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...efficiency requirements for external power supplies The European Commission...energy performance of external power supplies. The regulation comes into...third by 2020. The external power supplies convert power input from the mains...
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Power supply is a reference to a source of electrical power. A device or system that supplies electrical or other types of energy to an output load or group of loads is called a ...
http://en.wikipedia.org/wiki/Power_supply
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Xoxide.com offers a huge variety of computer power supplies including the standard ATX power supply, modular power supplies, and light up power supplies, as chosen by members of ...
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