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Asus Rog Swift PG278Q - power supply broken, will this one work...

Discussion in 'Power Supplies' started by SouthEastBlue, Dec 8, 2018.

  1. SouthEastBlue

    Wise Guy

    Joined: Jul 10, 2010

    Posts: 1,978

    Location: Gtr London

    Sparing the long story, will a Delta power brick from a laptop with the following specs be safe to use on my Asus Rog Swift PG278Q?

    Delta ADP-40PH
    19v
    2.1A
    40W

    The Rog Swift power brick is rated :


    Asus ADP-90YD.B
    19v
    4.7A
    90W

    The lower powered laptop charger seems to be powering the screen fine for now browsing the web, but will it cause any damage being lesser spec? Whats the worse that could happen?

     
  2. Sasahara

    Mobster

    Joined: Feb 12, 2009

    Posts: 3,691

    I wouldn't, as looking at the specs for that monitor it has a power usage of 38.7 W.

    For me that's too close to the rating for the Delta. The chances are you will be getting higher spike power draw given they are supplying a 90 W power unit.

    So maybe a a very temp usage, but keep a good eye on it. Delta are a good make so if it is overloaded it should cut out.

    And don't use the USB hub feature as I'm assuming it's powered hub and will draw more power.
     
  3. SouthEastBlue

    Wise Guy

    Joined: Jul 10, 2010

    Posts: 1,978

    Location: Gtr London

    Thanks for your reply/help.

    I tried to reduce the power draw of the monitor as much as I can by reducing the brightness and turning off the flashy glowing red base.

    It seems to be alright for now, and was just a stop gap until I get paid so hopefully holds out at least until Christmas is over!
     
  4. Rroff

    Man of Honour

    Joined: Oct 13, 2006

    Posts: 61,110

    With turning down the brightness you should be able to get it within those specs but I highly recommend atleast 4amp/19V so as to be able to handle current spikes due to things like capacitors charging and other features.

    The stock power brick for those monitors is absolute junk - I've stuck a couple of them on an oscilloscope and the regulation is very poor - infact you are probably in no worse position using that Delta than the stock one hah - the amount of ripple and voltage jumping around under load can't be good at all for the monitor.
     
  5. EsaT

    Soldato

    Joined: Jun 6, 2008

    Posts: 5,348

    Location: Finland

    But isn't that exactly the purpose?
    To get buyer have need to buy another gaming trinket after few years...
     
  6. Rroff

    Man of Honour

    Joined: Oct 13, 2006

    Posts: 61,110

    It wouldn't surprise me at all - same as has been mentioned recently about some circuits specifically designed so that the heat from one component ensured a shorter lifespan for another despite it being possible to design a PCB to avoid that.