Editing ATX (section)

==== Power switch ====
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. It utilizes a paddle-style DPST switch and is similar to the PC and PC-XT style power supplies.

Later AT (so-called "Baby AT") and LPX style computer cases have a power button that is directly connected to the system [[computer power supply]] (PSU). The general configuration is a double-pole latching mains voltage switch with the four pins connected to wires from a four-core cable. The wires are either [[solder]]ed to the power button (making it difficult to replace the power supply if it failed) or [[blade connector|blade receptacles]] were used.

[[File:ATX-Netzteil.jpg|thumb|Typical ATX 1.3 [[computer power supply|power supply]]. From left to right, the connectors are 20-pin motherboard, 4-pin "P4 connector", fan RPM monitor (note the lack of a power wire), SATA power connector (black), "Molex connector" and floppy connector.]]
[[File:ATX power supply interior.jpg|thumb|Interior view in an ATX power supply]]
An ATX power supply is typically controlled by an electronic switch connected to the power button on the computer case and allows the computer to be turned off by the [[operating system]]. In addition, many ATX power supplies have a manual switch on the back that also ensures no power is being sent to the components. When the switch on the power supply is turned off, the computer cannot be turned on with the front power button.