is this enough for 2 4870s in crossfire?

also how do amps and volts work in a psu?
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  1. The 4870 in CF draws 255W or 21.25A. the PC P&C puts out 60A on a single rail. So yes, unless the rest of your specs are way out of the norm.

    What do you mean when you say how do volts and amps work in a PSU? Can you be more specific? Are you looking for Ohm's law or what?
  2. i dont know well what amps are...
    is there a conversion for amps-watts?
  3. Power = Voltage x Current
    (watts) = (volts) x (amps)

    That's what I recall from physics. Not sure if there are modifiers for real world applications, but that equation should give a general relationship.
  4. k cool thanks that helped a bit
  5. Since your card runs on 12 volt, your multiplier/divider is 12. So, if your card uses 120 watts, you divide 12(volts) into 120(watts)= 10 amps
  6. Yep, that will work. And that's a good one.
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