Fan noise & Clamshell mode

Discussion in 'MacBook Pro' started by SDAVE, May 3, 2012.

  1. SDAVE macrumors 68040

    SDAVE

    Joined:
    Jun 16, 2007
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    #1
    Have the 2011 Early 15" MBP 2.3Ghz, 16GB Ram and Samsung 830 SSD.

    Also an external 23" ACD.

    When I work from home I'm usually in the clamshell mode...doing a lot of research, it seems that almost everyone has this issue. The fan gets really loud and music doesn't even drown it out completely.

    When I do heavy tasks, ie Photoshop, After Effects, it goes berserk.

    Tried smcFanControl and a few others to force it to stay at 3000RPM at least, but to no avail.

    Anyone doing any workarounds? Besides moving it away from it being next to the computer?

    Thanks
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    Where is the MBP sitting? And how? Flat on the desk? In a stand of some sort? How is the ventilation around the vents at the rear, near the hinge?
     
  3. SDAVE thread starter macrumors 68040

    SDAVE

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    #3
    Flat on the desk next to the monitor, ventilation available all around. Room temperature is fairly cool.
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    Heavy tasks are always going to cause increased temps and higher fan speed, even without clamshell mode. You might try elevating the rear of the MBP an inch or two off the desk, to aid in heat dissipation.
     
  5. SDAVE thread starter macrumors 68040

    SDAVE

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    #5
    That's understandable as well as the heat, but it jumps to 83°c and the fans to 6000rpm even on simple tasks like a simple flash video...and I assume two of the cores are being used in this case.

    smcFanControl doesn't seem to do anything.

    This laptop is extremely powerful, but the cooling system is fairly bad. Reminds me of HP laptops.
     
  6. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #6
    Well, Flash is notorious for consuming system resources. The next time it happens, try this:
    1. Launch Activity Monitor
    2. Change "My Processes" at the top to "All Processes"
    3. Click on the CPU column heading once or twice, so the arrow points downward (highest values on top).
    4. Click on the System Memory tab at the bottom.
    5. Take a screen shot of the whole Activity Monitor window, then scroll down to see the rest of the list, take another screen shot
    6. Post your screenshots.
     
  7. dusk007 macrumors 68040

    dusk007

    Joined:
    Dec 5, 2009
    #7
    smcFanControl only changes the minimum Fan speed.
    If set to 4000rpm it will run never lower than 4000rpm even if the CPU is at 40C but it will ramp up if the CPU gets hot. It never limits the maximum speed because that would kill the chips.
    What did you expect it does?

    Cooling in Clamshell mode is worse. I recommend using it with open lid and just shutting the display off. Air intake is just so much worse in clamshell.
    Normal Notebooks suck in Air at the bottom, they don't care if the lid is open or closed. Apple Notebooks are different.
     
  8. heisenberg123 macrumors 603

    heisenberg123

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    Oct 31, 2010
    Location:
    Hamilton, Ontario
    #8
    ive been converting all my AVI movies to MP4 over the last few days, im talking a few hundred movies so its been going for hours and hours, sure there is some fan noise but no more or less than when i was doing some converting with the lid open.


    i dont really believe clamshell mode should increase or descrese heat
     
  9. Comeagain? macrumors 68020

    Comeagain?

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    Feb 17, 2011
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    Spokane, WA
    #9
    Why would effectively limitting the airflow not influence heat?
     
  10. heisenberg123 macrumors 603

    heisenberg123

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    #10

    Is the vents not along the hindge at the back?
     
  11. GGJstudios macrumors Westmere

    GGJstudios

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    May 16, 2008
    #11
    Airflow is not limited in clamshell mode. The vents are still exposed with the lid closed.
     
  12. Bartman01 macrumors regular

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    Oct 23, 2008
    #12
    You would be surprised at how much heat actually naturally dissipates up through the keyboard/trackpad/top surface area. ANY laptop I have ever used (Mac or PC) runs much hotter with the lid closed than with it at least cracked open.
     
  13. iLukeJoseph macrumors 6502

    Joined:
    Dec 20, 2011
    #13
    I would suggest checking out the Twelve South stand for the MBP. I do some pretty heavy tasks (HD video encoding) in clamshell mode and even though the fans are moving, they hardly ever run at max RPM.
     
  14. dusk007 macrumors 68040

    dusk007

    Joined:
    Dec 5, 2009
    #14
    It is. Open Air can get in and out below the hinge and above it. Air prefers to go up. Closed there is only below the hinge and no dissipation on the really hot part above the cooling blocks.
    My own tests just now web surfing.
    Lid close clamshell mode on a 1080p monitor. Bit web surfing 2010 MBP on a 330M. 5-15% load.
    results in about 2800-3000 rpm at 64-69C
    Open the lid only the 1080p monitor active. After 3 min it is down to 2000rpm at 60C. Big noise difference IMO.
     
  15. canhaz macrumors regular

    Joined:
    Jan 17, 2012
    #15
    I have a similar setup and same issues. Clamshell mode for some reason activates Turbo-Boost and takes the CPU to 3.2GHZ (although it jumps around).

    This might help you.

    http://software.intel.com/en-us/articles/intel-power-gadget-20

    If use it not connected to the TB display, in normal laptop mode, no issues at all. Fan stays around 2000RPM in that case.

    Turbo Boost in clamshell is evil. It's unnecessarily heats up the machine.
     

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