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#PS_ON pin is marked by number 16. PS-ON Signal is a pin on a 20-pin or 24-pin ATX-specified power connector used to turn a personal computer power supply unit on/off. The PS_ON pin is normally pulled high in an open-circuit, but will turn on the power supply when it is pulled low, by shorting it to the common signal (COM).
For example, a 900-watt power supply with the 80 Plus Silver efficiency rating (which means that such a power supply is designed to be at least 85% efficient for loads above 180 W) may only be 73% efficient when the load is lower than 100 W, which is a typical idle power for a desktop computer. Thus, for a 100 W load, losses for this supply ...
The 9500 is also the first computer from Apple to support 168-pin DIMM memory modules, and the 512 KB of on-board 128-bit-wide cache utilizes copy-back instead of write-through, offering faster speeds than prior Macintosh models, [3] as well as the ability to install single modules (although matched pairs are recommended for best performance [5]).
Steam turbine generator: The first commercial Westinghouse steam turbine-driven generator, a 1,500 kW unit, began operation at Hartford Electric Light Co. in 1901. The machine, nicknamed Mary-Ann, was the first steam turbine generator to be installed by an electric utility to generate electricity in the US.
A generator interlock kit (or a transfer switch), eliminates the need for extension cords to power appliances. [2]Like a transfer switch, an interlock kit lets the generator energize the panel and all of its circuits (up to the load capacity of the generator); not just corded appliances.
Stand-alone switched-mode power supply An adjustable switched-mode power supply for laboratory use. A switched-mode power supply (SMPS), also called switching-mode power supply, switch-mode power supply, switched power supply, or simply switcher, is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently.
Edison even suggested that a Westinghouse AC generator should be used in the State of New York's new electric chair. Westinghouse also had to deal with another AC rival, the Thomson-Houston Electric Company, which had constructed 22 power stations by the end of 1887 [21] and by 1889 it had acquired another competitor, the Brush Electric Company.
This is a critical point – each power supply must be able to power the entire server by itself. Redundancy is further enhanced by plugging each power supply into a different circuit (i.e. to a different circuit breaker). Redundant protection can be extended further yet by connecting each power supply to its own UPS.