Notebook CPU's get a lot hotter than their desktop counterparts. 112c is probably nearing the borderline for processor health----it definitely isn't good for it. Desktop CPU's have bigger fans with much bigger heatsinks that keep the CPU quite a bit cooler under load.
Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
MacBook Pro Late 2008 108 Degrees CELSIUS! (UPDATE)
- Thread starter darrenscerri
- Start date
- Sort by reaction score
Notebook CPU's get a lot hotter than their desktop counterparts. 112c is probably nearing the borderline for processor health----it definitely isn't good for it. Desktop CPU's have bigger fans with much bigger heatsinks that keep the CPU quite a bit cooler under load.
I ran the CPU Test and looked at my Fan and Temp speeds the max it would go would be 78 degrees Celsius and my fan speed stayed right around 2005 rpm anything i need to worry about???
For reference, When I brought mine to the apple store due to the BlSOD problem, I mentioned to the genius that mines hitting over 105C. He was completely shocked.
If you stump even Apple's employees with your temperatures, there's clearly something wrong.
When my new logic board is installed I'll let you know if it doesn't run as hot.
this most recent update (SMC 1.2?) appeared to fix the fan problem. The fans come on a lot earlier-----I ran the same test that I ran before, and the Fan's started speeding up after about 10 seconds. It's running right now and the computer is 80c, 6192rpms
ive reset SMC.
...
im at 90 degrees.. fans are about 3k and rising.
ive disconnected powercord
removed battery
hold power for about 10secs
connected everything back in
.
seems it did the trick.
its holding at 88 celsius atm and dropping
is that alright?
edit:
but now, it wnet up to 100 again, before fans started to Rev up... :S
but they are 5k now.
temp around 93 for the last minute...
...
im at 90 degrees.. fans are about 3k and rising.
ive disconnected powercord
removed battery
hold power for about 10secs
connected everything back in
.
seems it did the trick.
its holding at 88 celsius atm and dropping
is that alright?
edit:
but now, it wnet up to 100 again, before fans started to Rev up... :S
but they are 5k now.
temp around 93 for the last minute...
probably not, but 100c is pretty high. you might want to consider establishing a repair history with Apple based on that. The hotter your components get the shorter life they have.
This problem seems to not exist when resetting the SMC. When I reset the SMC, and test with /dev/null, the fans kick in at about 75 degrees celcius and stabilising at 82 degrees celsius at about 3000rpm. But when I turn the MBP to sleep, and turning it back on, testing with /dev/null again, fans stay 2000rpm and temperature seem to rise up much faster, reaching a scorching 107-110 degrees celcius. Although the fans, after about 15-30 mins, seem to start rising in their rpm but very very slowly, reducing the temperature to about 95 degrees celcius.
The SMC settings seem to not 'stick' and are lost by a simple sleep! I don't know whats happening. Can someone try to replicate the situations and post results pls?
The SMC settings seem to not 'stick' and are lost by a simple sleep! I don't know whats happening. Can someone try to replicate the situations and post results pls?
nothing to worry about. if your max temp is 78 C w/ fans at 2000rpms - that is amazing.
Hi jsbarone, thanks for your feedback. Could you (and other MBP owners) retry the test after shutting down/restarting/sleeping your MBP? When I reset the SMC, everything seems to be normal, but after shutting down/restart/sleeping my MBP, the SMC seems to lose some internal settings and fans won't budge up.
I reran the test and it looks like you're right. 112c under load before the fans started getting higher at all. I'm scratching my head at this problem----what is Apple doing?
I really think that this is a very widespread problem, but it can be fixed by a simple SMC and firmware update like we had on December 10. All of you who think you have a perfect MacBook Pro, try the test and see if you have the same problem as we do!
