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Author Topic: Undervolting -- my hands are thanking me  (Read 1852 times)
Armando
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« on: August 20, 2011, 10:37:55 PM »
Nothing special here. Don't laugh. But I need to share my joy.
For some reasons the last time I tried undervolting my laptop's CPU, it didn't work. I must have done something wrong (didn't have any guide). I'm really glad I tried again.

I tried to "undervolt" my laptop's CPU 2 days ago and... Success ! My CPU "idle" (well, semi-idle...) temp went from 60-65C to 40-45C. A whopping 20C. It's super stable (tested it with Orthos, prime95 and just did a lot video rendering) and I don't feel like I'm slowly cooking my hands anymore...

Not only that, but I also gained some extra "battery life" and a barely audible fan.  smiley

I followed these 2 forum posts, mainly (plus a few other more technical articles). My first setup took me 1h30 total (reading the articles, setting the apps up, testing for 45 min.):

http://forum.notebookrevi...4-undervolting-guide.html
http://www.overclock.net/...uide-intel-c2d-t7500.html

The apps you're going to need :
RM Clock Utility
Orthos

VoilĂ .
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"I suppose it can be said that I'm an absent-minded driver. It's true that I've driven through a number of red lights on occasion, but on the other hand, I've stopped at a lot of green ones but never gotten credit for it."
Glenn Gould
cranioscopical
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« Reply #1 on: August 20, 2011, 10:42:21 PM »
Nice one!

I hope it's easy to revert, come the winter  Grin
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Chris
Armando
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« Reply #2 on: August 21, 2011, 02:18:06 PM »
Quote from: cranioscopical on August 20, 2011, 10:42:21 PM
I hope it's easy to revert, come the winter  Grin

Haha! Yes... It's easy to revert. And, true actually... when winter comes, laptop heat can actually be welcome!  smiley
During Montreal summer though, it's another story, completely. onfire
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"I suppose it can be said that I'm an absent-minded driver. It's true that I've driven through a number of red lights on occasion, but on the other hand, I've stopped at a lot of green ones but never gotten credit for it."
Glenn Gould


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alivingspirit
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« Reply #3 on: August 22, 2011, 09:48:51 AM »
I guess I'm going to be doing this tonight. There goes my evening.
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mouser
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« Reply #4 on: August 22, 2011, 09:51:43 AM »
Cool stuff.. Didn't even realize this was possible.
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Armando
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« Reply #5 on: August 22, 2011, 12:20:10 PM »
Glad I'm not just rehashing something dull and already too well known.

Undervolting is so safe that it should be tried if you have a bit of time...

I should add that after undervolting, I also dismantled my laptop and cleaned the ventilation system. This also helped bringing down the temperature upper limit my CPU was reaching when left at 100% for a while. Why ? simply because, when Idle the CPU doesn't need as much ventilation, but when used at max capacity it needs a good airflow to be cooled down, even if undervolted, of course. Dust was the second culprit in my case.

... the 1h30 to understand undervolting + 45min to clean my laptop was some well spent time.  smiley

Your mileage may vary... It seems that I'm lucky to have such a drastic reduction in temperature. A reduction of 8-10C seems to be pretty common though and it does make a "feelable" difference. Not to mention the slightly extended battery life (both in terms of "how long will I be able to work on single charge" and "how long will my battery lasts until I need a new one"... Since heat degrades batteries.) AND the noise reduction. This last aspect makes the operation interesting for desktop computers too.
« Last Edit: August 22, 2011, 12:23:18 PM by Armando » Logged
"I suppose it can be said that I'm an absent-minded driver. It's true that I've driven through a number of red lights on occasion, but on the other hand, I've stopped at a lot of green ones but never gotten credit for it."
Glenn Gould
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« Reply #6 on: August 22, 2011, 01:19:26 PM »
I really need to look into this. The touchpad on my netbook gets so hot these days it feels like my fingertip is burning off.

Thanks! Thmbsup
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