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Any fans inside 27" 2015 iMac?

E

ejemplo1111

macrumors newbie
Original poster
Sep 27, 2015
19
3
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
 
ejemplo1111 said:
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
Click to expand...

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.
 
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
 
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.
 
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.
 
ejemplo1111 said:
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
Click to expand...

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
 
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".
 
ThisBougieLife said:
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".
Click to expand...

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.
 
ThisBougieLife said:
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".
Click to expand...
They do not, at least for me. Though I have the M395/6700K combo so photos is fairly light load for them.
 
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