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Some have asked me it CPUidle will help Windows NT. Apparantly not. See
quote below from:
http://www.benchtest.com/cooler.html
The Cooler Programs
How do these programs work? Basically by executing an "HLT" instruction to
the processor to
put itself into a suspend mode when it is not actively computing. Windows
NT and many
non-MS operating systems do this as a normal procedure. Windows 95 and
Windows 98 do
not. The HLT instructions offer the benefit of less power consumption when
the CPU is idle and
no benefit when the CPU is actively processing. However, many tasks do not
require the CPU
to be computing constantly and this is when these programs go to work.
The methods of enabling the suspend mode differ between CpuIdle and
Waterfall/Rain.
CpuIdle uses a virtual device driver (VxD) and Waterfall and Rain do not.
(The latest versions of
CPUIdle use either depending of the mode you choose.) With all three
programs, the
instructions are carried out in the Ring0 level of the processor's
architecture. Ring0 is the most
privileged ring of the architecture. While the majority of people using
these programs are not
experiencing problems, it is quite possible for programs written to run in
this privileged ring to
adversely affect how other programs run.
Charles Kaucher
When you come to the fork in the road, take it.
-- Yogi Berra
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