PSU cable reusable?

By Alexexex ยท 7 replies
May 8, 2011
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  1. I've recently found a new power supply lying around my house. Being of a better quality than my current computer's power supply I was thinking that I could replace my current one with that power supply. Only problem is that I can't find the power cable anywhere... So I was wondering if I could use the old power cable on the newer power supply... Any thoughts?
  2. seanc

    seanc TS Rookie Posts: 88

    The power cable that goes between the computer and the wall? Of course you can!
  3. Alexexex

    Alexexex TS Enthusiast Topic Starter Posts: 106

    Ohhhhh that's great news! I was thinking that these cables had individual power ratings so it actually made a difference...
  4. captaincranky

    captaincranky TechSpot Addict Posts: 13,036   +2,558

    Underwriters Laboratory wouldn't approve the AC input cord, if it wasn't capable of carrying 15 Amps, at it's length of about 6 feet.

    An AC line running @ 15 amps is equal to 1875 watts. @ only 70 % power transfer efficiency, that would power a 1300 watt PSU. Although granted, the cord might get slightly warm to the touch at that point.

    You're not planning any sort of extravaganza that needs more than 1300 watts of PSU output to power it, are you?
  5. Alexexex

    Alexexex TS Enthusiast Topic Starter Posts: 106

    Nope its a 550W vs a 700W psu, which hopefully would allow me to use a more demanding graphics card. Speaking of which, how would one find out the maximum limit of their graphics card power usage?
  6. captaincranky

    captaincranky TechSpot Addict Posts: 13,036   +2,558

    Buy one of these:

    This will give you the maximum AC side draw in watts. Approximate DC wattage (computer side) can be reached by multiplying the max AC wattage by the PSU efficiency percentage. As to measuring directly on the DC side, that's a whole lot harder and more expensive to do.
  7. Alexexex

    Alexexex TS Enthusiast Topic Starter Posts: 106

    Ahhhh ok... so I'll just get one of those meters and calculate my computer power usage with and without my graphics card.

    Thank you guys for all the help and clarification, I appreciate it.
  8. hellokitty[hk]

    hellokitty[hk] Hello, nice to meet you! Posts: 3,448   +145

    I don't think that's necessary.

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