1) Reset the SMC (http://support.apple.com/kb/HT1411)
2) Install a temperature monitor software (iStat Pro Widget, iStat Menu, SMCFanControl, but not Fan Control)
3) a) Download CPUTest, and run the test with these settings:
- Test Type - small
- Repetitions - Unlimited
- Instances - 2
OR
b) i) Open Terminal (Applications -> Utilities)
ii) Type without quotes: "yes > /dev/null"
iii) Open another terminal window
iv) Retype "yes > /dev/null"
(This should load your CPU to 100%)
4) Observe the temperatures and fan speeds. (Typically, after an SMC reset, the fans start speeding up at about 70 degrees celcius, and stabilising the temperature at about 83-85)
5) Now, close CPUTest or Terminal (depends on what you used), sleep, restart, shutdown, logoff or change your GPU, and after your system is on, rerun the same test you did before.
GoodLuck!
1) Reset the SMC (http://support.apple.com/kb/HT1411)
2) Install a temperature monitor software (iStat Pro Widget, iStat Menu, SMCFanControl, but not Fan Control)
3) a) Download CPUTest, and run the test with these settings:
- Test Type - small
- Repetitions - Unlimited
- Instances - 2
OR
b) i) Open Terminal (Applications -> Utilities)
ii) Type without quotes: "yes > /dev/null"
iii) Open another terminal window
iv) Retype "yes > /dev/null"
(This should load your CPU to 100%)
4) Observe the temperatures and fan speeds. (Typically, after an SMC reset, the fans start speeding up at about 70 degrees celcius, and stabilising the temperature at about 83-85)
5) Now, close CPUTest or Terminal (depends on what you used), sleep, restart, shutdown, logoff or change your GPU, and after your system is on, rerun the same test you did before.
GoodLuck!
i did what you said and everything happened exactly as you described:
1/reset SMC - CPU test: fans start running, up to 6000+, CPU stabilized at 76°C (nice
)
2/put computer to sleep, wake up - CPU test: crap. fans stuck at 2000t, CPU reaching 100°C and me stopping the test since i don't want to know how high it will go before explosion
1/reset SMC - CPU test: fans start running, up to 6000+, CPU stabilized at 76°C (nice
)2/put computer to sleep, wake up - CPU test: crap. fans stuck at 2000t, CPU reaching 100°C and me stopping the test since i don't want to know how high it will go before explosion
Interesting
Interesting... I will test this theory as well to see what my results are. Maybe the SMC becomes disoriented after waking from a sleep, which would not surprise me at all.
i did what you said and everything happened exactly as you described:
1/reset SMC - CPU test: fans start running, up to 6000+, CPU stabilized at 76°C (nice
2/put computer to sleep, wake up - CPU test: crap. fans stuck at 2000t, CPU reaching 100°C and me stopping the test since i don't want to know how high it will go before explosion
Interesting... I will test this theory as well to see what my results are. Maybe the SMC becomes disoriented after waking from a sleep, which would not surprise me at all.
Mine reached
66c when i ran the "ALL test type" it took 7.34 min and 31 successful test.
Here is a link to the specs for the 2,4GHz cpu in my MacBook Pro (late)
http://processorfinder.intel.com/details.aspx?sSpec=SLB3S
Which specify that the thermal Specification is 105c so if I where you I would have it replaced og fixed.
66c when i ran the "ALL test type" it took 7.34 min and 31 successful test.
Here is a link to the specs for the 2,4GHz cpu in my MacBook Pro (late)
http://processorfinder.intel.com/details.aspx?sSpec=SLB3S
Which specify that the thermal Specification is 105c so if I where you I would have it replaced og fixed.
It theoretically provides the same result. A thread (or in this context, 'instance'), in simple terms, is similar to a one-lane road where instructions and commands are fed into it to the CPU. Now each core can hold multiple threads (theoretically infinite amount of threads), BUT a thread cannot be divided to two cores. Therefore, to achieve an ideal 100% CPU usage in these tests, 2 or more instances should be used as each core can handle at least one thread (instance).
The test type is irrelevant as all of the types result in a 100% CPU usage.
I tried the same settings as you and after 8 min I stoped the test, with a max on 75c.