PCApex (who were PimpRig until yesterday) has just released a power consumption calculator, called Juice.  Just pick all of your components from the drop down menus and it calculates your total power needs, don’t forget to specify the number of each component you have.  The only caveat is that this tool calculates total power consumption, it doesn’t specify loads on each seperate rail.

“Fu3lman has released a new application which is an advanced PC wattage calculator for determining the power usage of your system. (This is an expanded power calculator that goes beyond what his previously released Overclockulator could do and is a totally rewritten application.)”

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