"Yugo" <nobody@nowhere.com> wrote in message
news:12d4mod9ti425a3@corp.supernews.com...
> Me and Paul were having this discussion. (Quoted text is Paul's) But it
> seems Paul is busy today... or maybe I made a complete fool of myself, but
> I still don't understand. My question is at the very end of the text, but
> following the discussion might help.
>
> I would like to thank Paul for all the information he's provided so far.
>
> ---------------
>
> > Cool N' Quiet is a feature of Athlon64 processors. When Windows
> > is idle, the "CPU driver" can write a FID (frequency) control
> > register, and drop the processor from 2400MHz, to 1000MHz. Since in many
> interactive (web surfing, email) situations, the
> > processor is idle most of the time, this saves electricity
> > and makes the processor run cooler. It immediately speeds up
> > as soon as you move the mouse.
>
> It seems there's also a driver for Linux 2.6.10 and later kernels:
>
> AMD Turion™ 64 Mobile Technology Processors,
> AMD Opteron™ Processors, and
> AMD Athlon™ 64 Processors Driver Version 1.60.01 for Linux 2.6. - Supports
> all AMD Turion™ 64 Mobile Technology Processors, AMD Opteron™ Processors,
> and Athlon™ 64 Processors released through 2006. Provides support for AMD
> PowerNow!™ technology and, where appropriate, AMD’s Cool-n-Quiet™
> technology for Linux systems. Works with all kernels, version 2.6.10 or
> later. Requires cpufreq-1.20, cpuspeed-1.20.1, or powersaved-0.8.19 or
> later to support SMP and dual-core systems.
>
> http://www.amd.com/us-en/Processors/...1_9706,00.html
>
> So, the same processor may run at different wattages. OK.
>
> > When the processor is running at full speed (say you are shrinking
> > a DVD before writing a movie to a blank DVD), then the power difference
> > between the high power and low power processors takes
> > effect. Maybe if you kept your processor busy all the time,
> > the lower power rated processor would give you a cooler running
> > computer. But for interactive style usage, the Cool N' Quiet feature
> > saves plenty of power.
>
> I see... but I'm afraid I'll have a question below.
>
> > As an example, look at PDF page 17 of this document. It shows the
> > processor
> > ADA3500DEP4AS, a 3500+.
> >
> >
> ><http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/30430.pdf>
> >
> > The allowed operating conditions, tested at the factory are:
> >
> > Name Power Frequency
> > Max Pstate 89W 2200MHz
> > Intermediate Pstate #1 69W 2000MHz
> > Intermediate Pstate #2 50W 1800MHz
> > Min Pstate 22W 1000MHz
>
> Ok. Now, here's the SAME processor at:
>
> http://www.amdcompare.com/us-en/desktop/default.aspx
>
> Processor: AMD Athlon™ 64
> Model Number: 3500+
> Frequency (MHz): 2200
> L2 Cache Size: 512KB
> Socket: AM2
> Stepping: F2
> Manufacturing Tech (CMOS): 90nm SOI
> Wattage (W):
> System Bus (MHz): 2000
>
> As you can see, there's nothing beside Wattage. At this stage, the choice
> is between 35 or 62. Isn't this to operate at 2200 MHz, the maximum
> frequency?
>
Hi, I am not sure precisely what you are asking (I take it English is not
your
first language), but anyway....
What puzzeled my when looking at that processor was that you see two
processors which are identical in everyting apart from power consumption.
Well there is a slight voltage difference but not enough to explain the
power consumption figures.
It just seems they are tested for power consumption and then graded
in a similar mannner to how processors are rated for speed.
http://arstechnica.com/news.ars/post/20060516-6840.html
AMD Athlon™ 64 Details
Processor AMD Athlon™ 64
Model 3500+
Ordering P/N (Tray) ADD3500IAA4CN
Ordering P/N (PIB) ADD3500CNBOX
Operating Mode 32/64
Stepping F2
Frequency 2200Mhz
HT Speed 2000
Voltage 1.20V/1.25V
Max Temp 78°C
Thermal Power 35W
L1 Cache 128KB
L2 Cache 512KB
CMOS Technology 90nm SOI
Socket Socket AM2
Processor AMD Athlon™ 64
Model 3500+
Ordering P/N (Tray) ADA3500IAA4CW
Ordering P/N (PIB) ADA3500CWBOX
Operating Mode 32/64
Stepping F2
Frequency 2200Mhz
HT Speed 2000
Voltage 1.25/1.35/1.40V
Max Temp 70°C
Thermal Power 62W
L1 Cache 128KB
L2 Cache 512KB
CMOS Technology 90nm SOI
Socket Socket AM2