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.
Why is my MBP running warmer on Snow Leopard?
- Thread starter arthursiew
- Start date
- Sort by reaction score
Resetting SMC (http://support.apple.com/kb/HT1411) worked for me, too.
Went from idling at 65-70C down to 50-55C.
Went from idling at 65-70C down to 50-55C.
Ok I have done some experimenting. I did a clean install of Snow Leopard and the problem was still the same.
The big problem I see is with flash and safari. When I play a youtube video in Safari the CPU usage shoots up to 100 % and stays there. I upgraded to the latest version of flash and get the same thing.
In Firefox the CPU usage is never more than 50% for the same video on youtube.
In OmniWeb, latest version, using WebKit the CPU usage is still only about 50%. So there must be an issue with Safari 4 and Flash for right now.
Still I installed Leopard for the heck of it before doing a clean install of Snow Leopard just to see.
In Leopard my MacBook Pro rarely went above 125 to 130 degrees. But in Snow leopard, right after startup I get a temp of 130 to 135 as a baseline.
I am also running a 320 gig Western Digital Scorpio drive.
For my computer I think it's a perfect storm of my 7200 rpm hard disk, the fact Snow Leopard is accessing GPU more and running hotter initially and an issue with Flash in Safari.
I'm using OmniWeb and not getting the fans turning on and off like before.
Still my entire laptop feels warmer and sometimes even writing in Word or Mellel will make it get hot. Do these programs use Rosetta in some way? I don't think Mellel does.
The big problem I see is with flash and safari. When I play a youtube video in Safari the CPU usage shoots up to 100 % and stays there. I upgraded to the latest version of flash and get the same thing.
In Firefox the CPU usage is never more than 50% for the same video on youtube.
In OmniWeb, latest version, using WebKit the CPU usage is still only about 50%. So there must be an issue with Safari 4 and Flash for right now.
Still I installed Leopard for the heck of it before doing a clean install of Snow Leopard just to see.
In Leopard my MacBook Pro rarely went above 125 to 130 degrees. But in Snow leopard, right after startup I get a temp of 130 to 135 as a baseline.
I am also running a 320 gig Western Digital Scorpio drive.
For my computer I think it's a perfect storm of my 7200 rpm hard disk, the fact Snow Leopard is accessing GPU more and running hotter initially and an issue with Flash in Safari.
I'm using OmniWeb and not getting the fans turning on and off like before.
Still my entire laptop feels warmer and sometimes even writing in Word or Mellel will make it get hot. Do these programs use Rosetta in some way? I don't think Mellel does.
+1 November 2007 MacBook 2.2GHz
Temperatures are definitely up by approx. 10c compared to Leopard. Using smcFanControl to set the default fan speed to 3600rpm in both cases.
It's not Spotlight, nor has resetting the SMC/Parameter RAM helped.
Temperatures are definitely up by approx. 10c compared to Leopard. Using smcFanControl to set the default fan speed to 3600rpm in both cases.
It's not Spotlight, nor has resetting the SMC/Parameter RAM helped.
I did a SMC reset on my Late 2007 Macbook as well with no luck.+1 November 2007 MacBook 2.2GHz
Temperatures are definitely up by approx. 10c compared to Leopard. Using smcFanControl to set the default fan speed to 3600rpm in both cases.
It's not Spotlight, nor has resetting the SMC/Parameter RAM helped.
The bottom of my Macbook now FEELS HOT after Snow Leopard instead of just warm.
No. It hasn't for me. Temperatures are still up, and the fan is still running at full speed more than usual.
I've had the exact problem as you described. Your temps are very similar to mine.
It has caused me problems forcing me to restart to get it cooled off.
I just did this... Thanks for the link.
+1...seems to have done the trick for me. Noticeably cooler now, back to where it was before.
I have observed the same. After 10.6.1, my temps are back in line with where I was under 10.5.8.
I've had the exact problem as you described. Your temps are very similar to mine.
It has caused me problems forcing me to restart to get it cooled off.
I just did this... Thanks for the link.
After three days...Temps have been up and down. Unpredictable, really. I may have to try a pram reset if it keeps it up.
+1 for me went from 145F to 130F while idling.
EDIT: After running for about an hour after the reset it is only running 1-5 degrees cooler, so its not what it was on Leopard.
