Any fans inside 27" 2015 iMac?

Discussion in 'iMac' started by ejemplo1111, Dec 22, 2016.

  1. ejemplo1111 macrumors newbie

    Joined:
    Sep 27, 2015
    #1
    hello everyone
    I was wondering , is there a fan inside the late 2015 iMac with SSD? And for that matter , is there one on a FUSION drive as well ? I just can't hear it no matter how hard I push it . Just a thought

    Thanks for reading
     
  2. gian8989 macrumors regular

    Joined:
    Oct 23, 2015
    #2
    Yes. If you want to be sure if your fan is working try to download a software to manually increase fan speed. I would have tried with something like cinebench to push the imac but before doing any damage check if the fan is working.
     
  3. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #3
    One example of software that can both show the fan speed, and allow you to change the speed (you will hear it at max speed :D ) is SMCFanControl
     
  4. ejemplo1111 thread starter macrumors newbie

    Joined:
    Sep 27, 2015
    #4
    Got it, thanks for the replay, i guess All imacs have some type of fan inside, i just thought the SSD version did not have it since there is no spinner to cool down
     
  5. ljonesj macrumors 6502a

    ljonesj

    Joined:
    Oct 20, 2009
    Location:
    Kingsport TN
    #5
    The CPU would still need the fan to keep cool even thought it would have a ssd and it's the same for the gpu
     
  6. MinEderPlayz macrumors 6502a

    MinEderPlayz

    Joined:
    Aug 3, 2013
    Location:
    Hamburg, Germany
    #6
    Yes CPUs and GPUs generate gigantic amounts of heat when you consider how small they are. There are fans in the 27" iMac but Apple's configuration does make it pretty hard to hear them during normal use.
     
  7. VanNess macrumors 6502a

    VanNess

    Joined:
    Mar 31, 2005
    Location:
    California
    #7
    I'm impressed with how quiet the late 2015 iMac 27 is. I have the 4 ghz version and fusion drive and it's as silent as an iPhone or iPad in regular use. My external TB drive which I consider to be otherwise very quiet makes infinitely more noise in use than the iMac. The only time I've heard the iMac's fans was transcoding in Handbrake. But that app pegs the CPU, all cores with hyper-threading.

    Once Handbrake is done though he fans rev down just as fast as they reved up so it's only momentary (and the fans aren't that loud - but they do sound front and center). Since Handbrake throws so much CPU power at transcoding it's very fast at finishing a transcode so again it's only momentary for the fans.
     
  8. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #8
    Check out iFixit tear down the iMac uses a fan to cool the interior as it does not depend on passive cooling like the MacBook
     
  9. ThisBougieLife macrumors 65816

    ThisBougieLife

    Joined:
    Jan 21, 2016
    Location:
    SF Bay Area, California
    #9
    I heard the fan on the 21" 4K iMac rev really high when I'd flip through photos on Photos. I'm assuming that was because of the lack of dGPU, but I never did get to the bottom of that (and I no longer have the computer, so can't run more experiments).

    I might be buying a 27" iMac if I decide to return my MBP. Do the fans rev when browsing Photos? I thought that was pretty pathetic on the 21" and am hoping it doesn't happen as well on the 27".
     
  10. curtvaughan macrumors regular

    curtvaughan

    Joined:
    Dec 23, 2016
    Location:
    Austin, TX
    #10
    On the two 21" iMacs I've owned (a 2010 and then a 2014) fans began to rev up more often after about 18 months, the problem being that dust had begun to accumulate over the vent holes (one on bottom of machine, the other on the rear behind the stand. Since the iMac internal hardware is fairly tightly packed it is fairly susceptible to overheating if the vents are clogged. Vacuuming out the vents periodically fixed the noisy fan issues for me.
     
  11. MinEderPlayz macrumors 6502a

    MinEderPlayz

    Joined:
    Aug 3, 2013
    Location:
    Hamburg, Germany
    #11
    They do not, at least for me. Though I have the M395/6700K combo so photos is fairly light load for them.
     

Share This Page