Pentium 4 (not Mobile) Power Management?

Archived from groups: comp.sys.laptops (More info?)

Hi Tom,

The Pentium IV in my HP Pavilion zd7010us runs at 2.66GHz all the time.

Ciao . . . C.Joseph

That which a man buys too cheaply . . .
He esteems too lightly

Tom wrote:
> Is it true that the (desktop) Pentium 4 processor scales down to half
> clock speed when used on battery power in a laptop, through power
> management? I'm trying to figure out whether to get a Pentium 4
> (cheaper, worse battery life, supposedly slower on battery, faster on
> AC) or a Pentium-M (more expensive, better battery life, supposedly
> faster on battery, slightly slower on AC) and I just wanted more info
> about this.
>
> Also, is this driven by the BIOS, or is it something that could be
> adjusted (with horrible effects on battery life, but adjusted
> nonetheless) in the OS?
>
> Thanks,
>
> Tom
>

Archived from groups: comp.sys.laptops (More info?)

Tom <thinkinginbinary@gmail.com> wrote:
: Is it true that the (desktop) Pentium 4 processor scales down to half
: clock speed when used on battery power in a laptop, through power
: management? I'm trying to figure out whether to get a Pentium 4
: (cheaper, worse battery life, supposedly slower on battery, faster on
: AC) or a Pentium-M (more expensive, better battery life, supposedly
: faster on battery, slightly slower on AC) and I just wanted more info
: about this.

: Also, is this driven by the BIOS, or is it something that could be
: adjusted (with horrible effects on battery life, but adjusted
: nonetheless) in the OS?

It's usually adjusted in the OS. If you are asking, "Does a Pentium 4
always go 1/2 the clock speed on a battery when in a laptop?" the
answer is mostly likely, "Probably not". My Toshiba 1415 has a
Celeron in it (a scaled-down Pentium 4) and Toshiba has power
management options you can choose on the Windows contol panel - from
full power to long battery life/slower CPU.

Andrew
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Archived from groups: comp.sys.laptops (More info?)

My Pentium 4's speed doesn't change at all on battery officially, but it
seems to me that it gets a little bit slower (only noticeable when gaming
though). However, if you get a laptop that does scale down the speed, you
could always stop that by selecting "always on" in the power management
properties.
Richard
"Tom" <thinkinginbinary@gmail.com> wrote in message
news:cdc7q8$ucg@odak26.prod.google.com...
> Is it true that the (desktop) Pentium 4 processor scales down to half
> clock speed when used on battery power in a laptop, through power
> management? I'm trying to figure out whether to get a Pentium 4
> (cheaper, worse battery life, supposedly slower on battery, faster on
> AC) or a Pentium-M (more expensive, better battery life, supposedly
> faster on battery, slightly slower on AC) and I just wanted more info
> about this.
>
> Also, is this driven by the BIOS, or is it something that could be
> adjusted (with horrible effects on battery life, but adjusted
> nonetheless) in the OS?
>
> Thanks,
>
> Tom
>

Archived from groups: comp.sys.laptops (More info?)

> Is it true that the (desktop) Pentium 4 processor scales down to half
> clock speed when used on battery power in a laptop, through power
> management? I'm trying to figure out whether to get a Pentium 4
> (cheaper, worse battery life, supposedly slower on battery, faster on
> AC) or a Pentium-M (more expensive, better battery life, supposedly
> faster on battery, slightly slower on AC)

Depends on benchmark.

At the WDS content creation benchmark, the Pentium-M is faster

http://notebook.pege.org/benchmarks/content-creation-be...


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Roland Mösl
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