Simple Undervolting Tutorial - Pentium M Dothan - Page 41

hi all, gonna try this tonight on my FS 3438g. one question: whilst running prime95 for those few hours to check for stability, should i leave the computer alone or can i use it as normal (ie. surfing/gaming)? tia!

i use mine as much as i can cause i wanna know it's stable... i just use the torture test to get me close, then when it runs alone ok i start running stuff with it and really put a load on it... i then move it up one notch for my peace of mind... this is how i make my living and i'm not takin' a chance on losin' data... it's worked so far :-)

thanks for the reply. im actually running it now and it seems to be running fine at 0.700v and 1.036v (crashed my computer at 1.004v and caused errors loading firefox at 1.020v). im not too sure how much benefit its doing though as im not sure what the temp was prior to undervolting... whats the best way to measure the temp - is there a nice piece of free software i can use that wont bloat up my system? thanks again

Centrino Hardware Control (CHC) Link is a program that I and many others use to undervolt. The process is the same as RMClock, but the user interface is simpler. The program also gives temp readouts, which is very convienent

thanks for that! much nicer interface on CHC - ive now deleted rmclock (disappointed there was no uninstaller...). one last question: is it best to set the cpu to max performance when on AC or is the inbuilt speed adjustment good enough to manage the system in your opinion?

there's no need, only need to uninstall the .exe... there are a few registry entries, but RMClock_WipeOut.reg, included in the zipped pkg should take care of them... i use a registry editor cause i like to know i got 'em all, but there aren't many...

All setting to max performance on A/C does is make the CPU run at it's highest clock all the time. It's kind of a waste, specifically because P-M's are made to be able to downclock. Why heat up your laptop a little more if you don't have to?

I've found setting my CPU to max does give better performance, even though the CPU is supposed to automatically clock up if needed.

And undervolting makes it a nice temp

true i suppose . just to let you know i ran tests on max 1.036v overnight (6hrs) and had no errors and im running same test again all day today whilst im at work just to be safe. temps seem to be around 53C (ish) whilst testing. not sure what it was before but its got to be better than it was, surely! finally thank you so much for this tutorial K6 its much appreciated by all and thanks to everyone whos helping others by answering questions

since i prefer RMClock to CHC, i use I9KFanGUI for temp control... great utility, more sophisticated than CHC and a cool web site too lol

ok, i know i said that was my final question but, hey
is there likely to be any performance benefit in using RMClock over CHC or vice versa? i know they'll both undervolt to the same level but i remember seeing earlier in this thread that someone was getting better temps using RMClock. :?

i wouldn't dare trust just running Prime95 as proof that a given setting is solid... i made that mistake only to have my system crash within two weeks...

from my earlier post...

Just run the system doing non-critical things to see if it'll crash. For peace of mind I always raise it a step above my tested voltage.

There is no difference between CHC and RMClock as far as undervolting capability and temps. Voltage is voltage, and the temps will be the same unless the ambient changed when switching programs.

Wow, nice temp drops I'm gonna have to give this a try! Can anyone comment on what effect this has had to the battery life of their notebook?

Not much different on idle. Load I get more, can't give you an actually number because I never did a full test, but I'd say in the neighborhood of at least 15-30 minutes.

I tried this process, but it didnt make much of a diff. There is one problem when I went about doing this. The internet connection went down. The Wireless connection works. It just doesnt receive.
Any ideas on whats wrong?
Thanks

Someone on one German forum was testing both on his MSI S260 laptop.
His conclusion was that CHC is slightly more effective. However, that time
only RMClock version 1.5 was available (later versions allow to change also all intermediate voltage steps, thus increase the effectiveness of undervolting).

w00t. i undervolted to 940/700. my temps on max went from 53 to 41!

im browsing right now at 33. this is awesome. CHC says my battery will last for 3:45 (i6000, regular battery, 1280x1024, second from highest brightness, 1.5ghz m). This is the best tweak ever.

I've been lurking for a while and just finally tried the underclocking technique...here are my findings.

HP DV1000
14.1" WXGA
Dothan 1.8ghz
768Mb RAM
Intel 855 Intergrated Graphics
6 cell and 8 cell battery
Screen +2 from lowest setting

Program Used: Centrino Hardware Control (GUI easier to use for me)
Prime95 for stability control testing.


AC Settings:
Mode: Dynamic Swtiching - I chose this setting to allow the CPU to speedstep to the
appropriate clock speed and voltage. I use to have it dialed
in on "max performance" but running the CPU at full throttle
and voltage made the laptop run at 62-65 degrees C at idle

Data: 6x - 0.700V
8x - 0.748V
10x - 0.860V
12x - 0.988V
14x - 1.020V
16x - 1.052V
18x - 1.084V

My idle temp is around 42 degrees and my full throttle temp is around 52 degrees.
BIG difference from 62-65 degrees.


Battery Settings:
Mode Used: Max battery - This mode seems to keep the core clock speed at a
constant 600mhz even at 100% useage. I like this setting
because i find it adequate for web browsing and office use.
I usually plug in if i start doing audio editing anyway.

Data: 6x - 0.700V

My idle temp is 42 degrees and max temp is around 47-49 degrees. I've gained about 35 minutes of battery life. I now reach 3:35 - 4 hours on the 6-cell and 7:55 - 8:22 hours on the 8 cell....amazing!

35 minutes doesn't sound like much but i'm all for cooler temperatures anyway. I've gained about 10 degrees celcius in cooler temps when using either CHC and RHClock. I chose CHC simply becuase i feel it looks better.

Hi everybody, anybody having trouble running CHC v1.9beta2 with non-admin rights on XP SP2? I've tried the "allow all users access to" setting but the thing won't accept admin and password. I've tried changing admin password so that it doesn't contain any numerical values and CHC still keeps saying enter valid ID and password. TIA.

P