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MacBook Pro Late 2008 108 Degrees CELSIUS! (UPDATE)
- Thread starter darrenscerri
- Start date
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I'm also experiencing this same problem so I'm using 9400 which helps a lot. Machine stays pretty cool. With 9600 it gets near 100C before fans kick in.
Hopefully Apple fixes this asap. 100C shouldn't kill a mobile cpu but it definitely shortens the lifespan of the chip if it's used regularly @100C.
That SMC firmware update Apple released a couple of days ago, it wasn't meant to fix this problem was it? At least I don't recall any comment on this issue with the update. We can only hope that Apple is working on a next update that addresses this one.
Hopefully Apple fixes this asap. 100C shouldn't kill a mobile cpu but it definitely shortens the lifespan of the chip if it's used regularly @100C.
That SMC firmware update Apple released a couple of days ago, it wasn't meant to fix this problem was it? At least I don't recall any comment on this issue with the update. We can only hope that Apple is working on a next update that addresses this one.
So no, the SMC Update, as stated by Apple, was only to fix some issues with the MagSafe and battery charge indicator.
The moral of this story: to prolong the life of your MBP, don't use Windows. As a side benefit, posters will spare us the horror stories we want to hear as much as nails on a chalkboard.
.Here is what i did
Here is what i did:
1. Reset the SMC
2. have iStat pro
3. Opened terminal and
-> typed yes /dev/null
opened another terminal window
-> typed yes /dev/null
let it run for 10 min and my cpu only reached 60 c (room temp 20c)
4. Put the mac to sleep for 10 min
5. Woke it again and ran the same test as before with the same result.
Here is what i did:
1. Reset the SMC
2. have iStat pro
3. Opened terminal and
-> typed yes /dev/null
opened another terminal window
-> typed yes /dev/null
let it run for 10 min and my cpu only reached 60 c (room temp 20c)
4. Put the mac to sleep for 10 min
5. Woke it again and ran the same test as before with the same result.
are you sure your CPU rose to 100% usage? You have a typo. You should write "yes > /dev/null" in the terminal, not "yes /dev/null". Also, you don't only need to monitor the temperature but the fans too, as they stay 2000rpm.
Okay that made some changes
Okay i ran it all over again
1. Reset the SMC
2. use iStatpro
3. Made sure there were no typo in terminal (and that made the cpu to rose to 100%)
4. The temp in the first test after i have reset the SMC. Rose to 75c and the fan stayed at 2000 rpm. I ran the test for 10 min
5. I then put it to sleep
6. Woke it again after 5 min
7. Ran the test again and the temp on the cpu rose to 78c no fan was kicking in - it stayed at 2000 rpm.
The pic is from test 2 after sleep
http://i718.photobucket.com/albums/ww183/jmmmjo_pic/Billede2.png
Okay i ran it all over again
1. Reset the SMC
2. use iStatpro
3. Made sure there were no typo in terminal (and that made the cpu to rose to 100%)
4. The temp in the first test after i have reset the SMC. Rose to 75c and the fan stayed at 2000 rpm. I ran the test for 10 min
5. I then put it to sleep
6. Woke it again after 5 min
7. Ran the test again and the temp on the cpu rose to 78c no fan was kicking in - it stayed at 2000 rpm.
The pic is from test 2 after sleep
http://i718.photobucket.com/albums/ww183/jmmmjo_pic/Billede2.png
run the test again (the /dev/null one) and see if the temperature climbs up to more than 85c. If it does, and the fans stay 2000rpm, then you have the same problem.
(N.B. I practically think that, if not all MBP, the majority of the MBP suffer from this issue).
Did it again
I did the test again and the cpu rose to max 79 c after 10 min (for how long do you run your test) the fans never ran higher than 2000 rpm
Pic 1 after 5 min of test
http://i718.photobucket.com/albums/ww183/jmmmjo_pic/Billede1.png
Pic 2 after 10 min of test
http://i718.photobucket.com/albums/ww183/jmmmjo_pic/Billede2-1.png
I did the test again and the cpu rose to max 79 c after 10 min (for how long do you run your test) the fans never ran higher than 2000 rpm
Pic 1 after 5 min of test
http://i718.photobucket.com/albums/ww183/jmmmjo_pic/Billede1.png
Pic 2 after 10 min of test
http://i718.photobucket.com/albums/ww183/jmmmjo_pic/Billede2-1.png
I have a 2.53 unibody and followed your steps precisely. My machine usually idles at 62-63 degrees. I did an SMC reset and then ran CPUTest. Both fans spun up fairly quickly, CPU temperature went up to 95 degrees and then stabilized around 90-91. Considering that the laptop is raised from my desk, this still sounds high. I wonder if it's a thermal paste issue.
