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Why is my MBP running warmer on Snow Leopard?
- Thread starter arthursiew
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I just want to update my status...after using Snow Leopard for a few days, my MBP has seemingly cooled down and is no longer spiking in heat for the processor core. I'm at 42C now doing basic tasks whereas three days ago I was at 72C doing these same tasks. (?!?!?)
Have no clue as to why....but now I'm happy!
Have no clue as to why....but now I'm happy!
The G5s got quieter in Leopard.you would expect that with the snow it would be cooler
what about RAM?
has anyone considered how much RAM your Mac has? If less than 2GB, that might be the prob.
I don't know how to check the temp on my late 2007 MacBook 2Ghz with 2GB RAM. But when first installed, the fans went up to full speed for a while, until I restarted, but I didn't look, maybe TimeMachine was doing a backup or something.
has anyone considered how much RAM your Mac has? If less than 2GB, that might be the prob.
I don't know how to check the temp on my late 2007 MacBook 2Ghz with 2GB RAM. But when first installed, the fans went up to full speed for a while, until I restarted, but I didn't look, maybe TimeMachine was doing a backup or something.
where do you guys check temp? what program? i was using istat for that but since its in beta for SL, i dont have any apps to check temp on the mpb.
istat now running in SL
http://www.islayer.com/apps/istatmenus/
My Macbook Pro 2.4 4GB is also running 10-15 C hotter than with 10.5.8
Cant seem to boot back to my old Leopard clone though or I'd ditch SL immediately?...
http://www.islayer.com/apps/istatmenus/
My Macbook Pro 2.4 4GB is also running 10-15 C hotter than with 10.5.8
Cant seem to boot back to my old Leopard clone though or I'd ditch SL immediately?...
The temperature with normal use is the same as Leopard for me, but I have noticed that the fans seem to take a lot longer to come on than under 10.5.8. Typically the fans would get to around 2500-3000RPM as the CPU temp went over 70 C, but now it barely breaks 2500 RPM at 80 C.
I wouldn't call it a problem but I'm experiencing the same. With Leopard and in the same room, it would idle at 45 C. With Snow Leopard it varies between 50 C and 55 C. I checked Activity Monitor and there was nothing showing heavy CPU usage, the highest being "SystemUIServer" which is a system process. If you download iStatMenu, you will see very small/little CPU activity even when idle where as in Leopard, the graph would be clear. The small activity is probably the reason why temperatures are higher than in Leopard but I don't really know why or what's causing it. It just might be the nature of the OS (which in that case really sucks). I want to try to do a clean install but too lazy, might have to do it over the weekend before school starts.
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Look in Activity Monitor, (Applications>Utilities) and see what programs are using CPU. Could be Spotlight indexing or somthing.
Definitely not Spotlight/indexing. It was doing it on first boot but even that only took 5 min before it finished.
When I posted my original post, it was just MSN/Windows Live Messenger and Safari. I can close those and there will still be CPU usage. It's not something I or we are running, it's the system/files/processes.
For my original first gen MBP 1.86 with 2 gig RAM I see the same thing, idle temp is higher, used to start at 45 C from cold start and now it is 50-55.
Interestingly enough under load (playing high def video) I get no more than 67 C with fasn around 4000k. My perception is that under load it seems better than before but with no or little load it is noticably worse.
Interestingly enough under load (playing high def video) I get no more than 67 C with fasn around 4000k. My perception is that under load it seems better than before but with no or little load it is noticably worse.
I'm having temp issues as well with SL. It's gotten to the point where I switched over the the 9400M card instead of the 9600 ("Better Battery Life" instead of "Maximum Performance.")
I have a 15" Late 2008 UMBP, 4 GB. Before SL I would idle around 57 C and never get above 70 C unless I was doing something intensive. Now it gets to 66 C very quickly, climbs to around 75 C, the fans kick on and it slowly makes its way back down to 66 and then repeats. I checked activity monitor and I was at a 3-5% load the entire time (espn.com and adium) with a spike to 8-9% every once in a while for a few seconds.
The fans blasting every 5 minutes was driving me crazy. Switching to the 9400M seems to keep things in the 55-65 C range and thus eliminated the annoying cyclical fans issue. Overall I'm not really happy. I don't understand how a computer under a 3-5% processor load gets this hot. Hopefully they can do something to remedy this.
I have a 15" Late 2008 UMBP, 4 GB. Before SL I would idle around 57 C and never get above 70 C unless I was doing something intensive. Now it gets to 66 C very quickly, climbs to around 75 C, the fans kick on and it slowly makes its way back down to 66 and then repeats. I checked activity monitor and I was at a 3-5% load the entire time (espn.com and adium) with a spike to 8-9% every once in a while for a few seconds.
The fans blasting every 5 minutes was driving me crazy. Switching to the 9400M seems to keep things in the 55-65 C range and thus eliminated the annoying cyclical fans issue. Overall I'm not really happy. I don't understand how a computer under a 3-5% processor load gets this hot. Hopefully they can do something to remedy this.
Yes, but Activity Monitor doesn't show you GPU usage. More and more
of what used to be done on the CPU is now being offloaded to the GPU.
It might be that GPUs generate more heat for an equivalent amount of
processing. That's purely speculative, though.
If people are having higher than average temperatures, it's probably CPU related like how I stated in a post above. It's small processes that are making the CPU work resulting in higher temperatures even when in standby.
(Just thinking of reinstalling CS4, Office..ugh). It's small problems like this why I always do a clean install. Don't know why I didn't do it this time...
Had the same issues after installing SL on my late 2008 MBP.
On average, temps were 10 °C higher than under Leopard, regardless of kernel.
After SMC reset, temps are back to where they used to be under Leopard.
On average, temps were 10 °C higher than under Leopard, regardless of kernel.
After SMC reset, temps are back to where they used to be under Leopard.
+1 on this. My temps increased from mid 40's to low 60's post SL upgrade.
Reset SMC and PRAM and now I am back to mid 40's doing the same tasks. i.e. Safari and iTunes.
Left side of keyboard is now tolerable from a heat standpoint.....