112v overload protection, over-voltage protection, under-voltage protection, over-current protection, and over-temperature protection.

As of ATX 2. Misquoted and misunderstood” PDF.

In AprilGigabyte announced its The system power consumption is a sum of the power ratings for all of the components of the computer system that draw on the power supply. Most modern desktop personal computer power supplies conform to the ATX specificationwhich includes form factor and voltage tolerances.


Jumpers or dip switches set the output voltages to the installed CPU’ s specification. Original AT cases flat case style have an integrated power switch that protruded from the power supply and sits flush with a hole in the AT chassis.

ATX – Wikipedia

When the power factor correction PFC was required, those filter capacitors were replaced with higher-capacity ones, together with a coil installed in series to delay the inrush current.

Some power supplies come with sleeved cables, which besides being more aesthetically pleasing, also make wiring easier and have a less detrimental effect on airflow.

Once the output power is ready to use, the Power Good signal tells the digital circuitry that it can begin to operate. Cutting the pulse by the voltage regulator the rato of the 3. If using an ATX PSU for purposes other than powering an ATX motherboard, power can be fully turned on it is always partly on to operate “wake-up” devices by shorting the “power-on” pin on the ATX connector pin 16, green wire to a black wire groundwhich is what the power button on an ATX system does.

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Power supply unit (computer) – Wikipedia

Now all modern computers use switched-mode power supplies, which are lighter, less costly, and more efficient than equivalent linear power supplies. The most recent ATX motherboard specification is version 2. When the assignment of eps1v2 to rails is done at manufacturing time it is not always possible to move a given load to a different rail or manage the allocation of current across devices. In ATX-style systems, the front-panel power switch provides only a control signal to the power supply and does not switch the mains AC voltage.