/ Sign-up
Your question


  • Graphics Cards
  • Crossfire
  • Graphics
  • Product
Last response: in Graphics Cards
September 26, 2008 6:16:51 AM

is this enough for 2 4870s in crossfire?

also how do amps and volts work in a psu?

More about : question

September 26, 2008 6:48:27 AM

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?
September 26, 2008 8:37:25 AM

i dont know well what amps are...
is there a conversion for amps-watts?
Related resources
Can't find your answer ? Ask !
September 26, 2008 9:22:34 AM

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.
September 26, 2008 10:04:56 AM

k cool thanks that helped a bit
a b U Graphics card
September 26, 2008 10:55:48 AM

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
September 26, 2008 11:48:56 AM

Yep, that will work. And that's a good one.