Re: Centrino question

Dino Klein
2004-05-23T20:33:04Z

Windows will use throttling to save on battery, when you are using the Max
Battery policy, and power is unplugged.
Check the following link, where MS explains the policies in XP:
http://www.microsoft.com/whdc/system/pnppwr/powermgmt/ProcPerfCtrl.mspx

>From: Cyril Wattebled <neurowork-GANU6spQydw@public.gmane.org>
>....
>Yes, I have already asked around why this happends. Windows slows the
>processor
>down to 200 mhz when unplugged and down to 600 mhz when plugged. Windows
>behaves just like linux with the AC power on but when on battery, it
>manages
>to slow it down to 200mhz. This allows the laptop to last more than on
>linux
>and also, the temperature of the overall laptop is cooler (which is really
>more
>confortable).
>It seems that Windows is using some kind of clock modulation along with the
>enhanced speedstep. I'm not sure about that but, I was told that it should
>be
>something like it. (cf cpufreq mailing list, thread called "Pentium M
>minimum
>clock modulation").

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