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    SXPS 1645 power adapter

    Discussion in 'Dell XPS and Studio XPS' started by fred2028, Dec 2, 2009.

  1. fred2028

    fred2028 Sexy member

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    How do I tell if mine is 130 W or 90 W? I have 2 adapters: the 1st came with my older 1640 and says 90 W on the front, while the newer one that came with my 1645 does not say anything related to W. The part # is WK890 and everything else is about Amps, Voltages, Made in China, etc.
     
    fred2028, Dec 2, 2009
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  2. mmehtas

    mmehtas Newbie

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    Amps X Volts = Watts

    Multiply the amp rating by 110 to get the watts.

    EDIT: as Romills pointed out, you have to multiply the OUTPUT voltage (not the 110V as I erroneously listed above).
     
    mmehtas, Dec 2, 2009
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  3. ryancouture

    ryancouture Notebook Consultant

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    guess you got my youtube message FRED
     
    ryancouture, Dec 2, 2009
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  4. ryancouture

    ryancouture Notebook Consultant

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    i think you got yours before this whole debacle started anyway its most likely the 90w
     
    ryancouture, Dec 2, 2009
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  5. eblock12

    eblock12 Notebook Consultant

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    If you look in the BIOS setup it will list the wattage of the adapter that's plugged in.
     
    eblock12, Dec 2, 2009
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  6. ryancouture

    ryancouture Notebook Consultant

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    hows yours doing on the power front? noticing problems?
     
    ryancouture, Dec 2, 2009
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  7. romills

    romills Notebook Guru

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    Fred,
    You need to look at the output rating, that is in DC, which can be multiplied straight up. The input is in AC which is 110V peak to peak, but is not a straight mulitply. The output should be 19.5V and then you multiply that by the rated amperage.
     
    romills, Dec 2, 2009
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  8. eblock12

    eblock12 Notebook Consultant

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    Yeah I was one of the first people to get the laptop, and complained about the 90 watt adapter the same day. :)
     
    eblock12, Dec 2, 2009
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  9. ryancouture

    ryancouture Notebook Consultant

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    i notice you have ultimate installed there - guessing you did a clean wipe

    any specific dell drivers you recommend installing?

    or NEED installing

    i mean do the brightness keys and whatnot/backlit keyboard all work without dell drivers?
     
    ryancouture, Dec 2, 2009
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  10. eblock12

    eblock12 Notebook Consultant

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    I'd install all the Dell drivers and also their QuickSet program. The keys will work fine but without QuickSet installed there is no indicator on-screen when you change brightness or volume, so it's handy to have installed.
     
    eblock12, Dec 2, 2009
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