It doesn’t look (at iFixit, disclaimer: no ad, money or gift involved) that the body part that I am now covering with felt is part of a convection cooling scheme, since the fan seems to suck the air from the logic board directly. Your machine may get overheated if the opening is cluttered but then it should of course shut down. I hope!ĭisclaimer: you do this at your own risk. Great! I fear that in an office they will laugh at you. ![]() I can feel it on wet fingers.įor me, I don’t see it. It feels like the iMac runs the fan at even lower speed when it’s idle. ![]() (But I had to replace the fan a couple of years ago.) It’s just that my ears aren’t that close. (Apple burnt their reputation once on passive cooling with the Power Mac G4 Cube.) Even my “silent” 2008 Mac Mini with CD drive that we have in the living room by the TV gives more noise at idle. And the cooling design may not allow for no forced air. It may be worse with the appearing sound if the fan were to start up from stand still. But I guess it’s next to impossible to make it noiseless as long as the fan runs. I was actually surprised to learn that the fan was audible. Now I can code with ease, with no distraction from the Apple designers. I was surprised now to almost hear only the background noise. Then just pushed the whole unit into the space above the cable. I cut an opening for the air and then I sowed the ends together at the top, to avoid sound from leaking up. I searched town and used the thickest and heaviest felt I could find, a placemat of 4 mm thickness. So I tried a kind of wider “tube” instead. Maybe some sound still came out of the machine to the sides and was reflected by the desk and wall behind? It dampened the sound, but I thought I could try to do better. But it was above.Īt first I tried to use some thick felt I had in the foot, from the top, down to the cable and into the body, the size of the foot. ![]() It was just above the decibel level of the background noise in my own ears. It didn’t sound like the sound of moving air more like motor sound. I am rather sensitive to this kind of noise. But I can’t place that machine under the table, can I…? So the noise I indeed could hear was as designed by Apple. The speed was about 1200 RPM, which is the machine’s idle speed. I installed smcFanControl (but you won’t need it) just to read the fan speed of my new 2016 iMac 21.5″ “retina” screen desktop machine (type iMac16,2).
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