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Most personal computer power supply units meet the [[ATX]] standard and convert from [[alternating current]] (AC) at between 120 and 277 [[volts]] provided from a [[power outlet]] to [[direct current]] (DC) at a much lower voltage: typically 12, 5, or 3.3 volts.<ref>{{cite book |last1=Wilson |first1=Kevin |title=Exploring Computer Hardware: The Illustrated Guide to Understanding Computer Hardware, Components, Peripherals & Networks |date=2022 |publisher=Elluminet Press |isbn=978-1-913151-73-7 |url=https://books.google.com/books?id=RaN4EAAAQBAJ&dq=%22power+supply+(PSU)+converts+high%22&pg=PT111 |language=en}}</ref>
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[[File:Computer-motherboard.jpg|thumb|Computer motherboard]]
{{Main|Motherboard}}
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