Sureiyaa Posted August 15, 2007 Share Posted August 15, 2007 I have a first generation Core Duo MacBook Pro I'm starting to suspect that the macbook pro fan speed as controlled by the smc is actually not related to the cores' or any other part's temperature. What I observe is a very inconsistent trend if I compare temperature with fan speed. My hypothesis now is that the smc actually sets the fan speed according to cpu usage. I notice that the fans seem to miraculously run faster when I'm compiling a program or when Opera runs into some heavy routine of JavaScript. When the CPU usage is low, the MBP can be sitting there at 65 degrees Celcius (or 149 Fahrenheit) and the smc would leave the fans at 1000 rpm. Is anybody else seeing the same trend? Link to comment Share on other sites More sharing options...
Numberzz Posted August 15, 2007 Share Posted August 15, 2007 I have a first generation Core Duo MacBook Pro I'm starting to suspect that the macbook pro fan speed as controlled by the smc is actually not related to the cores' or any other part's temperature. What I observe is a very inconsistent trend if I compare temperature with fan speed. My hypothesis now is that the smc actually sets the fan speed according to cpu usage. I notice that the fans seem to miraculously run faster when I'm compiling a program or when Opera runs into some heavy routine of JavaScript. When the CPU usage is low, the MBP can be sitting there at 65 degrees Celcius (or 149 Fahrenheit) and the smc would leave the fans at 1000 rpm. Is anybody else seeing the same trend? they cant get lower than 1000 Link to comment Share on other sites More sharing options...
Sureiyaa Posted August 16, 2007 Author Share Posted August 16, 2007 they cant get lower than 1000 Exactly. 65 degrees is not a temperature at which you can comfortably put the MBP on your lap, yet the smc leaves it like that and lets the fans run at the lowest speed. Link to comment Share on other sites More sharing options...
Numberzz Posted August 16, 2007 Share Posted August 16, 2007 Exactly. 65 degrees is not a temperature at which you can comfortably put the MBP on your lap, yet the smc leaves it like that and lets the fans run at the lowest speed. if u set the fan speed at 2000 and u quit smc, the fans will stay at 2000. and if your computer thinks it should be above 2000, Mac OS X will take over Link to comment Share on other sites More sharing options...
AWhiteFlame Posted August 24, 2007 Share Posted August 24, 2007 I think you're correct Sureiyaa, I've noticed similarly. Link to comment Share on other sites More sharing options...
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