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#1 2011-07-25 20:33:09

johan1391
Member
From: Dhahran, Saudi Arabia
Registered: 2010-08-03
Posts: 106

100% cpu > 104deg core temp?

Is it normal for the core temp of one of my two cores to stay at 104deg and the other around 100? Is that a safe temp to work at? I'm using macfanctld and it sounds like the fans are full throttle, but maybe I did something wrong. I checked the fan max rpm and the file said 5700. Shouldn't it be 6000? I tried changing it but I get access denied even as root. Any ideas?

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#2 2011-07-25 20:40:40

karol
Archivist
Registered: 2009-05-06
Posts: 25,440

Re: 100% cpu > 104deg core temp?

Is it temp F or temp C? :-)
If Celsius, it's too high. It would be nice to know what kind of processor it is, how exactly did you try to change the fan's rpm etc.

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#3 2011-07-25 20:49:34

cybertorture
Member
Registered: 2010-05-05
Posts: 339

Re: 100% cpu > 104deg core temp?

maybe this will solve your problem - click me


O' rly ? Ya rly Oo

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#4 2011-07-25 21:12:31

johan1391
Member
From: Dhahran, Saudi Arabia
Registered: 2010-08-03
Posts: 106

Re: 100% cpu > 104deg core temp?

EDIT: it is Celcius

Already have frequency scaling using laptop-mode-toolls. Also went into applesmc.768 and found fan1_max or something of the sort which contained a single entry as a number. I did the following:

sudo su

vim fan1_max

changed the value to 6000

then :wq

-Computer-
Processor        : 2x Intel(R) Core(TM)2 Duo CPU     T9600  @ 2.80GHz
Memory        : 4035MB (1656MB used)
Operating System        : Arch Linux
User Name        : jpw (##)
Date/Time        : Mon 25 Jul 2011 02:07:40 PM PDT
-Display-
Resolution        : 1920x1200 pixels
OpenGL Renderer        : Unknown
X11 Vendor        : The X.Org Foundation
-Multimedia-
Audio Adapter        : HDA-Intel - HDA NVidia
-Input Devices-
 PC Speaker
 Lid Switch
 Power Button
 Sleep Button
 Power Button
 applesmc
 HDA Digital PCBeep
 bcm5974
 Logitech USB RECEIVER
 2.4GHz 2way RF Receiver
 2.4GHz 2way RF Receiver
 HDA NVidia Headphone
 Apple, Inc. Apple Internal Keyboard / Trackpad
-Printers-
No printers found
-SCSI Disks-
ATA ST9500420ASG
MATSHITA DVD-R   UJ-868

Last edited by johan1391 (2011-07-25 21:35:49)

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#5 2011-07-26 18:18:32

johan1391
Member
From: Dhahran, Saudi Arabia
Registered: 2010-08-03
Posts: 106

Re: 100% cpu > 104deg core temp?

Any ideas.
Just tried encoding some videos and the same thing is happening. Has anyone found a good solution for fan control on a macbookpro (5,2)?

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#6 2011-07-26 19:17:42

whompus
Member
From: Durham. UK
Registered: 2005-08-09
Posts: 256

Re: 100% cpu > 104deg core temp?

I had a computer that was getting very hot like yours and it was the heat sink was not seated properly, so maybe hardware -> heatsink or blocked cooling fins/fan.

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#7 2011-07-26 19:19:54

karol
Archivist
Registered: 2009-05-06
Posts: 25,440

Re: 100% cpu > 104deg core temp?

whompus wrote:

I had a computer that was getting very hot like yours and it was the heat sink was not seated properly, so maybe hardware -> heatsink or blocked cooling fins/fan.

My google searches seems to second this opinion: they're always asking about heatsinks, thermal paste, dust and grease etc.

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#8 2011-07-26 19:32:48

johan1391
Member
From: Dhahran, Saudi Arabia
Registered: 2010-08-03
Posts: 106

Re: 100% cpu > 104deg core temp?

is there no way to increase the max fan speed? 5700 rpm seems too low.

I compiled macfanctld myself -- changing the formulas to increase in speed earlier and moremore rapidly than default. I just found a debian post floating around saying that their fan{1,2}_max was also 5700. Would if be unsafe to increase speed even if it were possible?

UPDATE: I just installed trayfreq so I can adjust the processor to a lower speed for heavy loads which is an annoying workaround for now. Would your guys suggest opening my mbp up as my next line of action or should I persist in trying to find a way to increase the fan speed?

I've been running at 2.4 GHz @ 100% for a while now as opposed to it's 2.8 GHz standard capacity and is at a more comfortable 80deg C

Last edited by johan1391 (2011-07-26 20:03:29)

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