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  1. #21
    ROG Guru: Yellow Belt Array AdelaisAer's Avatar
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    Quote Originally Posted by Tear_a_Bee View Post
    Are u sure that will support the g74? Seems kinda crazy a 330w PSU!!!
    That definitely won't fit the G74SX...unless it has the same dimensions port as that of the Alienware. :S But, 330W is a bit over the top. I think 180 should be enough.
    Asus G74SX-DH72 [203]

    • 16GB RAM
    • nVidia GeForce GTX 560M 3GB VRAM
    • Intel Core i7-2670QM 2.20GHz
    • Windows 10 64-bit
    • Intel 520 SSD - 180GB
    • 700GB 7200rpm HDD (x2 paritions, 350GB each)

  2. #22
    ROG Guru: Green Belt Array fostert's Avatar
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    Quote Originally Posted by AdelaisAer View Post
    That definitely won't fit the G74SX...unless it has the same dimensions port as that of the Alienware. :S But, 330W is a bit over the top. I think 180 should be enough.
    Power Supply 101...
    First, Watts=VoltsxAmps. If the PS is rated at 200, 300, 500 or even 1000W but has only 19V of "push" it will work 100% fine with any laptop needing 19V. Period. The laptop may only draw say 19Vx10Amps=190Watts from the thing, but thats all its asks for...a higher wattage PS will not "push" more energy into the device than it needs, its the device that places the load on the PS and draws current only for what its rated for. So you could run the G74 with a 100W PS but since it can pull 8 Amps when its working really hard, your PS would have to deliver 19Vx8Amps=~150 Watts, which a 100W could not do without a serious voltage drop, or it might do until something inside it popped! Moral: too much wattage is not a bad thing.
    Never plug an adaptor in to your notebook unless it has the same voltage rating that the notebook is rated for. An overvolt will kill your power circuitry in the mainboard. Dead. An undervolt will run your notebook unstably, or not at all (i.e. it may not even turn on).
    That Dell 330W doesn't specify the voltage so I would be wary of it.
    --
    G74SX-CST1-CBIL, i7 2630QM 2GHz
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  3. #23
    New ROGer Array
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    I have a 180w charging adapter for the G75v and it still seems to get hot. Is that normal?

  4. #24
    ROG Enthusiast Array
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    hey . during winter in canada it can be used as a nice footwarmer
    ASUS G74SX-DH73-3D
    Intel Core i7-2670QM Processor
    12 GB DDR3 RAM
    1.5 TB Hard Drive
    Nvidia GTX 560M 3GB
    Windows 7 Home Premium 64-bit

  5. #25
    ROG Guru: Yellow Belt Array
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    150 watts for G53JW and much cooler than tiny 90 watt ones used of less powerful notebooks. Because it's really gigatic thus passive cooling seems in action.
    ASUS G53JW-XA1

  6. #26
    ROG Guru: Green Belt Array fostert's Avatar
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    All power supplies get warm because the switching mode from AC to DC power is less than 100% efficient. E.g. while your laptop may need 120W from the power supply to play games at full load, etc, what you will be drawing from the wall will be typically 20-30% more (150-170W). This excess power gets turned into heat by the less-than-ideal characteristics of the electronics inside the power supply. So they get warm.

    A power supply is most efficient when it is supplying ~50% of its rated max. So, if you want the coolest power supply for your G75, buy a 200W or more adaptor (the G75 will still only draw the 120W it needs, and never 200W!).
    Last edited by fostert; 08-19-2012 at 06:15 AM.
    --
    G74SX-CST1-CBIL, i7 2630QM 2GHz
    32GB DDR3 RAM @1333MHz
    GTX560M 3GB DDR5 (192 bit)
    17.3" LED 1920x1080
    Sentelic TP, BIOS 203
    Debian Linux Wheezy (Testing) Kernel 3.2, NVIDIA 295.40

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