Mac Pro Fan revs to 1500+ at boot

Discussion in 'Mac Pro' started by RoastingPig, Aug 20, 2013.

  1. RoastingPig macrumors 68000

    RoastingPig

    Joined:
    Jul 23, 2012
    Location:
    SoCal
    #1
    Hey my mac pro 5.1 3.2 has a problem where the expansion fan revs to 1500+ at startup just right after the apple logo shows and as soon as it hits desktop the fans take about 20 seconds to go down to the idle 800rpm..its really annoying because it sounds like airplane engine. any suggestions? this dosen't happen in restarts tho only boots from shutdowns. i air spray my machine monthly so the fans are clean
     
  2. derbothaus macrumors 601

    derbothaus

    Joined:
    Jul 17, 2010
    #2
    It's most likely your video card. My EVGA GTX 680 does it as well but only after I upgraded. My original 5870does not exhibit this.
     
  3. Studio K macrumors 6502

    Studio K

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    Feb 17, 2013
    Location:
    United States
    #3
    my first thought was the video card, but it appears from your post that you are using the stock Radeon 5770 card. Is this the case?
     
  4. RoastingPig thread starter macrumors 68000

    RoastingPig

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    #4
    I am using everything stock on this machine. I just did the smc reset and still the rev.
     
  5. phoenixsan macrumors 65816

    phoenixsan

    Joined:
    Oct 19, 2012
    #5
    I got.....

    between 1200-1600 revs in my Mac Pro when booting up. Dig some into the software and found a lot of startup items. I erase all but the estrictly needed....



    :):apple:
     
  6. RoastingPig thread starter macrumors 68000

    RoastingPig

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    Jul 23, 2012
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    #6
    i was excited about that idea untill i seen i only had itunes helper enabled:(

    ----------

    fresh installs of mt lion doesn't solve this...do you guys have 800rpm expansion fan idle with other gpus or things in your pcie expansion slot, my pro dosen't plays well with usb 3 cards or a evga gtx670 because the fans still rev and they idle at 1200rpm which is noticeable when having anything else but a stock machine.
     
  7. ActionableMango macrumors 604

    ActionableMango

    Joined:
    Sep 21, 2010
    #7
    You keep mentioning this problem in so many threads. This new thread, the USB 3.0 thread, a video card thread, and the "what's in your PCIe slots" thread.

    But you aren't providing all the information. There's little pieces here and there. It is really challenging to help when you hide information all over the place.

    So last I heard, in a different thread, these two solutions worked for you:

    1) "the only thing that works is removing the card. i might just remove and install whenever im i need of fast usb 3.0 goodness."

    2) "*UPDATE i removed a 4gb stick of OWC 1066 ram and the fan rev went away."

    Did the problem return later even with that hardware removed? Did you reinstall the offending hardware and are hoping for a different solution?
     
  8. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #8
    Did you make sure to check everywhere? You can check the following locations for apps that automatically launch on startup and delete any you don't need/want:
    • System Preferences > Users & Groups > yourusername > Login Items (SL and older: System Preferences > Accounts > yourusername > Login Items)
    • In Finder, click Go > Go to Folder > /Library/LaunchAgents
    • In Finder, click Go > Go to Folder > ~/Library/LaunchAgents
    • In Finder, click Go > Go to Folder > /Library/StartupItems
     
  9. RoastingPig thread starter macrumors 68000

    RoastingPig

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    #9
    it went away that one time i posted to quickly the problem has since returned
     
  10. RoastingPig thread starter macrumors 68000

    RoastingPig

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    Jul 23, 2012
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    #10
    with everything stock in the machine + plus a fresh mt lion install the problem still presists. on the very first boot the fan went bezerk. im thinking hardware problem. the apple store says its normal and they wont service it.
     
  11. derbothaus macrumors 601

    derbothaus

    Joined:
    Jul 17, 2010
    #11
    Sorry. I thought you had issues with the GTX670. I need to read;)
    You did SMC but did you PRAM zap?
     
  12. flowrider macrumors 601

    flowrider

    Joined:
    Nov 23, 2012
    #12
    Taint normal:mad: Mine doesn't act like that.

    Lou
     
  13. RoastingPig thread starter macrumors 68000

    RoastingPig

    Joined:
    Jul 23, 2012
    Location:
    SoCal
    #13
    i know. thats why steven from applecare got a stern talking too over the phone earlier and he set me up with a service appointment where im gonna be talking to a genius and the apple store manager
     
  14. flowrider macrumors 601

    flowrider

    Joined:
    Nov 23, 2012
    #14
    ^^^^Good for you that you pushed. Let us know how it turns out.

    Lou
     
  15. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #15
    PRAM/NVRAM has nothing to do with the OP's issues. Resetting it will not help.
     
  16. derbothaus macrumors 601

    derbothaus

    Joined:
    Jul 17, 2010
    #16
    Well then... It is left to those helpful genius' that will replace your logic board.
     
  17. RoastingPig thread starter macrumors 68000

    RoastingPig

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    #17
    That's exactingly what happened haha
     
  18. Studio K macrumors 6502

    Studio K

    Joined:
    Feb 17, 2013
    Location:
    United States
    #18
    Is your fan speed back to normal with the new logic board? My PCI fan always runs at 800 rpm (when not stressing the GPU).
     
  19. crjackson2134 macrumors 68020

    crjackson2134

    Joined:
    Mar 6, 2013
    Location:
    Charlotte, NC
    #19
    Yes, please do let us know if the problem is finally resolved. Mine actually did something like that when I installed a RocketU USB 3.0 card, but in spite of what others have said, a SMC reset resolved it. Perhaps that was just a coincidence or something. :confused:
     
  20. RoastingPig thread starter macrumors 68000

    RoastingPig

    Joined:
    Jul 23, 2012
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    #20
    I havent got it back but yesturday they called me for permission to go ahead with the repairs for back motherboard and front board because my front headphone jack was very staticky
     
  21. ActionableMango macrumors 604

    ActionableMango

    Joined:
    Sep 21, 2010
    #21
    Wow, I hope you are still under Apple Care. That's some expensive stuff.
     

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