Do your Mac Pro fans run constantly?

Discussion in 'Mac Pro' started by milozauckerman, Oct 17, 2006.

  1. milozauckerman macrumors 6502

    Joined:
    Jun 25, 2005
    #1
    Not really a question about the noise (which depends on your sensitivity), but the front fans themselves, visible behind the grille.

    Since applying the firmware update last night after the first software update, my new mac pro's forward fans have been running constantly. Apple Hardware Test doesn't turn up any issues with temperature monitors, and it's 74-75F in this room currently, with a ceiling fan going as well so I don't think ambient temps are at fault.

    Before I go through the process of resetting the SMC (I had my fill with my last G5), I wanted to see if anyone else's fans ran most of the time or all the time.
     
  2. adamda macrumors newbie

    Joined:
    Oct 16, 2006
    #2
    It does seem as if mine do run constantly. But I don't really know the difference between sounds, so it could be the humming of the power supply for all I know... although it does sound like air circulation to me. Running 1.0 SMC Firmware.
     
  3. ljones macrumors regular

    Joined:
    Oct 2, 2006
    Location:
    Atlanta, GA
    #3
    I think they run until the system is placed to sleep or shut down. If you look through the front grill you will see them spinning. Check it randomly, and they will be spinning. I notice when my system is idle for a while the temp drops, lack of CPU use. When i'm working, i have a constant temp, unless i close the door on my desk where the mac pro is resting. Doing so drives the temp up about 20 degrees, lack of air flow.
     
  4. n8236 macrumors 65816

    Joined:
    Mar 1, 2006
    #4
    If you've been following the thread regarding the fan control software which was just newly developed, you would know the fans are on constantly. The default settings on the software indicate that at idle, it runs below 1500rpms which is hardly noticeable in most cases. So, I do believe they are spinning constantly.
     
  5. milozauckerman thread starter macrumors 6502

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    Jun 25, 2005
    #5
    The only fan software I'm aware of is for the Macbook and Macbook Pro.
     
  6. n8236 macrumors 65816

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    Mar 1, 2006
  7. relimw macrumors 6502a

    Joined:
    May 6, 2004
    Location:
    SC
    #7
    I haven't really noticed, but I'm sure they're probably running at constant low as I push my system rather hard. I've only noticed the fans ramp up to high 3-4 times since I got the machine.
     
  8. Transeau macrumors 6502a

    Transeau

    Joined:
    Jan 18, 2005
    Location:
    Alta Loma, CA
    #8
    Yes, they do. The front fans run at 500RPM and the rear fans run at 600RPM.

    I'm not sure about the X1900's RPMs.
     
  9. apfhex macrumors 68030

    apfhex

    Joined:
    Aug 8, 2006
    Location:
    Northern California
    #9
    Yes, the front fans are always spinning when the computer is on and awake. Same before and after the firmware update.

    As for what noise I can hear, not sure if I'm hearing the main fans, the X1900's fan, the hard drive, or some combination thereof. Probably the later.
     
  10. technicolor macrumors 68000

    technicolor

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    Dec 21, 2005
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    #10
    Funny, Ive heard my fans only once since I got this machine. And what was after rebooting 500 kabillion times because it was stuck in a firmware update. :confused:
     
  11. ljones macrumors regular

    Joined:
    Oct 2, 2006
    Location:
    Atlanta, GA
    #11
    I don't really hear my fans. i didn't even notice them until i took it back to the Apple Store and when they checked out my loud ass DVD drive, the lighting in the store visually revealed them as they came to a stop when the system was shut down.
     
  12. TheFuzz macrumors regular

    Joined:
    Aug 18, 2006
    Location:
    LA
    #12
    mine seem to spend continuously too, but i can't hear them over the hard drives. also, what's an ok range for cpu temps? mine seem to stay around 150F+ during video work.
     
  13. ljones macrumors regular

    Joined:
    Oct 2, 2006
    Location:
    Atlanta, GA
    #13

    What app are you using to check your temp? iStat pro doesn't find any sensors, I have some widget at home, but I think it checks the hard drive bay or something.
     
  14. TheFuzz macrumors regular

    Joined:
    Aug 18, 2006
    Location:
    LA
    #14
    i'm not on my machine now, it might be the same one you're using. i'll check when i get home.
     
  15. babsuvulawho macrumors member

    Joined:
    Sep 7, 2006
    #15
    I just took mine out of the box last night but thus far whenever the machine is awake the front fans are definately spinning but at such a low RPM they don't make very much noise at all. When I first turn the machine on all the fans go to a high RPM and the machine is very loud but that stops quite quickly.
     
  16. ljones macrumors regular

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    Oct 2, 2006
    Location:
    Atlanta, GA
  17. minnesotamacman macrumors regular

    Joined:
    Jul 22, 2006
    #17
    I rarely hear my fans kick in. Either that, or they are so quiet I can't hear them when they do kick on.
     
  18. apfhex macrumors 68030

    apfhex

    Joined:
    Aug 8, 2006
    Location:
    Northern California
    #18
    Does it still work for you after the firmware update? When I first got my MP I used it to look at the CPU temp, but now it only displays HDD temp and can't find any other sensors. Temperature Monitor was the only application/widget that could read the MP's temperatures, too. I can only figure it was the firmware update or maybe 10.4.8 that broke it.
     
  19. ljones macrumors regular

    Joined:
    Oct 2, 2006
    Location:
    Atlanta, GA
    #19
    I guess i only get a hard drive temp as well. I didn't download this widget until after the 10.4.8 update and firm ware update. Although, my Mac pro keeps saying download the firmware update in Software update. Run the script, I'm already up to date.
     

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