Hi, I use the utility RMClock from =

http://cpu.rightmark.org/products/rmclock.shtml. For my Athlon Mobile is =

work fine. But it is compatible with Intell processors too.

*RightMark CPU Clock Utility (RMClock)* is a small GUI application =

designed for real-time CPU frequency, throttling and load level =

monitoring and on-the-fly adjustment of the CPU performance level on =

supported CPU models via processor's power management model-specific =

registers (MSRs). In automatic management mode it continuously monitors =

the CPU usage level and dynamically adjusts the CPU frequency, throttle =

and/or voltage level as needed, realizing the "Performance on Demand" =

concept.

Current release of RMClock utility implements the CPU frequency, CPU =

load and throttling level determination on the following processor models:

    * AMD K7 (Athlon/XP/MP, Duron, Sempron) and K8 (Athlon 64/FX/X2,
      Opteron, Dual-Core Opteron, Sempron, Turion 64/X2) family processors.
    * Intel Pentium II/Celeron, Pentium III/Celeron, Pentium M/Celeron
      M, Pentium 4/Celeron (Northwood and Prescott cores), Pentium 4
      Extreme Edition (Gallatin and Prescott cores), Xeon (Prestonia,
      Nocona, Cranford, Irwindale, Potomac, Paxville and Dempsey cores),
      Pentium D and Pentium Extreme Edition (Smithfield, Presler and
      Cedar Mill cores), Core Solo/Celeron M/Core Duo (Yonah core) and
      Core 2 Duo/Core 2 Quad/Core 2 Extreme/Xeon (Conroe/Allendale,
      Merom, Woodcrest, Kentsfield/Clovertown cores).



Apptech a =E9crit :
> Summary:
>
> How hard to UNDERclock an Intel laptop processor?
>
> ____________________
>
> A new laptop is in the offing.
> Minimum spec is "IBM compatible", dual core processor, 1 GB
> RAM, 100 GB HDD.
> PLUS - Longest possible battery life.
> AND    Small and light is good
>
> More or less as appropriate always good.
> Target price not over about $US1200.
>
> Uses will (of course) be varied but an  essential role is
> the capability to load photos from a Flash card while
> displaying slide shows or image manipulating. This is the
> main reason that dual-core is essential - it's not the extra
> speed (which helps) but the fact that, at least for the
> software I use, partitioning the two tasks one per processor
> makes a vast difference wrt running them on even the fastest
> of single processor systems. And, I don't wish to change my
> software.
>
> Any number of 'notebooks' meet the spec until light and
> long-battery-life are added.
>
> The 12.1" VAIO family do this superbly but get very
> expensive as the spec gets acceptable.
> Down to about 1.2 kg and 6 to 7 hours battery life in "slow"
> mode.
>
> The 12.1" HP (possibly some being made for them by ?ACER?)
> are excellent on weight but only OK on battery life.
>
> It seems to me that if I could massively underclock and
> undervoltage the CPU and run the backlight not too too
> bright that I should be able to obtain similar to VAIO
> results. Obviously speed will fall with underclocking but as
> long as clock speed is easily altered this is not an issue,
> and even if it took a reboot it would still probably be
> acceptable.
>
> Which leads to the question:
>
> AMD processors are, I read, all capable of being
> underclocked and under voltaged as they all use the same
> control, IC with this capability and there are utilities
> which perform this task well.
>
> BUT Intel processors are reportedly inconsistent in their
> ability to be underclocked.
>
> Can people comment on the issues involved ?:
> what it takes to be able to underclock and under voltage an
> Intel CPU,
> is it always possible,
> are there gotchas,
> have people done it ,
> did it work OK,
> and reliably,
> should I buy an AMD based laptop if this is a core (no pun
> quite intended) issue.
> ?????????????
>
>
>
>             Russell
>
>
>
>   =


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