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Apple Computing Products:
macOS - Desktop Hardware
yet another imac 27" i5 overheating question
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<blockquote data-quote="cwa107" data-source="post: 1188816" data-attributes="member: 24098"><p>The term "overheating" is too often misused. Overheating would mean that the machine is operating well out of spec - and in those scenarios, it will turn itself off. Just by virtue of the fact that it hasn't crashed during any of these sessions would seem to indicate that it's not overheating.</p><p></p><p>Seeing as how you mentioned that you had your fans "cranked up to nearly max rpm", I'm going to guess that you've installed something like smcFanControl. My advice would be to get rid of it and let the SMC handle fan speeds on its own as it was designed to do. They are thermostatically controlled and the thresholds were devised by the very same engineers who designed the cooling system of your machine. There is no need to "second guess" them as it were... this is not an overclocked custom-built gaming rig. </p><p></p><p>I think a lot of people fall into this trap because the Macs tend to have aluminum enclosures which can act as a heatsink (and very much intentionally so). Just because it's warm to the touch doesn't mean there is something wrong. </p><p></p><p>If you really feel the need to intervene in some way, grab yourself a can of compressed air and give the vents a few short bursts of air now and then to clear any dust accumulation.</p></blockquote><p></p>
[QUOTE="cwa107, post: 1188816, member: 24098"] The term "overheating" is too often misused. Overheating would mean that the machine is operating well out of spec - and in those scenarios, it will turn itself off. Just by virtue of the fact that it hasn't crashed during any of these sessions would seem to indicate that it's not overheating. Seeing as how you mentioned that you had your fans "cranked up to nearly max rpm", I'm going to guess that you've installed something like smcFanControl. My advice would be to get rid of it and let the SMC handle fan speeds on its own as it was designed to do. They are thermostatically controlled and the thresholds were devised by the very same engineers who designed the cooling system of your machine. There is no need to "second guess" them as it were... this is not an overclocked custom-built gaming rig. I think a lot of people fall into this trap because the Macs tend to have aluminum enclosures which can act as a heatsink (and very much intentionally so). Just because it's warm to the touch doesn't mean there is something wrong. If you really feel the need to intervene in some way, grab yourself a can of compressed air and give the vents a few short bursts of air now and then to clear any dust accumulation. [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
yet another imac 27" i5 overheating question
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