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High CPU temp on new SR MBPs

13221 Views 54 Replies Latest reply: Jun 29, 2007 4:53 AM by tonkatuph RSS
  • uncleinabucket Calculating status...
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    Jun 21, 2007 10:23 AM (in response to bcbarnes)
    I just got done reading the engadget article linking hear and was pretty upset when i saw the picture. I am upset for a different reason than you MBP owners are. I have about 6 years of experience working on the sickest computers this planet has to offer. On-site and workbench support at a college.

    Take almost any modern notebook apart and you will most likely see one of two things. A thick pre-made and cut pad of thermal compound (in most cases terribly outperformed by the even the sloppiest grease) or you will see EXACTLY what the user above did. Ideally it should not look like this.(though it is a world of improvement past what the MPB core duo's looked like). I would have liked to see it neater but too much is better than too little. That PCB around the chip is designed to withstand quite a bit of heat. The heat you feel coming the laptop is GOOD (it's the passive portion of heat dissipation). the bulk of heat comes from the vents the materials diffuse the rest as best they can.

    From looking at those pictures I would say there are larger contributors to heating issues than your grease.

    First and foremost, You should never run ANY computer on a soft insulative surface... EVER! that includes pants, skin, blankets, carpet.

    After that, make certain you have airflow around the entire machine. I would suggest a cheap stand that does not obscure the vents.

    After that, install this:

    If you think it's still too hot. Take it to the apple store. Tell them it's too hot then compare it to a display model under load. Do not attempt a re-grease unless you know exactly what your doing and want to void your warranty or you feel like lying ("nope haven't opened it give me another")
    MBP, Mac OS X (10.4.9)
  • Don_McCracken Level 1 Level 1 (10 points)
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    Jun 21, 2007 4:03 PM (in response to bcbarnes)
    After reading the whole thread, I didn't see a single comment about the potential noise these fans are generating spinning at those high rpms. My first 15" 1.0Ghz Powerbook G4 was very noisy. The fans came on all the time which was very annoying. My current 17" 1.5GHz Powerbook G4 is very quiet and the best laptop I've owned. And it doesn't run very hot.

    Now I'm in the market for a new 17" 2.4GHz Santa Rosa MBP but are worried it will be too noisy if those fans need to run all the time to cool down that hot CPU. What's your experience regarding this? Are the new MBPs hot but quiet or just hot and noisy?
    Dual G5 2.0, Mac OS X (10.4.9)
  • UltraNEO* Level 2 Level 2 (180 points)
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    Jun 21, 2007 6:17 PM (in response to Don_McCracken)
    GOD DA*N!

    Hey!! Thief!!!

    ... cheeky bast**d has taken the liberty to use my photo as a feature on their commercial blog without asking for permission. Things like this really gets my goat!

    Next time I hope they'll ask first, it's not difficult flickr makes it real simple.. and my URL is on my profile!

    Their article: applied-thermal-gre/

    (Sorry Don_McCracken, it's not a reply to you.)
    MacBook Pro (SR), Mac OS X (10.4.9), Glossy/2.2Ghz/4Gb/160Gb @ 7200rpm (hey!! still need more space!!)
  • djfelixm Calculating status...
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    Jun 22, 2007 1:45 AM (in response to bcbarnes)
    Here is what I noticed. I have two machines. A 2.33Ghz MacBook Pro and a 2.4Ghz. I compared the two machines side by side to see what is going on with this heat that everyone is talking about, and this is what I found out.

    Apple in an effort to give more battery life to their latest models, they opted to set the SMC firmware to kick in the fans at a higher temp then the previous model. On the 2.33Ghz at 60 degrees the fans move at 2600 rpm, on the 2.4Ghz the fans move and stay at 2000 all the way up to 70 degrees then at 80 they kick in at 4500 to 5000, which still keeps the machine nice and quiet, it never goes above 80 degrees. This makes the machine a bit more hot but it lasts longer on battery and it is much quieter then the previous model.

    I don't think that there is an issue here since the 2.33Ghz sounds like it's about to take off at 75 degrees with it's fans maxed out at 6000 rpm. So rather then take your machines apart just realize that this was done intentionally to maximize battery life and make for a quieter but hotter machine.

    Just my thoughts

    Mac Book Pro 2.4Gh 4GB RAM, Mac OS X (10.4.10)
  • Don_McCracken Level 1 Level 1 (10 points)
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    Jun 25, 2007 11:19 AM (in response to djfelixm)
    Thanks for your reply Felix,

    I am not at all concerned with heat as I don't work with my laptop on my lap. I am however, extremely concerned with noise as I record audio in a quiet environment.

    From your post I assume that I can safely buy a new 2.4GHz 17" MBP, and that it will be quiet and not sound like it's taking off? That would be great!
    Mac OS X (10.4.9)
  • jshum Calculating status...
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    Jun 28, 2007 6:17 PM (in response to bcbarnes)
    I am having extremely high cpu temperatures as well. I've actually encountered many instances where under heavy load my computer will freeze up until the temperature cools down or crashes all together. This usually occurs when the 3D processor is being used, for instance when I'm playing World of Warcraft.

    I've never had these issues with my Powerbook G4 1.25GHz, but then again I never ran them at these max settings.

    Does anyone know if this has to do with the CPU overheating or maybe the graphics card is getting too hot?

    What do you guys think?

    Thanks for the help
    MBP SR 2.2GHz Glossy, Mac OS X (10.4.10)
  • brian wah Calculating status...
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    Jun 28, 2007 6:27 PM (in response to bcbarnes)
    So are you guys saying that when my CPU A (reading by Islayer) reaches a temp of 200 F or 93.33 C and still climbs while using Handbrake that it's still ok? Once it reached 200 I freaked and closed it out.

    The fans are running but quiet.

    Using new Macbook pro SR 2.2ghz
    macbook pro, Mac OS X (10.4.9)
  • brian wah Level 1 Level 1 (15 points)
    Currently Being Moderated
    Jun 28, 2007 6:59 PM (in response to bcbarnes)
    Never mind...

    ran it past 198 F and the fans kicked up to 5,000 and then cooled off the CPU to a steady 170F. Even at that speed the fans are not as annoying as my old ibook. This thing is awesome!!

    Installed the latest 1.0 update for macbook pros.

    macbook pro SR
  • tonkatuph Calculating status...
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    Jun 29, 2007 4:53 AM (in response to bcbarnes)
    I also updated to 1.0 update and now my warcraft 3 and xbench crash everytime. Warcraft 3 crashes immediately while xbench does its usual thing and crashes in the process.

    Any idea?
    macbook pro 17" cd2, Mac OS X (10.4.8)
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