Low Temps Crazy Fan

Discussion in 'MacBook Air' started by Applefanatic46, Jul 27, 2011.

  1. Applefanatic46 macrumors newbie

    Jan 20, 2011
    I just got a new 13" MBAir and i love it. Its got the i7 and Samsung ssd/display. My problem is that whenever i use youtube the fan goes insane. I've tried chrome, firefox and safari and am currently using safari with click to flash and flash installed. Whenever I go on Youtube, after a minute or so, i'll see 6k+ fan speeds. Is anybody else seeing this as well? This happens with flash and click to flash H.264. The back part of the machine where the fan is gets really warm as well. The temps stay low but the fan just runs like mad even after closing safari and just letting it sit idle.
  2. Obscurelight macrumors 6502

    Jul 22, 2011
  3. Gemütlichkeit macrumors 65816


    Nov 17, 2010
    i lol'd
  4. HiRez macrumors 603


    Jan 6, 2004
    Western US
    I'm noticing the fan is very aggressive on my 13" i7 Air (don't know if it's the hardware, or Lion, or both). It comes on and ramps up quickly to keep temps under control, but it also spins down fast when CPU cycles drop (usually within a few seconds). It's a tradeoff I guess, even under heavy load like World of Warcraft, it runs lot cooler than my early 2010 MacBook Pro, which will literally burn bare skin on the bottom.
  5. Applefanatic46 thread starter macrumors newbie

    Jan 20, 2011
    I'm gonna try the fan reset. The thing is that it doesn't just ramp down. Once i closed Safari it took close to a minute to get to 2200ish levels. The cpu temps were low, so i don't think that it was because it was trying to cool stuff down. The bottom of the laptop was really warm so it might be that the fans were just going overtime to keep the temps real low.
  6. Applefanatic46, Jul 27, 2011
    Last edited: Jul 27, 2011

    Applefanatic46 thread starter macrumors newbie

    Jan 20, 2011
    It Worked!

    I reset the SMC and it worked perfectly. I watched a 13ish minute 1080p youtube video in H.264 and the fan was at 2k and temps 55-65*. With a 16min 720p flash youtube video the temps jumped around from 55-72* and the fan went from 2000-3200 along with the temps. Even with flash the temps only peaked for a minute or so about 1/4 of the way into the video. Thanks for the suggestion, I had totally forgotten about the SMC reset and was thinking that 6000+ fan speeds weren't normal.
  7. Applefanatic46 thread starter macrumors newbie

    Jan 20, 2011

    The fans are at it again. It's mostly happening with video, both flash and h.264, but this time temps are up too. During some Youtube videos in 720p H.264 i was up to 80*c and the fans got up to 5500 rpm at one point. Hopefully Apple will release an update that will help keep the fan/temps under control.
  8. maclook macrumors 65816

    Nov 2, 2008
    Is this really something that can be fixed?
    Under some fairly heavy use, The temps can jump to 80-90 and fans run at 5000+. At first I thought this was unusual, but I'm inclined to believe this is just the design. The fans are loud and the computer is hot but this seems like something I have to get used to, rather than waiting for a "fix".
  9. iphonsteve4ajob macrumors regular

    Aug 6, 2011
    Saw your post and I loaded a couple of YouTube vids. Flash and h.264. Watched both for about 10 minutes. Cpu temp hovered around 55C, usage at 5%, fans 2K. I toggled back and forth between full screen mode to see if that made a difference and nothing. I'm running a 13" i5.

    The only time I see temps and rpm's like that are watching Netflix vids. Usually 20-30% cpu usage w/ fans at 4-5K, cpu temp 70C.
  10. JonLa macrumors 6502

    Dec 22, 2009
    Post the browser and flash version you're using?
  11. rbn macrumors member

    Jul 8, 2010
    where is the laptop sitting?

    sometimes i find that even if my CPU temps are low, my fan speeds ramp up when my enclosure temps are above 36 degrees C.

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