Re: AMD Dual Core vs. Quad - Power Management

[Marc Perkel]

Marc Perkel
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--- On Tue, 6/17/08, David Rees <drees76@xxxxxxxxx> wrote:

> From: David Rees <drees76@xxxxxxxxx>
> Subject: Re: AMD Dual Core vs. Quad - Power Management
> To: mperkel@xxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Date: Tuesday, June 17, 2008, 4:26 PM
> On Tue, Jun 17, 2008 at 3:00 PM, Marc Perkel
> <mperkel@xxxxxxxxx> wrote:
> > Been running a few tests and an AMD motherboard
> booting 2.6.25 from
> > flash uses 0.33 amps if the CPU is a AM2 Athlon 6000.
> But if I used a
> >  Phenom Quad core CPU 9550 it pulls 0.55 amps.
> >
> > In theory the 9550 should pull less because it's a
> lower TPD and the
> > phenom processor is supposed to be smarter about power
> management.
> >
> > So - why is the Phenom pulling more power? Is it
> because power
> > management software for the Phenom isn't updated
> yet?
> 
> At idle with CoolNQuiet on, all AMD processors seem to pull
> close to
> the same amount of power, varying between 7-11 watts.
> Except for the
> quad core processors, which pull significantly more at idle
> w/CnQ on
> than dual and single core processors.
> 
> Tom's hardware has a nice chart listing power
> consumption here, all
> his testing was done under Windows. His tests show the
> Phenom pulling
> about twice the power of the Athlon64 X2 6000+ which
> matches up pretty
> closely to your numbers.
> 
> http://www.tomshardware.com/reviews/amd-power-cpu,1925-7.html
> 
> Sounds like a question for AMD. The Phenoms seem to be
> pretty good
> except for the extra 10-11w of power draw at idle which is
> disappointing.
> 
> -Dave

Thanks - that definitely answered my question. And I'm using b3 stepping.



      
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