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Date:      Thu, 30 Dec 2004 11:46:48 -0500
From:      Nicolas Blais <nb_root@videotron.ca>
To:        freebsd-amd64@freebsd.org
Subject:   Re: CPU speed not reported correctly
Message-ID:  <200412301146.49669.nb_root@videotron.ca>
In-Reply-To: <58083.207.219.213.163.1104418371.squirrel@207.219.213.163>
References:  <20041229212555.GD89526@gargantuan.com> <20041230140022.GC59271@gargantuan.com> <58083.207.219.213.163.1104418371.squirrel@207.219.213.163>

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This is because AMD uses PowerNOW! technology which changes the voltage 
(therefore the speed) of the cpu for the load it gets.

Nick.

On December 30, 2004 09:52, Mike Jakubik wrote:
> Michael W. Oliver said:
> > When booting cold, the same speed is reported -- 801.83-MHz.  Yes, this
> > is a laptop (Sager 4750-V).
> >
> > entire output of `dmesg -a':
> > http://michael.gargantuan.com/yabbse/index.php?action=dlattach;topic=309.
> >0;id=17
> >
> > other info about this laptop:
> > http://michael.gargantuan.com/yabbse/index.php/board,44.0.html
>
> This is normal for AMD laptops. I have an Emachine M5310, and the CPU
> speed varies on it. If i right click on my computer in Windows XP, the
> reported frequency is almost always different. Strangely enough in FreeBSD
> its always the max though, i belive this technology may require a proper
> driver for the frequency to be adjusted. I would check your BIOS settings.
>
>
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