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How do you determine the wattage capacity needed by a power supply?

How do you determine the wattage capacity needed by a power supply?
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How do you determine the wattage capacity needed by a power supply?

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User Ponyboy
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We could use the formula for the Power supply in order to find the wattage capacity and it would be:

P = V²/R or P = V * I

Hope this helps!
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User Damian Busz
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