2009 Bootcamped iMac overheating

stupididiot · Feb 13, 2013, 04:38 PM

I have Core Temp 1.0 installed and it shows the machine shooting straight up to 100 C unless I have a fan blowing across the back of the machine.

I also have MacFan running and it shows the systems fans working at max speed as needed.

So I'm very confused, because this doesn't seem to be a fan driver issue, and this does not happen in the Mac OSX partition.

I'm also not necessarily pushing the machine very hard...

When the fan is blowing across the back it stays cool though.

Any help?

jav6454 · Feb 13, 2013, 04:41 PM

What is the rpm (speed) of the fan when Windows is running? Also, what programs are running at startup?

simsaladimbamba · Feb 13, 2013, 04:42 PM

If the iMac would overheat, it would shut down, to prevent actual overheating.
Anyway, what are you actually doing during those high temperature times and what are the fans' speeds?

Since you did not specify the actual iMac you have (there were several options in 2009 ranging from C2D via i5 to i7 CPUs), maybe this can help: Those Macs in their heat - a sine of over-heating? - a short story by Mister GGJstudios

stupididiot · 05:03 PM

That's when the core0 temp is around 89 C

CPU is Core 2 Duo E7600

I'm doing anything from transcoding (which kicks the CPU to 100%) or just letting it idle. It will always eventually shut down to prevent over heating

simsaladimbamba · Feb 13, 2013, 05:00 PM

Quote:

Originally Posted by stupididiot

Image

That's when the core0 temp is around 89 C

CPU is Core 2 Duo i5 E7600

I'm doing anything from transcoding (which kicks the CPU to 100%) or just letting it idle. It will always eventually shut down to prevent over heating

It seems the fans stay at idle speed, thus the high temperatures.
I do not know of any reliable Windows fan speed control application, but many seem to use SMC Fan Control in Mac OS X and set the fans' speed to the fullest and then switch to Windows.

PS: A Core 2 Duo (C2D) is not an i5. The E7600 is a C2D.

stupididiot · Feb 13, 2013, 05:11 PM

Thanks for the correction.

I'm using MacFan now to increase the fan speeds manually, we'll see how it goes

stupididiot · Feb 13, 2013, 06:07 PM

It's working well!

I guess the fans weren't working properly after all.

My only remaining concern is that I don't know which fans are which. Can anyone advise me as to how to figure that out?

Feb 13, 2013, 04:38 PM	#1
stupididiot macrumors newbie Join Date: May 2009	2009 Bootcamped iMac overheating I have Core Temp 1.0 installed and it shows the machine shooting straight up to 100 C unless I have a fan blowing across the back of the machine. I also have MacFan running and it shows the systems fans working at max speed as needed. So I'm very confused, because this doesn't seem to be a fan driver issue, and this does not happen in the Mac OSX partition. I'm also not necessarily pushing the machine very hard... When the fan is blowing across the back it stays cool though. Any help?
	0

Feb 13, 2013, 04:41 PM	#2
jav6454 macrumors G5 Join Date: Nov 2007 Location: 1 Geostationary Tower Plaza	What is the rpm (speed) of the fan when Windows is running? Also, what programs are running at startup? __________________ Al MacBook 2.4GHz Late '08 \| Macross Click Me
	0

Feb 13, 2013, 04:42 PM	#3
simsaladimbamba macrumors Core Join Date: Nov 2010 Location: in front of it	If the iMac would overheat, it would shut down, to prevent actual overheating. Anyway, what are you actually doing during those high temperature times and what are the fans' speeds? Since you did not specify the actual iMac you have (there were several options in 2009 ranging from C2D via i5 to i7 CPUs), maybe this can help: Those Macs in their heat - a sine of over-heating? - a short story by Mister GGJstudios __________________ This is not
	0

Feb 13, 2013, 04:54 PM	#4
stupididiot Thread Starter macrumors newbie Join Date: May 2009	That's when the core0 temp is around 89 C CPU is Core 2 Duo E7600 I'm doing anything from transcoding (which kicks the CPU to 100%) or just letting it idle. It will always eventually shut down to prevent over heating Last edited by stupididiot; Feb 13, 2013 at 05:03 PM.
	0

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Feb 13, 2013, 05:11 PM	#6
stupididiot Thread Starter macrumors newbie Join Date: May 2009	Thanks for the correction. I'm using MacFan now to increase the fan speeds manually, we'll see how it goes
	0

Feb 13, 2013, 06:07 PM	#7
stupididiot Thread Starter macrumors newbie Join Date: May 2009	It's working well! I guess the fans weren't working properly after all. My only remaining concern is that I don't know which fans are which. Can anyone advise me as to how to figure that out?
	0


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