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  1. #1
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    asus G55VW - efficient cooling?




    so.. i got a defected unit right? should i send it back for a replacement?
    what temperature range i should be expecting?
    Last edited by jackwylde86; 08-08-2012 at 12:04 AM.

  2. #2
    ROG Guru: Green Belt Array
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    Yes, defective. 71°C I have seen often and I had about the same.

    The system works very well, trust me, I've seen Dell and Lenovo systems that will burn your fingers.

    And Kepler is not as cool as people might think.

  3. #3
    No Longer Works at ASUS Array
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    There is no answer to that question, because there are a number of environmental factors that play a part. If it's say 25C outside, then using convection cooling the laws of thermodynamics would dictate that 25C is the floor, or the absolute coolest you could get any component. Someone living near the arctic circle will have very different ranges compared to someone living near the equator.

    Your GPU temps do seem a little high, but at the same time if you're trying to play a game in a location in the middle of a heat wave at the hottest part of the day, that might be a perfectly normal temp for the circumstances. Normal in the sense that the cooling system is operating nominally and the high temps are simple physics which cannot be overcome except to make the decision to abstain from gaming during these periods of the day.

    If you wish to send the unit in for repair, that's your choice, but depending on several environmental factors, there may be nothing wrong.

  4. #4
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    This is also true. That is why I always post the room temp. Except now. For my laptop to jump from ~71°C at 32-33°C to 96°C, that heat wave needs to be rather big and the user kinda super human.

    But, in certain conditions, the laptop might perform in that way even if it's not defective.

  5. #5
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    i tested it in an air conditioned room. set it to 22C. i dont know the exact room temp. but it was around that right..? or maybe abit hotter.

  6. #6
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    ok. just did another furmark test. in an air conditioned room full blast 16C. really cold alright.

    the temp is stil in 90C range. 93-94C. definitely something is wrong with my laptop.
    started the test for about 3 secs it shoots up to 90C range. ....

  7. #7
    ASUS Reseller Array Shawnnepc's Avatar
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    Sounds like something is broken with the temp sensor .

    There's no technical way for that chip to reach that temperature in 3 secs

  8. #8
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    Quote Originally Posted by Shawnnepc View Post
    Sounds like something is broken with the temp sensor .

    There's no technical way for that chip to reach that temperature in 3 secs
    yea. it should be gradually increasing right? all of a sudden my temp went up high to 90.

    and what does throttle means? throttle down the gpu clocks or something? i got that all along running furmark.
    i`m quite noob so pls bear with me if i asked something stupid. thanks.

  9. #9
    New ROGer Array Zygomorphic's Avatar
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    Quote Originally Posted by Shawnnepc View Post
    Sounds like something is broken with the temp sensor .

    There's no technical way for that chip to reach that temperature in 3 secs
    Bingo! A little thermodynamics here:
    1) Model the GPU as a block of silicon of mass=5 grams (probably reasonable - we are ignoring copper heat pipes).
    2) Jump from 35 C to 96 C -- Kelvin (K) and Celsius (C) are the same size unit.
    3) 3 seconds of time

    Stoichiometry!
    Msi = 5 grams Si * 1 mole / 14 grams = 0.36 moles Si
    Subtraction
    dT=96-35 C=61 C
    Heat capacity->Energy used
    Cp=19.789 J/mol/K => From wikipedia
    E=Cp*dT*Msi
    E=20. J/mol/K * 61 K * 0.36 = 440 Joules
    Power = Energy / time
    1 Watt = 1 Joule / 1 sec
    P = E / t
    P = 440 Joules / 3 sec = 150 Watts!

    That would be the entire power supply, not to mention the rest of the system. Either the chip is really that small (assume 75 Watt TDP all becomes heat => mass = ~2.5 grams) and has no cooling, or the system is bad. Feel the air flowing out. Does it get really hot that fast? If not, the temp sensor is failing (unlikely) or the thermal interface material is failing (likely). Either case, contact ASUS for an RMA.
    I am disturbed because I cannot break my system...found out there were others trying to cope! We have a support group on here, if your system will not break, please join!
    http://rog.asus.com/forum/group.php?groupid=16
    We now have 178 people whose systems will not break! Yippee!
    LINUX Users, we have a group!
    http://rog.asus.com/forum/group.php?groupid=23

  10. #10
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    What's the temperature playing a game, not using Furmark?

    Is the underside actually too hot to touch? At 90C the radiated heat should be significant.

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