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PSU calculators

Discussion in 'Hardware' started by Cockles, Nov 17, 2006.

  1. Cockles

    Cockles Megabyte Poster

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    Hi

    Does anyone know any good online PC power calulators?

    I have found these two, which are giving me a reasonably close answer, but was looking for a 3rd, 4th and 5th opinion.

    http://www.journeysystems.com/power_supply_calculator.php
    http://extreme.outervision.com/psucalculator.jsp

    According to these, the 550W power supply I have just bought and installed is pointless, not only am I using no where near that power, but (and I know this is my fault) it doesn't have enough Maxor connectors, so I can run my hard and optical drives, but none of my internal fans. Buggeration!!!!!

    As always, thanks
     
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  2. Mr.Cheeks

    Mr.Cheeks 1st ever Gold Member! Gold Member

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    i think these should be used as a guideline.
     
  3. Cockles

    Cockles Megabyte Poster

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    Cool, I've just bought a new video card so was worried about the power consumption with that and bought the PSU with it, think I've gone a bit overkill though

    One thing I have learnt, don't buy cheap generic PSUs, waste of time
     
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  4. Mr.Cheeks

    Mr.Cheeks 1st ever Gold Member! Gold Member

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    dont buy cheap anything thats essential, buy what you can afford.
     
  5. Bluerinse
    Honorary Member

    Bluerinse Exabyte Poster

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    If your new PSU is rated at 550 Watts and the load from your devices is much less than 550 Watts then that is a good situation, not bad. It means your PSU will not be running at or near it's maximun power output. Hence it is far more likely to be reliable over a longer period of time. You have not wasted your money, you have made a good purchase, well apart from the lack of fan plugs. Maybe there is an expansion connector which can increase the number of plugs to suit your situation.
     
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  6. Boycie
    Honorary Member

    Boycie Senior Beer Tester

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    Cockles,

    Sounds like you need an adapter;
    the fans take very little power, so add as many as you need.

    As for Calculators, I have seen a few (including yours) who all give the same output.

    Si
     
    Certifications: MCSA 2003, MCDST, A+, N+, CTT+, MCT
  7. Phoenix
    Honorary Member

    Phoenix 53656e696f7220 4d6f64

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    Modern PC power supplies are switched systems, meaning they will draw what they need not constantly there max rated output and they often fall into the 85% percentile on efficiancy

    as for the molex connectors for your fans, i dont think anyone dedicates individual molex to each fan, its awaste of connectors, as fans draw such little current you can stack these up, i have about 4 fans plugged into one chain

    hope that helps, my new PSU is going to be a staggering 700+ watts to power everything!, those new GeForce 8800s draw over 405w each under heavy load!
     
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  8. Stoney

    Stoney Megabyte Poster

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    Or you can get those inline molex adapters that allow you to plumb a fan into a molex connector that is being used. I don't know where you'd pick them up from but mine came with my fans.
     
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