My machine stands flat on a wooden desk and the idles temp is between 35 - 37 degrees (when I use the 9400 and around 41 - 43 drgrees when I use the 9600) so i think it is to high. The 2,4 GHz should run a bit cooler than the 2,53 GHz (25 watt compared to 35 watt on the 2,53 GHz) but that much I don´t think.
That would mean your computer gets to 226 degrees Fahrenheit. I can't imagine that is accurate. Am I the only skeptic? My comp gets to 135F and I can't imagine temps beyond that.
How does it work if I take my laptop to have its logic board replaced? I mean do they format the HDD or just change the board? I would assume that the first thing they do is a format / re-install OS X. Can a customer say that don't format the HDD, just replace the board? I've got so many apps installed and it would suck quite hard if I had to re-install them all. I'm still waiting for a firmware update but can't wait forever.
EDIT: I just remembered this little program called smcfancontrol. You guys who have used this, what do you think of it?
EDIT: I just remembered this little program called smcfancontrol. You guys who have used this, what do you think of it?
I found out why my fans never kicked in when the cpu temp reached more than 65 c. I had the smc fan control installed. After I removed it and I did the test over again. Then the fans will spin up at 68 c after I have done a SMC reset but after it had been to sleep the fans don´t spin up so i'am having the SMC problem too, but temp around 100 c I can´t reached.
I have tried a "yes>/dev/null" test (two terminal window) after the mac had been to sleep for 30 min and it don´t get over 80 c with the fans running 2000 rpm.
I have been using Fan Control, to automatically adjust the fans according to CPU temperature. Fan Control uses a daemon (a process which runs all the time in the background) to read the temps of the CPU, and adjust the fans accordingly. This is a good solution, but still, Apple needs to fix this issue! And of course, Fan Control does not work in Windows, so whenever you need to boot into windows via bootcamp, you have to kill the process named fancontroldaemon, set the minimum fan speed to about 5000 rpm in SMCFanControl, and then boot to Windows.
I noticed that for me, the fans only lag once.
For example, I can load up windows, launch a game as fast as I can (when my temp. monitoring software is running on the second monitor). I can watch the temperatures reach 103C until the fans even start to rev up.. Once they reach full speed, in a few minutes it can reduce temps to 90C and then very very slowly reduce to 87-85C.
I noticed that if I quit the game, let the temps return to idle, and then let the fans reduce back to 2000, upon the next execution of the game, the fans are much much faster in rev'ing up.. They won't let the machine hit 85 without being full blast..
Interesting that sometimes it does nothing until the extremely dangerous 100C and others it will step in..
Whatever the case, still no BlSOD for me since the logic board replacement... yet...
For example, I can load up windows, launch a game as fast as I can (when my temp. monitoring software is running on the second monitor). I can watch the temperatures reach 103C until the fans even start to rev up.. Once they reach full speed, in a few minutes it can reduce temps to 90C and then very very slowly reduce to 87-85C.
I noticed that if I quit the game, let the temps return to idle, and then let the fans reduce back to 2000, upon the next execution of the game, the fans are much much faster in rev'ing up.. They won't let the machine hit 85 without being full blast..
Interesting that sometimes it does nothing until the extremely dangerous 100C and others it will step in..
Whatever the case, still no BlSOD for me since the logic board replacement... yet...
I use smc fan control on the the OSX and windows side. I keep my fans at 3500 rpm's in OSX and in my house with a four year old running around this is hardly audible and my temps stay around 35C. On the windows side doing normal stuff I set them to 5000 rpm's and my temps stay around 55C and for gaming in windows I set them to 6200 rpm's(max) and even when I overclock with rivatuner my temps never go over 85C playing call of duty 5. I think if anyone uses their mac to run windows they better be using smc fan control.
I contacted Apple by sending them feedback. I hope Apple responds to this issue soon by a firmware update. I do think that in some cases this is linked with the BSOD problem.
I'll chime in and say I have this problem too...I've been running the fans high with smcfancontrol, but I'd love to see an update. Using software to do what my computer should do automatically is ridiculous. Cranked the graphics card up to 204ºF the other day by accident and will very quickly and suddenly get a black screen autoshutdown if I fire up a game.
Submitting a report to Apple...hopefully we'll get some kind of update.
Submitting a report to Apple...hopefully we'll get some kind of update.