CPU speed not reported correctly

John-Mark Gurney gurney_j at resnet.uoregon.edu
Thu Dec 30 10:12:29 PST 2004


Nicolas Blais wrote this message on Thu, Dec 30, 2004 at 11:46 -0500:
> This is because AMD uses PowerNOW! technology which changes the voltage 
> (therefore the speed) of the cpu for the load it gets.

just for clarification, changed the voltage does not imply a change of
the speed, it just means that at slower clock rates, it can reduce the
voltage for the chip since the transistors don't need to switch as quickly..

> 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.

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."


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