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How to calculate minimum power supply size

Last response: in Systems
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I regularly build office machines for my wife's company. I try to reuse existing equipment whenever possible (mostly floppies, Hard disks, and cases). When reusing a case, I have to guess if the power supply is strong enough to handle the new motherboard/processor I'm going to stuff in the case.

Can anyone suggest a way to calculate the minimum power supply I need for a given processor/MB/video?


Thanks


Bill

More about : calculate minimum power supply size

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Power supply Master

Many of us use the PSU sizing calculator available at: http://www.extreme.outervision.com/psucalculatorlite.js....

Keep in mind when you re-use a case, that the PSU with it may not be capable of putting out any more than 50% of its label claim without choking, smoking, and croaking. Fortunately, the power requirements of most business machines are very low, so a "500W" PSU that is really only capable of 250W may work fairly well.
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