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<blockquote data-quote="mm1352000" data-source="post: 1141266" data-attributes="member: 82144"><p>[USER=109222]@Lehmden[/USER] </p><p>Why did you disagree with [USER=88322]@deadmonty[/USER] 's latest post? Such a response <em>does </em>come across as very rude/aggressive, as do comments like</p><p></p><p></p><p>[USER=88322]@deadmonty[/USER] </p><p>You're right that a lot of PCs have 250 - 300 W power supplies. However, they don't actually need/use all of that power most of the time. The rated power is not used because:</p><ul> <li data-xf-list-type="ul">there is over-design to enable component upgrades and/or connection of additional peripherals (future-proofing)</li> <li data-xf-list-type="ul">there is over-design to handle peak power requirements (eg. HDDs spinning up - the motors can use ~5 times rated power etc.)</li> <li data-xf-list-type="ul">PSUs aren't 100% efficient (ie. they can't convert 100% incoming AC power to DC for the PC components); they're more like 80-90% at peak efficiency</li> <li data-xf-list-type="ul">many PSU designs operate most efficiently when working at between 50 and 80% load</li> </ul></blockquote><p></p>
[QUOTE="mm1352000, post: 1141266, member: 82144"] [USER=109222]@Lehmden[/USER] Why did you disagree with [USER=88322]@deadmonty[/USER] 's latest post? Such a response [I]does [/I]come across as very rude/aggressive, as do comments like [USER=88322]@deadmonty[/USER] You're right that a lot of PCs have 250 - 300 W power supplies. However, they don't actually need/use all of that power most of the time. The rated power is not used because: [LIST] [*]there is over-design to enable component upgrades and/or connection of additional peripherals (future-proofing) [*]there is over-design to handle peak power requirements (eg. HDDs spinning up - the motors can use ~5 times rated power etc.) [*]PSUs aren't 100% efficient (ie. they can't convert 100% incoming AC power to DC for the PC components); they're more like 80-90% at peak efficiency [*]many PSU designs operate most efficiently when working at between 50 and 80% load [/LIST] [/QUOTE]
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