Safe running on only one fan temporarily?

Discussion in 'MacBook Pro' started by AlphaDogg, Jan 6, 2013.

  1. AlphaDogg macrumors 68040

    AlphaDogg

    Joined:
    May 20, 2010
    Location:
    Boulder, CO
    #1
    One of the fans in my 15" MBP was running kind of loud, so I took the computer apart and pulled out the offending fan. I tried pulling the fins off of the motor to lubricate the pin on which the fins rotate, but I broke the fins in doing so. I ordered a new set (both fans) off of ebay and I'll have them within the week. In the meantime, I've installed SMCfancontrol so I can ramp up the fan to 6200RPM until I get the new fans in there. I'm wondering if this is safe to do? Keep in mind the 9600M GT's in these machines are bound to fail. Running the fans at 6200RPM, the computer is actually 15ºF cooler than it was running at 2000RPM with two fans.

    Here's the broken fan:
    [​IMG]

    You can see where the pin joined the plastic, the plastic just broke.
     
  2. A Hebrew macrumors 6502a

    A Hebrew

    Joined:
    Jan 7, 2012
    Location:
    Minnesota
    #2
    Nothing bad should happen, it'll shut off before it overheats.
     
  3. AlphaDogg thread starter macrumors 68040

    AlphaDogg

    Joined:
    May 20, 2010
    Location:
    Boulder, CO
    #3
    I know that, but I'm worried about the 9600M GT because it won't cause the computer to shut down. The computer will only shut down when the CPU hits 110ºC, but I'm worried that the point at which the computer will shut off is higher than the point at which damage will start to set in on the 9600M GT.
     
  4. calderone macrumors 68040

    calderone

    Joined:
    Aug 28, 2009
    Location:
    Seattle
    #4
    I think you know the answer, but of you want to use it, do t do anything graphically intense.
     
  5. bill-p macrumors 65816

    Joined:
    Jul 23, 2011
    #5
    Or alternatively, just use gfxCardStatus to force the 9600M GT to turn off and use the 9400M instead until your fan arrives.

    I don't think it'll produce any heat when it's turned off.
     
  6. ezramoore macrumors 6502a

    Joined:
    Mar 20, 2006
    Location:
    Washington State
    #6
    You don't say which MBP you have, but in most Apple products if there is more than one fan, they cool different things, rather than just doubling up on cooling capacity.

    Don't do it.

    P.S. You cannot lubricate fans like the ones found in computers, they are closed systems.
     
  7. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #7
    Let me say that apple put two fans into the laptop for a reason. Will it run on a single fan, sure but apple isn't about to extra fans in for giggles, its there because its needed. I'd not doing anything intensive because the air flow has been impacted greatly be the removal of the fan.

    I'd look on google for a fan replacement.
     
  8. Queen6 macrumors 603

    Queen6

    Joined:
    Dec 11, 2008
    Location:
    Enjoying Better Things
    #8
  9. Brian Y macrumors 68040

    Joined:
    Oct 21, 2012
    #9
    Install GFXCard status and put it on "integrated graphics only" mode. This will stop the 9600M problem, and will run it from the integrated 9400M :).

    But Id highly recommend getting a second fan as soon as possible, and not using it for anything intensive in the mean time.
     
  10. AlphaDogg thread starter macrumors 68040

    AlphaDogg

    Joined:
    May 20, 2010
    Location:
    Boulder, CO
    #10
    I set energy saver to do this (look at the graphics part):
    [​IMG]
    Isn't that the same thing?

    I reapplied thermal paste in this MBP the day after I got it (Friday). The heatsink has two parts which allow the two fans to pass air through it. It's one heatsink with two heatpipes running on each chip (9400M, 9600M GT, CPU), so having two fans just doubles up on its cooling capacity. Everyone else was able to figure out which MBP I have from my signature, why couldn't you? Also, I was able to lubricate the right fan, so don't tell me they're closed systems.
    I'm not sure if you saw, but I mentioned that I have two new fans on order and I'll have them by the end of the week.
    Thanks. Your post gives me confidence that nothing bad will happen. And iirc, those early 2008 15" MBP's also had the 9600M GT.
     
  11. justperry macrumors 604

    justperry

    Joined:
    Aug 10, 2007
    Location:
    In the core of a black hole.
    #11
    I use this next to my powerbook, yes it help, I am not joking, but I am in a hot climate.
    Without 60-64 celsius
    With 50-54 celsius

    Sorry for the big image, can't find a smaller one.
    Edit: 6" fan, paid about 4 Euro's for it.

    [​IMG]
     
  12. bill-p macrumors 65816

    Joined:
    Jul 23, 2011
    #12
    No. You must use gfxCardStatus if you want to disable the dedicated graphics on any 15" MacBook.

    Also the latest version of gfxCardStatus may switch back to dGPU with certain apps, so make sure you don't run anything more intensive than Safari, Mail, etc...
     

Share This Page