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  1. #1
    Dual 2.7 G5 Fan Speed - What are these wires??

    Member Since
    Sep 22, 2009
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    Dual 2.7 G5 Fan Speed - What are these wires??
    I understand the constant high fan speed has been a widely talked about subject, but I was wondering if the two pictures I've attached of 2 different wires (which are present at the front of the system) have anything to do with it. Where should they plug in?? Do they even matter. They are located to the left of the speaker/fan combo towards the front of the tower. The wires come up from underneath the logic board.
    I'm not sure if they became loose at some point, but I thought I would ask...

    Any suggestions are greatly appreciated.
    Attached Images Attached Images

  2. #2
    Dual 2.7 G5 Fan Speed - What are these wires??
    pigoo3's Avatar
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    Quote Originally Posted by kevinokev View Post
    I understand the constant high fan speed has been a widely talked about subject, but I was wondering if the two pictures I've attached of 2 different wires (which are present at the front of the system) have anything to do with it. Where should they plug in?? Do they even matter. They are located to the left of the speaker/fan combo towards the front of the tower. The wires come up from underneath the logic board.
    I'm not sure if they became loose at some point, but I thought I would ask...

    Any suggestions are greatly appreciated.
    Those two black wires are for an Airport/bluetooth combo card. In the photo with the yellow circle...there is a slotted bracket slightly down & to the right. That slot is where the card would go.

    HTH,

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  3. #3
    Dual 2.7 G5 Fan Speed - What are these wires??

    Member Since
    Sep 22, 2009
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    Thanks for your reply. I thought I was on to something. I've pretty much given up on why all of my fans are going full bore...

  4. #4
    Dual 2.7 G5 Fan Speed - What are these wires??
    pigoo3's Avatar
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    Quote Originally Posted by kevinokev View Post
    Thanks for your reply. I thought I was on to something. I've pretty much given up on why all of my fans are going full bore...
    Some of the G5 models were known to be really loud...something like 9 fans in there.

    The PowerPC CPU's generate a lot of heat...especially the faster G5 models. You have the dual-processor 2.7ghz model...this was the fastest dual G5 ever produced...and it still relies on fans to cool it.

    Later G5 models switched to a liquid cooling system (plus fans).

    Unless you can "nail-down" a reason for the loud fans...it may be just normal for a G5.

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  5. #5
    Dual 2.7 G5 Fan Speed - What are these wires??
    pigoo3's Avatar
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    2011 13" MBP 2.3ghz, 8gig ram, OS 10.7.5
    Quote Originally Posted by kevinokev View Post
    Thanks for your reply. I thought I was on to something. I've pretty much given up on why all of my fans are going full bore...
    It also depends on what your doing. If your playing a lot of videos, graphics intense games, or messing around on You-Tube...that will generate much more heat than just doing e-mail.

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  6. #6
    Dual 2.7 G5 Fan Speed - What are these wires??
    Chilbear's Avatar
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    Jun 14, 2007
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    2xiMac24 w Parallels 6 (1x White, 1x Aluminum), iPhone 3GS with iOS5
    I also surf on a prepress forum and many with the G5 and high fan noise found out that the motherboard shortly failed them and the technician put it down to overheating. The fans roaring are the systems way of trying to cool itself and this has become a tell all of possible upcoming failure of the motherboard. I might suggest a desk fan pointing into the box (perhaps open the case) to aid the fan and see if it helps.

    The heat issue is THE reason I never bought a G5.

    I am not saying your machine is going to fail, but others who use the G5 in a fast paced graphic shops using the machine heavily have found that these two are definitely linked. Occasional use certainly will extend the life of your machine. Be prepared and backup.

  7. #7
    Dual 2.7 G5 Fan Speed - What are these wires??

    Member Since
    Sep 22, 2009
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    The machine is a capture and layout station and never roared before. I've had our IT guy swap out the power supply (as that is what he thought might fix the problem), but to no avail. I've tried different ram, resetting the button below the ram slots, etc...

    If it goes, it goes, just thought I would ask as it sounds like a wind turbine.

  8. #8
    Dual 2.7 G5 Fan Speed - What are these wires??
    pigoo3's Avatar
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    2011 13" MBP 2.3ghz, 8gig ram, OS 10.7.5
    Quote Originally Posted by kevinokev View Post
    The machine is a capture and layout station and never roared before. I've had our IT guy swap out the power supply (as that is what he thought might fix the problem), but to no avail. I've tried different ram, resetting the button below the ram slots, etc...

    If it goes, it goes, just thought I would ask as it sounds like a wind turbine.
    Makes sense that if it was "less loud" in the past...and more loud now...that something has changed.

    Is this computer:

    - being used differently than before (different computing tasks)?
    - being used more (more hours continuously)?
    - or has the hardware been changed (more ram, extra hard drives, different or 2nd video card, etc.)?

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  9. #9
    Dual 2.7 G5 Fan Speed - What are these wires??

    Member Since
    Apr 09, 2009
    Location
    Ithaca NY
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    13 inch alMacBook 2GHz C2D 4G DDR3, 1.25GHz G4 eMac
    This is kind of a stupid question, but... the plastic piece on the side of the case that guards your internal components is properly in place, right? Otherwise, your fans will rev at full speed all the time.

  10. #10
    Dual 2.7 G5 Fan Speed - What are these wires??

    Member Since
    Sep 22, 2009
    Posts
    4
    That's not a stupid question, that would be a valid reason. Unfortunately the contact point is working on the dust cover. Beats me ;(

  11. #11
    Dual 2.7 G5 Fan Speed - What are these wires??
    harryb2448's Avatar
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    Have you ever given the G5 a really good clean out, removing fans etc? Dust is a real enemy of G5 machines. Pay particular attention to the front inlet near the front leg. You should be able to fell a gentle breeze going in to the machine.

    Also check out System Preferences > Energy Saver > Options and make sure "REDUCED" or "AUTOMATIC" have been selected on Processor Performance. Selecting "HIGHEST" can cause fan problems.

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