Mac Pro 4.1 Booster fan speeds

Discussion in 'Mac Pro' started by tayh, Apr 10, 2014.

  1. tayh macrumors member

    Joined:
    Nov 10, 2012
    Location:
    Copenhagen
    #1
    Hi all!

    I just got a Mac Pro 4.1, everything works, but I think the booster fans have some issues.

    The Booster fans start at 1100 rpm, and after some time it goes up to 1600 rpm ( No stress on the CPU ).

    I cant stand the sound of the fans, and I think something is wrong. I tried to reset SMC and PRAM with no luck.

    My next try is to remove dust, I hope that works!

    is my rpm's normal??? What do you guys think.
     
  2. CASLondon macrumors 6502a

    Joined:
    Apr 18, 2011
    #2
  3. tayh, Apr 10, 2014
    Last edited: Apr 10, 2014

    tayh thread starter macrumors member

    Joined:
    Nov 10, 2012
    Location:
    Copenhagen
    #3
    Thanks for the reply.

    With no applications open the rpm just gets higher and higher up to around 1600rpm

    In SMCcontrol i can only make the Fans go faster now slower, I will try to post a screenshot.

    Maybe I should try a clean install, I just took the harddrive from my old Mac Pro over to the New one and startede the computer, everything seems to work, i just have this small fan problem.
     
  4. Studio K, Apr 10, 2014
    Last edited: Sep 14, 2017

    Studio K macrumors 6502

    Studio K

    Joined:
    Feb 17, 2013
    Location:
    United States
    #4
    1100 rpm is the normal 'idle' fanspeed for BOOST fans on dual-CPU mac pro.

    1600 rpm does not seem normal without any stress on the processors. Are the other fans speeding up, as well? What are the speeds of INTAKE and EXHAUST?
     
  5. tayh thread starter macrumors member

    Joined:
    Nov 10, 2012
    Location:
    Copenhagen
    #5
    I will check when im off work. But As i remember the other fans was pretty normal in terms of rpm.
     
  6. flowrider macrumors 601

    flowrider

    Joined:
    Nov 23, 2012
    #6
    I'm running a 5,1 with dual W5590s and a GTX 780 so it would run a wee bit hotter than stock. I was using SMC FanControl but recently switched to Mac Fan Control because of this thread:

    http://forums.macrumors.com/showthread.php?t=1340705&highlight=fan

    And, I do like it better.

    I don't think the OP has an issue, but fan control software will allow him to regulate the fans himself.

    I screen shot of my fan speeds are attached.

    Lou
     

    Attached Files:

  7. tayh thread starter macrumors member

    Joined:
    Nov 10, 2012
    Location:
    Copenhagen
    #7
    Thanks for your reply. If I turn on the computer and wait 20 min. The booster rpm will slowly get higher and higher, I think that's weird. Maybe I have a dust problem??
     
  8. Studio K macrumors 6502

    Studio K

    Joined:
    Feb 17, 2013
    Location:
    United States
    #8
    It does seem weird.
    I don't have the dual-socket, though. My experience is with the single-socket 4,1. Default fan speed for BOOST is 856 rpm. And it never goes higher unless the CPU cores are within 2C of ProcHot (according to iStat). ProcHot is likely 100C, and the quad-core Nehalem chips reach that temp easily under full load.

    If you are not maxing your CPU cores, then I would not expect the fanspeeds to rise. The BOOST rises along with the EXHAUST and INTAKE, so please report what those fanspeeds are. If they remain at their minimums (600 rpms) while the BOOST rises, then that would be really strange.
     
  9. jenzjen macrumors 68000

    Joined:
    Aug 20, 2010
    #9
    download opengl extensions viewer from the app store

    restart your machine and then open this app and run a test or 2

    do you fans settle down?
     
  10. tayh thread starter macrumors member

    Joined:
    Nov 10, 2012
    Location:
    Copenhagen
    #10
  11. 0x2102 macrumors member

    Joined:
    Feb 1, 2014
    #11
    Get "Macs Fan Control.app" and change those 2 from "auto" to "sensor based"

    1.) PCI Fan: based on PCIE ambient: Start 36C Max 55C

    2.) PS Fan: based on PSU1 Secondary ...: Start 52C Max 90C

    You might need to tweak the settings a bit but I like it quite.

    Then add Macs Fan Control.app to you login items

    Done.
     
  12. jenzjen macrumors 68000

    Joined:
    Aug 20, 2010
    #12
  13. tayh thread starter macrumors member

    Joined:
    Nov 10, 2012
    Location:
    Copenhagen
    #13
    I just tried Macs Fan Control with your settings, for now it helped! I'll how it goes through the day tomorrow :)

    I will keep you updated, thanks for the help everyone!!!:)
     
  14. tayh thread starter macrumors member

    Joined:
    Nov 10, 2012
    Location:
    Copenhagen
    #14
    Looks like everything is good now, thanks to Mac fan control.:)
     

Share This Page