11-inch closed all the time w/monitor & temps

Discussion in 'MacBook Air' started by jabalczar, Sep 20, 2013.

  1. jabalczar macrumors member

    Jul 22, 2011

    I prefer to use a large screen for around 95% of the time. If I power a 27-inch Apple display with my 2012 11-inch Air shut, is the Air more likely to degrade quicker over time (i.e. the motherboard fail etc) due to higher temps with the the screen shut.
  2. Boyd01 macrumors 68040


    Feb 21, 2012
    New Jersey Pine Barrens
    I use a big screen most of the time myself (unless travelling). I don't know whether the higher temps will cause any damage, but the fan noise bothers me so I leave it open and just turn the brightness all the way down. The fans are almost never noticeable with the lid open but they kick in pretty quickly with it closed.
  3. Chicane-UK macrumors 6502

    Apr 26, 2008
    I just got my 11" Air yesterday, and am using it with an external 23" Cinema Display. So far I've found it runs a lot cooler (even when being worked quite hard) without the display on & the lid closed.. so I reckon if anything it'll probably last longer.
  4. mayuka macrumors 6502a


    Feb 15, 2009
    I had different experiences with the 23" display. The temperature generally is 2°C higher than without display. I used Macs Fan Control for monitoring.
  5. GGJstudios macrumors Westmere


    May 16, 2008
    Any difference in lifespan between operating in clamshell mode or with the lid open is not significant enough for you to notice it. You will most likely replace your MBA with a newer model long before you notice any failure due to heat. While there is some heat dissipation in all directions, the primary heat removal is through the vents, located at the back of your MBA near the hinge. These vents are unobstructed with the lid open or closed. All Apple notebooks are designed to operate safely with the lid closed in clamshell mode.

    If you're not already doing so, use iStat Pro (free) or iStat Menus ($16) to get accurate readings of your temps, fan speeds, etc., rather than relying on your sense of touch or sound. A forum member has posted a copy of iStat Pro that has been "tweaked" to enhance compatibility with Mountain Lion. You can download it here.
    The Intel processors used in Macs are designed to automatically shut down to prevent damage if they truly overheat. CPU Tjmax = 105C (221F), GPU Tjmax = 100C (212F) on i3, i5, i7 processors. (Source: Intel)
    Unless there is a rare defect in a Mac, most temps are well within the normal operating range, considering the workload being put on it. Websites with Flash content, games and other multimedia apps will put higher demand on the CPU/GPU, generating more heat. This is normal. If you're constantly putting high demands on your system, such as gaming or other multimedia tasks, expect temps to rise and fans to spin up accordingly. It's just your Mac doing its job to maintain temps within the normal range.
    It is also quite normal for your Mac to become extremely hot to the touch during intensive operations. The aluminum body transfers heat more effectively than other materials used in computer casings, so you will feel the heat more. This doesn't indicate that it's overheating and will not harm the computer to be hot to the touch.
    Your fans are always on when your Mac is on, spinning at a minimum of 2000 rpm (for MBPs) or 1800 rpm (for MBAs, MBs and minis), or 1200 for the newest MBAs. Older iMacs have 3 fans with minimum speeds in the 800-1200 range, while the newest iMacs have a single fan, spinning at a minimum of about 1400 rpm. They will spin faster as needed to keep temps at a safe level. If your fans are spinning up without increased heat, try resetting the SMC. (PRAM/NVRAM has nothing to do with these issues, so resetting it will not help.)
    The intake and exhaust vents are in the back of the computer near the hinge on all Mac notebooks (except the new MBP with retina display, which has intake vents along the sides at the bottom). The iMac vent is a slot on the back near the top of the computer. Make sure the vents remain unblocked to allow your computer to perform at its best. For Flash-related issues:
  6. John Culter macrumors newbie

    Apr 24, 2013
    27" Apple Thunderbolt display almost 95% of the time.

    2012 MBA 11" with HD4000 turns on fans almost all the time when lid closed
    2013 MBA 11" with HD5000 is super cool, no fans, temperature same when opened or closed.
  7. fedecape macrumors 6502


    Oct 23, 2011
    Miami, FL
    How can I leave the lid open but the display off? If I decrease the brightness I'll be.. well, just decreasing the brightness.. the display will still be on and stealing GPU resources, right?

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