Lion and the FANS

Discussion in 'Mac OS X Lion (10.7)' started by bruleke, Nov 22, 2011.

  1. bruleke, Nov 22, 2011
    Last edited: Nov 22, 2011

    bruleke macrumors 6502

    bruleke

    Joined:
    Jun 26, 2009
    Location:
    127.0.0.1
    #1
    I read in a blog that some people are having problems with the fans after they've installed Lion.
    Seems like they are spinning like a jet engine - because the CPU gets hot frequently.

    Well, I am facing this problem right now.

    What I am using:

    - Google Chrome with only one page (this one);
    - Transmission downloading one torrent (a movie);
    - Skype.

    Thats it!
    75ºC and 5,600 rpm all the time.

    Whats wrong with Lion? I believe this will reduce the lifetime of some components, wont it?

    This is my machine
    Macbook pro 15" mid 2010
    8gb Ram
    7,200 rpm 500gb Black WD
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    The Intel processors used in Macs are designed to automatically shut down to prevent damage if they truly overheat (around 100C/212F - 105C/221F, depending on your processor). iStat Pro will give you accurate readings of your temps, among other things.

    Unless there is a rare defect in your Mac, your temps are well within the normal operating range, considering the workload you're putting 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.

    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). They will spin faster as needed to keep temps at a safe level. If they're spinning up without increased heat, try resetting the SMC. PRAM/NVRAM has nothing to do with these issues, so resetting it will not help. Also, make sure you don't block the vents, which are located at the rear, near the hinge.

    Learn about the fans in your Mac
    Apple Portables: Operating temperature

    Launch Activity Monitor and change "My Processes" at the top to "All Processes". Then look to see what apps may be placing high demands on your CPU/GPU.
     
  3. bruleke thread starter macrumors 6502

    bruleke

    Joined:
    Jun 26, 2009
    Location:
    127.0.0.1
    #3
    Thank you for the explanation!
    I am currently using istat pro, thats how I knew the temperature and fans' speed.

    Well, transmission is using 7,4% of CPU, the rest of apps are using less than 5%.

    The thing is: this situation didnt happen in SL: I could use the same (or even more apps) that my CPU wouldnt get that hot!

    The fans just wont stop! Its been more than 2 hours that they are spinning at 5,600-6,000 rpm speed! There's no flash or 'heavy' content!

    I am worried...
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    Did you reset the SMC, as I suggested?
     
  5. bruleke thread starter macrumors 6502

    bruleke

    Joined:
    Jun 26, 2009
    Location:
    127.0.0.1
    #5
    Yes! :(
    I did that before your post
     
  6. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #6
    Try closing apps, one at a time, and monitor the fans and temps. I'd start with Skype. Keep doing so until the fans and temps drop. That should help identify the culprit.
     
  7. bruleke thread starter macrumors 6502

    bruleke

    Joined:
    Jun 26, 2009
    Location:
    127.0.0.1
    #7
    Thank you a lot for the support!
    Will do that in a few minutes - dinner in the stove! eheh
     

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