Power supply unit (computer) | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-01-02

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Power_supply_unit_(computer)


00:01:31 1 Functions
00:07:26 2 Development
00:07:35 2.1 Original IBM PC, XT and AT standard
00:11:20 2.2 ATX standard
00:13:20 2.2.1 ATX12V standard
00:16:40 2.2.2 +3.3&#160;V and +5&#160;V rails
00:21:17 2.2.3 Entry-Level Power Supply Specification
00:23:27 2.2.4 Single vs. multiple +12&#160;V rail
00:29:29 2.3 12&#160;V–only supplies
00:31:19 3 Power rating
00:33:48 4 Efficiency
00:40:15 5 Appearance
00:42:21 5.1 Connectors
00:48:22 5.2 Modular power supplies
00:49:20 6 Other form factors
00:51:30 7 Life span
00:53:09 8 Wiring diagrams
00:54:02 9 Testing
00:54:12 10 See also
00:54:26 11 Notes
00:54:52 12 References



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SUMMARY
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A power supply unit (or PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. Modern personal computers universally use switched-mode power supplies. Some power supplies have a manual switch for selecting input voltage, while others automatically adapt to the mains voltage.
Most modern desktop personal computer power supplies conform to the ATX specification, which includes form factor and voltage tolerances. While an ATX power supply is connected to the mains supply, it always provides a 5 Volt standby (5VSB) voltage so that the standby functions on the computer and certain peripherals are powered. ATX power supplies are turned on and off by a signal from the motherboard. They also provide a signal to the motherboard to indicate when the DC voltages are in spec, so that the computer is able to safely power up and boot. The most recent ATX PSU standard is version 2.31 as of mid-2008.