Ventilation issue with Retina 15"

Hi,
I bought my Macbook pro Retina 15" on September.. It's my principal work tool, so i'm worried about a problem i have for 3 weeks now (approximately since the last Moutain Lion update, but I'm not sure).
My Macbook was perfectly quiet (as every macbooks), but now, the two fans are ... noisy, they start with the OS and stopped only when I power off the Mac. The noise is equivalent to the one made when I power on 2 virtual machines at the same time before this issue (not a big noise, but quite annoying).
I don't know if the Moutain Lion update is responsible, but i want to know if I'd rather go to an Apple Store now (2500euros, I would ben a little disappointed if my mac was broken, but i prefer controling it), or if anybody had a similar problem, or if it's just the update ... The noise don't seems to be something broken, just fans hight speed.
Thank's for your answers,
Lucas

Please download, install and run iStat Pro to determine fan speeds and temperatures. Post back with a screen shot of the results.
http://www.apple.com/downloads/dashboard/status/istatpro.html

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HT3131 Are there any ventilation issues with running a macbook air in clamshell mode?

Are there any ventilation issues with running a macbook air in clamshell mode?

...that makes sense to me.
but, why do so many MBA users (on this forum and others) claim that ventilation occurs through the keyboard? Is this claim based on an old macbook design?
for example, here's a related discussion (although fairly old):
11-08-2010, 12:16 PM
#6 (permalink)
SP Forsythe
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Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
Quote:
Originally Posted by tHE j0KER
Actually I you shouldn't close the lid while running on an external screen. The keyboard of the Macbook is an air intake for the fan. Close the lid, and it could overheat.
A common misconception of unknown origin. The intake and the exhaust for the cooling fan on the 13" MB and MBP are both located on the rear slot at the base of the hinge. In fact, you can actually see the divider that separates the intake flow from the output flow. If it were through the keyboard crevices, then an awful lot of overheats would result from people using impermeable keyboard covers, as well as Apple's warranty department would be flipping out over the Apple store carrying such covers. iSkin ProTouch FX Keyboard Cover for all MacBooks - Black Printed Keys on White - Apple Store (U.S.)
Does one think that Apple sells these only for use when the Notebook is off??? http://store.apple.com/us/product/TW...co=MTM3OTUwMDE Closing the lid, whilst operating the unit actually results in cooler operation due to reduction in power consumed by operating the display, which in supporting the on-board display generates heat far greater than simply powering the video port..
Does one think that Apple sells these for use only when the MacBook is off? http://store.apple.com/us/product/TW...co=MTM3OTUwMDEApples direction for use is specifically for when using with an external display.
Currently using:
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11-08-2010, 02:34 PM
#7 (permalink)
ajreynol
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Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
once again, I've tried a few of these keyboard covers. the Moshi keyboard cover is the ONLY one I can recommend. the others are too thick or change the keyboard experience too much.
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11-08-2010, 03:34 PM
#8 (permalink)
doh123
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Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
1. Closing the cover will cause more heat. This is not because of covering the keyboard very much (though it does help some heat be retained). It's mainly because of the shape of the hinge and the fact when closed it covers up the back vent a lot more. For the best cooling, it is best to have the screen open. Just run it as a dual monitor, but make the external the Primary monitor, and if you don't want to use the built in, just turn its backlight off and don't use it.
2. The thing you plug into the wall is not a battery charger. The actual "charger" is built into the computer. It knows when to charge and when not to. If the little light on the power plug is amber, then its charging your battery. When its green, its just powering the laptop and NOT charging your battery at all.
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11-08-2010, 03:38 PM
#9 (permalink)
Wolfpup
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Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
I'd leave the lid open, at least partially...yes it may be fine not doing that, but you are making heat dissipate worse, of course could even theoretically hurt the screen.
As for the battery...well there's really only two choices, have it plugged in or not. As others mentioned, you can't overcharge the battery. It can be damaged a bit from heat, but of course the number one thing that's going to damage it is discharging it...so it's a no brainer-use it plugged in whenever possible, and try to charge it whenever possible when it's not plugged in.
11-08-2010, 03:45 PM
#10 (permalink)
SP Forsythe
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Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
Quote:
Originally Posted by doh123
1. Closing the cover will cause more heat. This is not because of covering the keyboard very much (though it does help some heat be retained). It's mainly because of the shape of the hinge and the fact when closed it covers up the back vent a lot more. For the best cooling, it is best to have the screen open. Just run it as a dual monitor, but make the external the Primary monitor, and if you don't want to use the built in, just turn its backlight off and don't use it.
Nope. Apple would disagree with you on that one. Any "closure", which is, when compared to the amount of CFM, is insignificant. In fact, the opening size remains the same. it is only deflected at a slight angle when the lid is closed. Tilt your MBP and see. As well, shutting down the display lowers the heat being generated, even in the lower case. As I said, if it were a problem, Apple would not be selling stands designed to operate your unit in the closed position as the original poster of this thread proposes to do.
Currently using:
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