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Electronics finding amps

Discussion in 'Modding' started by fargo, 26 Jan 2007.

  1. fargo

    fargo What's a Dremel?

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    from what I've read watts divided by volts=amps
    so if I have a single 12v rail and a 460watt psu my
    amps would be 38.3 is this a correct method?
     
    fargo, 26 Jan 2007
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  2. SteveyG

    SteveyG Electromodder

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    If the power supply has only one output at 12V, then you'll be able to draw around 38A.

    If this is an ATX power supply then this is not the case, and you'll have to consult the label on the side of it. An ATX PSU rated for 460W is the maximum power available in total for all rails, but individual rails have individual ratings a lot lower than this.
     
    SteveyG, 26 Jan 2007
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  3. fargo

    fargo What's a Dremel?

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    on atx psu with 12v rail does 5v and3.3v have any
    effect on the total output of amps?
     
    fargo, 27 Jan 2007
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  4. SteveyG

    SteveyG Electromodder

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    The total output current (amps is a unit!!) and total output power are not the same thing.

    Look on the side of the PSU. It'll tell you the ratings for each line.
     
    SteveyG, 27 Jan 2007
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