05-19-2010 07:38 AM
Well the absolute best way is to look at the nameplate of the power supply. Remove the side panel of the computer case, with the computer OFF. There should be a nameplate on the power supply that will tell just what is being asked. Most PS for that style/model are no more than 300 watts.
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05-19-2010 08:26 AM
One of the important numbers on the label is the 12 volt amperage along with the total wattage. Follow TheOldMan's advice.
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