Register FAQ / Rules Forum Spy Search Today's Posts Mark Forums Read
Go Back   MacRumors Forums > Apple Hardware > Notebooks > MacBook Air

Reply
 
Thread Tools Search this Thread Display Modes
Old Feb 25, 2013, 10:39 AM   #1
ignoble.yeti
macrumors newbie
 
Join Date: Feb 2013
Coolbook question

Hi,

I have a mid-2009 Rev C Macbook Air 2.13 running Snow Leopard. I have installed Coolbook and it seems to be working well since I have the best Geekbench results for this model - 3444 and 3445 respectively, while the average for the model is ~2900. Results without Coolbook are even lower for me (~2400).

However, I seem to recall that when I first installed Coolbook in 2009, I would get Kernel panics at 0.95 CPU voltage, but now I don't get them at the minimum selectable voltage of 0.925. Does this mean that undervolting isn't really working anymore, and that the good Geekbench results are only due to higher permitted temperature (I have set a limit of 85C)?

Battery life drops dramatically the minute I perform any processor intensive task. For example, if the battery shows over 4 hours remaining with just Word open, and I open and close iTunes, this will drop to about 2 hours. Actual battery life obtained on average is around 3 hours.

Hence my questions are:
-Why am I not getting kernel panics anymore?
-How do I check actual CPU voltage? Coolbook shows voltage switching, but the reading from iStat Menus is different and static - does not show any variation with processor load. CPU current draw does seem to change.
-Are there built-in system tools or maybe xcode tools to check CPU voltage?
-How do I improve battery life? In Coolbook for battery, I currently have two settings from B/2 menu and the minimum speed setting from normal menu, all set to minimum selectable voltage of 0.925V. Throttling is set to low.

I did experiment with Mountain Lion with and without Coolbook, but it seems much less efficient with the fans going to full speed with even normal web browsing, and battery life drops to below 2 hours.

Any help is much appreciated!
ignoble.yeti is offline   0 Reply With Quote
Old Feb 25, 2013, 11:26 AM   #2
Monkeyat
macrumors regular
 
Join Date: Feb 2009
Simple: Coolbook is dead !
Monkeyat is offline   0 Reply With Quote
Old Feb 25, 2013, 11:58 AM   #3
ignoble.yeti
Thread Starter
macrumors newbie
 
Join Date: Feb 2013
I'm not sure I understand what you mean. This is a Core2Duo machine with OSX 10.6, which I believe continues to be supported?

Last edited by ignoble.yeti; Feb 25, 2013 at 12:44 PM.
ignoble.yeti is offline   0 Reply With Quote
Old Feb 26, 2013, 08:10 AM   #4
wolfpuppies3
macrumors 6502
 
Join Date: Jun 2012
Location: Virginia, USA
Perhaps monkeyat is ill informed?

http://www.coolbook.se/CoolBook.html
__________________
2012 MBA 13, 2 Ghz i7, 8 GB RAM, 512 GB SSD; 2011 MBA 11, 1.8 Ghz i7, 4 GB RAM, 256 GB SSD; 2010 MB Pro 15, 2.66 Ghz i7, 8 GB RAM, 512 GB SSD; two iPad 3s and a mini, two iPhones and a bunch of iPods
wolfpuppies3 is offline   0 Reply With Quote
Old Feb 26, 2013, 08:12 AM   #5
alphaod
macrumors Core
 
alphaod's Avatar
 
Join Date: Feb 2008
Location: 上海 (Shanghai)
Quote:
Originally Posted by wolfpuppies3 View Post
Perhaps monkeyat is ill informed?

http://www.coolbook.se/CoolBook.html
All newer computers are not supported.
__________________
Mac Pro | iMac | Mac mini | MacBook Pro | MacBook Air | iPad | iPhone | iPod
alphaod is offline   0 Reply With Quote
Old Feb 26, 2013, 09:49 AM   #6
ignoble.yeti
Thread Starter
macrumors newbie
 
Join Date: Feb 2013
Quote:
Originally Posted by alphaod View Post
All newer computers are not supported.
This is not a new computer. Almost 4 years old. The support for this machine is not a matter of debate. I've pointed out that undervolting worked perfectly in the past and I'm seeking to verify that it is currently working as it should.
ignoble.yeti is offline   0 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > Notebooks > MacBook Air

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
Resolved: Coolbook for Mountain Lion - working D A OS X 10.8 Mountain Lion 21 May 17, 2014 11:36 AM
Mophie Juice Pack Plus (iPhone 5) Question - Mute Button Question JulesK iPhone Accessories 3 Mar 30, 2014 02:58 PM
Coolbook Working on Mavericks - Details here NoiseGUI OS X Mavericks (10.9) 0 Oct 27, 2013 06:03 PM
Question for anyone who has seen or owns the pink ipod nano? Color deciding question. Pinkstiletto66 iPod 4 Apr 4, 2013 12:57 PM
Family Share Question, Upgrade Question, Argh head hurting.. Jazwire iPhone 1 Sep 14, 2012 12:19 AM

Forum Jump

All times are GMT -5. The time now is 05:12 AM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC