How to slow down the CPU on a Thinkpad T61?
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From: BillW50 on 31 Mar 2008 14:40 In news:V6WdnaJD0ZJ6a23anZ2dnUVZ_g2dnZ2d(a)giganews.com, Joe Kappus typed on Mon, 31 Mar 2008 09:36:23 -0500: > Don't top post please. > > You aren't undervolting the entire laptop, just the CPU. You can do > this driver-level in linux or by using an application such as Notebook > Hardware Control on windows. > > Joe Notebook Hardware Control is pretty cool Joe! Thanks for the tip. I found it if anybody else is interested at. http://www.pbus-167.com/nhc/nhc.htm#anchor_download -- Bill
From: BillW50 on 31 Mar 2008 15:28 In news:84d4pa94ji(a)news.giganews.com, Todd H. typed on Mon, 31 Mar 2008 12:39:13 -0500: > igorr(a)ifi.uio.no (Igor V. Rafienko) writes: > >> [ Synapse Syndrome ] >> >> [ ... ] >> >>>>> See if you can undervolt, you can get a pretty good power >>>>> savings doing this. > > You can also get a pretty good unpredictable failures this way too. Temporary or permanent, Todd? -- Bill
From: Todd H. on 31 Mar 2008 16:06 "BillW50" <BillW50(a)aol.kom> writes: > In news:84d4pa94ji(a)news.giganews.com, > Todd H. typed on Mon, 31 Mar 2008 12:39:13 -0500: >> igorr(a)ifi.uio.no (Igor V. Rafienko) writes: >> >>> [ Synapse Syndrome ] >>> [ ... ] >>> >>>>>> See if you can undervolt, you can get a pretty good power >>>>>> savings doing this. >> You can also get a pretty good unpredictable failures this way too. > > Temporary or permanent, Todd? Temporary. You won't hurt digital electronics with undervoltage but you can make them not work reliably. Overvoltage is where you can get into some destructive modes. -- Todd H. http://www.toddh.net/
From: Joe Kappus on 31 Mar 2008 10:36 On Sun, 30 Mar 2008 23:16:00 -0400, Ben Myers wrote: > How does one "undervolt" a laptop??? Sounds nice and green to me. > How do I do it, and what are possible side effects and risks, if any? > ... Ben Myers > > On Fri, 28 Mar 2008 09:26:37 -0500, Joe Kappus <joecool1029(a)gmail.com> > wrote: > >>On Fri, 28 Mar 2008 08:16:26 +0000, mike wrote: >> >>> Bruce W.1 wrote: >>>> I bought a Lenovo Thinkpad T61 with a 2.4 GHz CPU. The Lenovo sales >>>> guy said there was a setting to slow down the CPU, but I sure can't >>>> find it. >>>> >>>> In the past I've never had a problem controlling the CPU speed on my >>>> AMD machines, in the BIOS. No problem. >>>> >>>> I'd like the ability to slow it down to reduce power consumption >>>> while running on batteries. Maybe this is an obsolete notion with >>>> Windows XP's power saving features, but I doubt it. >>>> >>>> Does anyone know how I can slow down the CPU to, say, 1.5 GHz? >>>> >>>> Thanks for your help. >>> download mobilemeter. >>> It graphs power consumption and processer speed. I found that on my >>> ancient Toshiba P3, I couldn't do anything in the power settings to >>> substantially reduce idle power. I could substantially reduce peak >>> power, but there's an argument that running a task twice as long at >>> half the speed consumes way more power than just letting it run full >>> bore. mike >> >>See if you can undervolt, you can get a pretty good power savings doing >>this. >> >>Joe Don't top post please. You aren't undervolting the entire laptop, just the CPU. You can do this driver-level in linux or by using an application such as Notebook Hardware Control on windows. Joe
From: Joe Kappus on 31 Mar 2008 18:29
On Mon, 31 Mar 2008 15:06:42 -0500, Todd H. wrote: > "BillW50" <BillW50(a)aol.kom> writes: > >> In news:84d4pa94ji(a)news.giganews.com, Todd H. typed on Mon, 31 Mar 2008 >> 12:39:13 -0500: >>> igorr(a)ifi.uio.no (Igor V. Rafienko) writes: >>> >>>> [ Synapse Syndrome ] >>>> [ ... ] >>>> >>>>>>> See if you can undervolt, you can get a pretty good power savings >>>>>>> doing this. >>> You can also get a pretty good unpredictable failures this way too. >> >> Temporary or permanent, Todd? > > Temporary. You won't hurt digital electronics with undervoltage but you > can make them not work reliably. > > Overvoltage is where you can get into some destructive modes. There's still people who do it in order to overclock. In any case, I've never heard of damage done by undervolting. You still do it at your own risk if you, but as mentioned before, it's really overvolting that kills. Taking the CPU down a bit is ok, I've messed with GPU's in the past but they are much more unpredictable... just don't do it. Again, the more you undervolt, the more likely it'll crash. Joe |