CPU is running 4-11% with only adium running in the front. This usually yields about 55-59C It seems to vary.
Running opera raises it to 61-63. This is about 10C higher than leopard.
10.6.1 did not help.
Battery is getting pwned by opera.
Update:
woke up this morning to see if anything had changed. Its now running an average of 64-69 given opera and adium open.
P.S. MBP 15" mid 2009 2.93GHz 4g ram.
Running opera raises it to 61-63. This is about 10C higher than leopard.
10.6.1 did not help.
Battery is getting pwned by opera.
Update:
woke up this morning to see if anything had changed. Its now running an average of 64-69 given opera and adium open.
P.S. MBP 15" mid 2009 2.93GHz 4g ram.
I want to bump this because of 10.6.2...
I have it installed on an external and on every occasion (even after new printer drivers) its running hotter. I mean I have the Unibody Macbook, early 2008, and it constantly runs at about 80c. This is with NOTHING open. But the strange thing is it usually stays around that with a lot of applications running...strange. The processors seem to be always under load even when I'm not doing anything. They are constantly being used about 30-40% (according to istat). Anyone else have this problem to this extreme? Or know how to fix it? Snow leopard is snappy, and faster at everything that 10.5, but i feel like this heat could be an issue with the life of my computer.
Currently I'm running 10.5.8, with safari, firefox, and itunes open and I'm getting between 45-50c...
ARGGGG
I have it installed on an external and on every occasion (even after new printer drivers) its running hotter. I mean I have the Unibody Macbook, early 2008, and it constantly runs at about 80c. This is with NOTHING open. But the strange thing is it usually stays around that with a lot of applications running...strange. The processors seem to be always under load even when I'm not doing anything. They are constantly being used about 30-40% (according to istat). Anyone else have this problem to this extreme? Or know how to fix it? Snow leopard is snappy, and faster at everything that 10.5, but i feel like this heat could be an issue with the life of my computer.
Currently I'm running 10.5.8, with safari, firefox, and itunes open and I'm getting between 45-50c...
ARGGGG
Jupp, mine is not a threat to the trend here. 1 yr old macbook white 2.4 C2D. Upgrading to SL gave me additional harddisk space, but now it runs 70 oC using chrome + spotify. Fan speed at 6000 rpm was RARE before I installed SL. Even survived rendering in Photoshop without getting CPU temps too high, and it dropped fast.
Battery capacity has dropped stone dead too. Had no problem with 4-5 hrs running on battery watching films etc, now its max 3 hrs at totally idle.
Anybody got an idea how to solve this ****? I love my mac and iPhone, but Apple always has some crap going on. They usually do things so much better than Microsoft, but there's always something that's complete un-understandable...
Battery capacity has dropped stone dead too. Had no problem with 4-5 hrs running on battery watching films etc, now its max 3 hrs at totally idle.
Anybody got an idea how to solve this ****? I love my mac and iPhone, but Apple always has some crap going on. They usually do things so much better than Microsoft, but there's always something that's complete un-understandable...
Mine runs just 5-7 deg hotter.
And to those whose only response was 'SMC fan control'! I didn't pay over £2000 for a laptop to have to install 3rd party software to make sure the cpu didn't pop.
Apple and their updates, EISH!!!
And to those whose only response was 'SMC fan control'! I didn't pay over £2000 for a laptop to have to install 3rd party software to make sure the cpu didn't pop.
Apple and their updates, EISH!!!
As with any new OS, there is more lines of code to go through the cpu, thus raising temperatures. And since all the programs in SL are compressed to save space, opening and closing these programs will make your hard drive work harder and get hotter.
It's OpenCL! It's file compression! It's the newness! It's Grand Central!
No.
Go grab iStat Menus or Hardware Monitor, something that will show you the voltages and power numbers. A lot of the time, in SL, the system decides it simply no longer wants to throttle the clocks and voltages like it is supposed to. I don't know why, but something in the power management system is seriously screwed up in SL.
No.
Go grab iStat Menus or Hardware Monitor, something that will show you the voltages and power numbers. A lot of the time, in SL, the system decides it simply no longer wants to throttle the clocks and voltages like it is supposed to. I don't know why, but something in the power management system is seriously screwed up in SL.