Apptech wrote:

> How hard to UNDERclock an Intel laptop processor?

VERY. They use various 'dynamic' cells in the CPU core to save on
transistor count. e.g. storing register values in gate capacitance.
But come flavours have good power management (shutdown unused parts
of the core).

For lowest intrinsic power, look to AMD. 60 Watts (AMD Athlon) vs 110 W for
SAME MIPS in Intel (desktop). Just look at the heat sinks to tell who is wa=
sting
more power <G>.

This link says that AMD Athlons can clock down to 50Mhz. (page 42 in pdf. p=
g 30 in document).
http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/246=
85.pdf

Have you looked at setting a very short 'suspend' or 'hibernate' time,
and having the unit wake up as needed?

Set a short 'on time' for the backlight and hit the 'ctrl' key whenever you
are actually looking at the display?

Use one of the new 'hybrid' flash + hard drive hard drives (Seagate) so tha=
t you
don't need to spin the disk at all?

http://www.seagate.com/docs/pdf/marketing/ds_momentus_5400_psd.pdf
"Power efficiency=97Laptop battery life is extended by the ability of the
Seagate=AE Momentus=AE 5400 PSD drive to power off the spin motor
and operate out of flash memory."


Most AMD based laptops come with a utility that lets you trade off power/sp=
eed/
brightness for battery life.

Robert

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