IBM and Dell provides tools for this on their standard installation already. I am pretty sure all others do the same - even with Linux you can set a different throttle settings for many power statuses (mains or battery powered or the if the battery is flat etc). On my IBM T42p it makes around 1hr difference if I use the lowest throttle settings or the high performance mode. Tamas On Nov 28, 2007 8:28 AM, Artem Zezyulinskiy / SEDATELEC < artemzez@sedatelec.com> wrote: > 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 > > > > > > > > > > -- > ------------------------------------------------------------------------ > Logo Sedatelec > > Artem ZEZYULINSKIY > SEDATELEC , Chemin des M=FBriers - Irigny 69540 > - FRANCE > Tel : +33 [0]4 72 66 33 26 > > > > > > > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist