Snow Leopard and 3870 Fan Noise every 71 seconds

Discussion in 'macOS' started by smitha96, Aug 28, 2009.

  1. smitha96 macrumors regular

    Jan 11, 2005
    I just upgraded to Snow Leopard on my Mac Pro 2.66ghz fall 2006 and my 3870 graphics card's fan spins up to the max (like an airplane) on the dot every 71 seconds. Any suggestions?

    I never had this problem under 10.5.

  2. SilentPanda Moderator emeritus


    Oct 8, 2002
    The Bamboo Forest
    No idea but my 3870 is acting just normal. I did a clean install.
  3. seano11 macrumors newbie

    Aug 29, 2009
    I'm have a similar problem. I have the same setup as you and my card's fan runs at a very high rate. I idea how to fix it.:(
  4. mc123 macrumors newbie

    Sep 1, 2009
    I've got a similar problem on my Mac Pro v1.1 2.66 with radeon 3870. All was fine in leopard 10.5, but now that I installed Snow Leopard, my fan is ALWAYS running at full speed.

    I did an upgrade-install of Snow Leopard.

    smitha96 and seano11, did you do you an upgrade or clean install?
  5. seano11 macrumors newbie

    Aug 29, 2009
    I did an upgrade and install frist and had the same problem you did.* When I did a clean install to get rid of that problem the noise went away, but the card ran very slow and launching a 3d game would give an error saying that 3d acceleration could not be started.

    I finally had to downgrade to a 1900, which works as it should. The disc that came with the 3870 will not install any drivers, even though it will not show an error and even makes you restart.

    *It didn't literally run at full speed, but much higher then it should, I booted into Leopard to compare.
  6. evadeht macrumors newbie

    Sep 10, 2009
    Same problem with a 1900

    I have an ATI Radeon X1900 and I just upgraded to 10.6. It appears that my fans are running at full strength, very noisy.
    Also my machine isn't responding to any fan control programs, like SMC Fan Control.

    Any advice how I might get my machine back in a quieter usable state. I'm a video editor and I can't think above the din.
  7. cjonesva macrumors newbie

    Sep 12, 2009
    After an hour on phone support with Apple and the solution was to take in to the apple store I used this work around until a future update is available.

    Download and install fan control

    adjust base speed to 1000 RPM
    Lower Threshold to 40. c
    Upper Threshold to 70 c

    my desktop (mac pro) usually runs between 35 and 42 degrees c
    after a few seconds the fan spun down and only kicks in when the temp reaches the lower threshold of 40 degrees C
  8. MrMetro macrumors newbie

    Sep 13, 2009
    Fan update

    OK.. Im back..

    After about a cool hour with Apple Tech support specialist, we booted into safe mode which seemed to solve the issue, but we cant do that everytime. SO, we removed my startup items, which solved nothing.. Then I cam up with an idea and disabling my CARBONITE ONLINE BACKUP, and WHAM! CPU temp dropped to 55 c and fans ran a normal 1800-2000 rpm.

    In my case, it seems to be a CARBONITE issue.. In others, it must be a third party application.

    How many users that have this problem are using Carbonite???

    Ill keep you up to date on the progress, but as for now, this issue is resolvedfor me..

    Make sure you all do the SVN and PRAM resets first if you having this issue.


  9. minorOffense macrumors newbie

    Feb 24, 2011
    Carbonite daemon

    I've got the same issue here. When Carbonite is running, the CPU shoots up in power/temp and the fans spin up.

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