CPU temperature in "Idle" when on battery / AC
I just turned into a Mac user for some days ago. Really like Leopard etc and the Macbook 5.1 is also really nice. But nothing is perfect..
The left upper corner on my Macbook is quite hot for being a /laptop/. At the moment I do not want to sit with my new computer in my lap for more than 15 minutes (feels like sitting whit a frying pan in ones lap). I guess the that the CPU is located in the left corner..
_+When I tested the below I had all "extra programs" closed. The only running programs where Terminal + top and Firefox.+_
*On battery*
- My CPU is @ 43-50 degrees (cel) in idle when on battery which is quite ok (CPU load under 5%)
- When I "stres" the CPU with some web browsing, the temp rises at once about 3-5 degrees. I have flash etc disabled in firefox. (CPU load 5% - 20% max)
*On AC*
- CPU load about the same but temperature is always some degrees higher.
- Top command shows the same processes as on battery.
When I open more programs, like Adium, Skype etc, the CPU load of course is somewhat higher (a few %) but CPU temp rises at once over 3 degrees which I think is ridiculous really.
Also it feels like the CPU never reaches the sleep state, is there a powertop like program for Mac´s?
http://www.lesswatts.org/projects/powertop/
Since you can not (yet) undervolt/underclock Core 2 Duo CPU´s like Centrino CPU´s (which was the best CPU Intel has ever made), how can I force the CPU to run at the lowest speed all the time (to 1Ghz which should be 500Mhz more than needed when you surf the web etc) and turn off devices that I do not need (USB ports, DVD drive etc etc)?
Also, is this Macbook 5.1 / Leopard with kernel 9.5.1 compatible with ULV CPU´s?
Any tips for increasing the battery life and make the laptop run cooler is much appreciated (ie, tips other than dimming monitor, turn of bluetooth etc). Ie, looking for how you can run wlan on less power etc if there is knowledge in Leopard for such things.
Thank You in advance for Your reply!
BR,
Chrisse
PS! I would have paid lots of more Euros for this machine with ULV CPU 😟
Macbook 5.1, Mac OS X (10.5.5), "Unibody"