Forums
New posts
Articles
Product Reviews
Policies
FAQ
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Menu
Log in
Register
Install the app
Install
Forums
Apple Computing Products:
macOS - Notebook Hardware
Rember on the MBP-Or, "how to cook an Apple"
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="ogFromBrussels" data-source="post: 505857" data-attributes="member: 39814"><p><strong>Got the same problem too</strong></p><p></p><p>Hi,</p><p>I noticed the problem you are talking about too. I'm quite happy not to be the only one...</p><p>I did some tests launching multiple super pi computations at the same time. Here are my observation, during the first one or two hours, no problems, the fans speed up to 6000 rpm during the tests, keeping the CPU temperature at 60°C. After this first period (3+ hours), the "bug" appears and even when the CPU reaches 87°C the fans stay at 2000 rpm (however I can still "manually" control the cpu via smc fan control). If I reboot the laptop the bug is still there...</p><p>To me the problem doesn't seem to be related to the hardware... It looks more like a software design problem. It sounds the soft doesn't take the "good" sensor into account, but a sensor near from the cpu (by near I mean for example on the HeatPipe): </p><p>at the beginning the laptop is cool thus when loading a heavy computation the delta between the higher temperature and the lower one is significant enough to trigger the fans. (even on other sensors near from the cpu due to heat conduction)</p><p> But after a while the average temperature of the laptop is much more important than at the beginning thus the temperature delta is not sufficient to trigger the fans. (the heat conduction is not important enough to increase significantly the temperature on sensors located in an area near from the CPU).</p><p></p><p>FYI, I've got a mbp C2D 2,2GHz 2Go.</p></blockquote><p></p>
[QUOTE="ogFromBrussels, post: 505857, member: 39814"] [b]Got the same problem too[/b] Hi, I noticed the problem you are talking about too. I'm quite happy not to be the only one... I did some tests launching multiple super pi computations at the same time. Here are my observation, during the first one or two hours, no problems, the fans speed up to 6000 rpm during the tests, keeping the CPU temperature at 60°C. After this first period (3+ hours), the "bug" appears and even when the CPU reaches 87°C the fans stay at 2000 rpm (however I can still "manually" control the cpu via smc fan control). If I reboot the laptop the bug is still there... To me the problem doesn't seem to be related to the hardware... It looks more like a software design problem. It sounds the soft doesn't take the "good" sensor into account, but a sensor near from the cpu (by near I mean for example on the HeatPipe): at the beginning the laptop is cool thus when loading a heavy computation the delta between the higher temperature and the lower one is significant enough to trigger the fans. (even on other sensors near from the cpu due to heat conduction) But after a while the average temperature of the laptop is much more important than at the beginning thus the temperature delta is not sufficient to trigger the fans. (the heat conduction is not important enough to increase significantly the temperature on sensors located in an area near from the CPU). FYI, I've got a mbp C2D 2,2GHz 2Go. [/QUOTE]
Verification
Post reply
Forums
Apple Computing Products:
macOS - Notebook Hardware
Rember on the MBP-Or, "how to cook an Apple"
Top