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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This page was last edited on 31 Decemberat Retrieved April 4, Archived from the original on ATX is the most spc motherboard design.

Archived from the original PDF on October 21, 22 Voltage drop on connectors forced the designers to place such buck converters next to the device. Designed for dual CPUs, and quad double slot video cards. A number of manufacturers have added one, two or three additional expansion slots at the standard 0. When newer CPUs required higher currents, switching mode voltage regulators like buck converters replaced linear regulators for efficiency.

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Power supply unit (computer)

Various initiatives exist to improve the efficiency of computer power supplies. 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 of these PSUs use two different chokes, feeding the to the 3. By using this site, you agree to the Terms of Use and Privacy Policy.


Climate Savers Computing Initiative promotes energy saving and reduction of greenhouse gas emissions by encouraging development and use of more efficient power supplies. ATX allowed each motherboard manufacturer to put these ports in a rectangular area on the back of the system with an arrangement they could define themselves, though a number of general patterns depending on what ports the motherboard offers have been followed by most manufacturers.

A modular power supply provides a detachable cable system, offering the ability to remove unused connections at the expense of a small amount of extra electrical resistance introduced by the additional connector.

When the assignment of connectors 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. Modern personal computers universally use switched-mode power supplies. This protects against system performance degradation, and against power supply overloading.

Originally AT style cases had only a keyboard connector and expansion slots for add-on card backplates. Although these boards have room for additional expansion slots 9 and 8 total, respectivelyall three provide only seven expansion connectors; the topmost positions are left vacant to provide more room for the CPU, chipset and associated cooling. Jumpers or dip switches set the output voltages to the installed CPU’ s specification.

Misquoted and misunderstood” PDF. The Apple II design by Atari engineer Rod Holt was awarded a patent, [2] [3] and was in the vanguard of modern computer power supply design.

ATX – Wikipedia

Computing portal Electronics portal. Most modern desktop personal computer power supplies conform to the ATX specificationwhich includes form factor and voltage tolerances. The most recent ATX motherboard specification is version 2. It was epe12v first major change in desktop computer enclosuremotherboard and power supply design in many years, improving standardization and interchangeability of parts.


Calvert; University of Denver. Green computing and 80 Plus. The current limits for each group of cables is then documented so the user can avoid placing too many high-current loads in the same group. Some of them are:. A power supply that is self-certified by its manufacturer may claim output ratings double or more than what is actually provided. Els12v page was last edited on 7 Decemberat External eps12b supply could send data about itself power, current and voltage ratings to the computer.

Originally, the motherboard eps112v powered by one pin connector. Most desktop personal computer power supplies are a square metal box, and have a large bundle of wires emerging from one end.

This is a minor revision from March Numbering of pes12v ATX revisions may be a little confusing: Several ATX-derived designs have been specified that use the same power supply, mountings and basic back panel arrangement, but set different standards for the size of the board and number of expansion slots.

A minimum load on one or more voltages may be required varies by model fps12v vendor ; the standard does not specify operation without a minimum load and a conforming PSU may shut down, output incorrect voltages, or otherwise malfunction, but will not be hazardous or damaged.

This pinout on the motherboard connector is as follows when viewing the motherboard from above:. The CE mark is required for power supplies sold in Europe and India.

This is the simple design of a passive PFC. This is a minor revision sped August This voltage was required by the ISA bus, which is no longer present on almost all modern computers.