My iMac i7 runs too hot!

[bent christian]

It would be 5mm wide. Enough dust to choke a machine is not going to fall into a 5mm slot especially when it is an exhaust blowing hot air. Remember Physics 101? Heat rises? You can raise an entire balloon carrying people with hot air, let alone a few dust particles.

As I mentioned earlier, with the machine turned off there would be little to no heat to rise.

Dust would fall (inside).

A vent could easily have been added to the top of the machine without taking away from the aesthetics at all. It would add easy access for particles to cover nearly all the components, likely exacerbating heat issues and shortening the life even further.

 

[Hank Carter]

As I mentioned earlier, with the machine turned off there would be little to no heat to rise.

Dust would fall (inside).

A vent could easily have been added to the top of the machine without taking away from the aesthetics at all. It would add easy access for particles to cover nearly all the components, likely exacerbating heat issues and shortening the life even further.

I'm sorry, but that is a ridiculous argument that has nothing to do with reality. Macs have had vents on the top of their cases for decades and it's never been an issue. Previous models of the iMac had vents on the top and dust never was a problem. But like I said if believing that makes you feel better about your purchase than go right ahead. But in engineering terms it's utter nonsense.

 

[bent christian]

I'm sorry, but that is a ridiculous argument that has nothing to do with reality. Macs have had vents on the top of their cases for decades and it's never been an issue. Previous models of the iMac had vents on the top and dust never was a problem. But like I said if believing that makes you feel better about your purchase than go right ahead. But in engineering terms it's utter nonsense.

Dust has always been a problem for any computer system that uses a fan. Bar none. Prior to the 2012 redesign iMacs were not fully sealed units. They are now, which makes mitigating dust entry a very serious concern.

 

[Shamgar]

Dust has always been a problem for any computer system that uses a fan. Bar none. Prior to the 2012 redesign iMacs were not fully sealed units. They are now, which makes mitigating dust entry a very serious concern.

This is all true, and does not help your case. Vacuuming up all nearby dust 8 hours a day matters far more than collecting stray particles drifting into top vents 16 hours a day.

Not being able to effectively clean that dust also doesn't help, so let's add that as another strike to longevity.

 

[bent christian]

This is all true, and does not help your case. Vacuuming up all nearby dust 8 hours a day matters far more than collecting stray particles drifting into top vents 16 hours a day.

Not being able to effectively clean that dust also doesn't help, so let's add that as another strike to longevity.

I find it unlikely that the machine will be vacuuming much dust from a distance of three or four inches. There is no suction on the vent I can feel. It's very weak.

Any fan-driven system will suck in dust. The place that dust is least likely to accumulate is exactly where the vents are currently placed - under the front of the machine. Keep the base clean, wipe off your table once in a while, and the fan is "vacuuming" hardly anything.

 

[Shamgar]

I find it unlikely that the machine will be vacuuming much dust from a distance of three or four inches. There is no suction on the vent I can feel. It's very weak.

Any fan-driven system will suck in dust. The place that dust is least likely to accumulate is exactly where the vents are currently placed - under the front of the machine. Keep the base clean, wipe off your table once in a while, and the fan is "vacuuming" hardly anything.

The fan is constantly moving air. It may not seem like a lot at any given moment, but extrapolate to hundreds and thousands of hours of operation. That's a whole lot more air moved through the vents than the air passively wafting by the top of the machine, and thus more exposure to dust. I cannot recall ever cleaning a device dustier on top than at the intakes.

 

[dyn]

As of the 6th Generation i7, intel is still saying:
"Sustained Core temperature greater than 80C is too hot for ultimate stability, performance and longevity."

And when you look at other CPUs from Intel or other manufacturers you'll find something different Again, in general CPUs are very capable withstanding high temperatures and they are not the only components. That's the main reason why MERs and SERs are now cooled less (and thus will be warmer). So yeah, although your information is correct you are missing the point. It wasn't about exact numbers for every specific CPU model on the planet.

I find it unlikely that the machine will be vacuuming much dust from a distance of three or four inches. There is no suction on the vent I can feel. It's very weak.

There is far more about dust than the clearly visible very large particles. Dust is also very very tiny and lots of tiny can accumulate over time throughout the machine (fan intake is the biggest) and that can cause issues. And it's not just dust btw, it's every kind of particle, even moisture in the air. Other cooling solutions might solve this but they'll have other disadvantages.

 

[Techman515]

Not sure what the concern is. I have a 2015 iMac completely maxed out. There is almost no sound whatsoever. My external hard drives make more noise by far. I am fully satisfied with performance including any noise issues.
[doublepost=1457227584][/doublepost]I am presuming my last post is not going to satisfy people who have issues with the operation or noise of their iMac. Just letting them know that full satisfaction is possible if the want to work with Apple to fix any issues.