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Simple Undervolting Tutorial - Pentium M Dothan - Page 19

post #361 of 1202
6/19/05 at 3:03am
Quote:
Originally Posted by ofelas
YuriSEAL - let me restate my question - if the DEFAULT min. clock is .700, that's OBVIOUSLY not too low; will I cause any stability problems if I leave the RMClock min. clock as .700?
Pretty much that simple.
If it's there already, it probably won't cause stability problems. The stability problems are usually not at all difficult to notice, as they're generally quite severe (BSOD.)

I hope that the next version of CHC has a better interface for locking your processor at specific multipliers for voltage testing. I'd like to run Prime95 for a good thirty minutes on each of these settings, but it'd take quite a bit of reorganization (you can only force it to use the minimum and maximum multipliers, as well as - I think - the top one in the list.)
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post #362 of 1202
6/19/05 at 11:10am
YuriSEAL - thanks for that clarification; have you tried Centrino Hardware Control? Seems to be a clear GUI, with a built in "stability benchmark" built in.
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post #363 of 1202
6/19/05 at 6:26pm
I'm about to give this a shot on my laptop, should I use RM clock or the Centrino Hardware Control? Which one is better? Thanks.
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post #364 of 1202
6/19/05 at 6:37pm
i think rm clock is more robust
chc is still very buggy for me
and it uses more resources
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post #365 of 1202
6/19/05 at 6:40pm
im new to this undervolting. I used CHC and it is pretty straight forward. I got a Pentium M 740 which is the 1.73 GHz. My 6x multiplier is at .700 v and my 13x multiplier is at 1.084 v. Its been running stable for the past ew hours. i got an 8x one which i dont know what it does or when it comes into play at 0.0860v. If i were you, I'd test the 6x at a high voltage like .8 or .9 before you get to .7 just for stability issues.
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post #366 of 1202
6/19/05 at 7:01pm
Quote:
Originally Posted by Torell
i think rm clock is more robust
chc is still very buggy for me
and it uses more resources
I'll try it with RM Clock, thanks!
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post #367 of 1202
6/19/05 at 7:44pm
So far my settings are Max VID .988V and Min VID .716V, running Prime95 at the moment.
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post #368 of 1202
6/19/05 at 10:07pm
Quote:
Seems to be a clear GUI, with a built in "stability benchmark" built in.
I like it. Its working great for me. My system is stable at a minimum of 0.812v. I plan to test it with a few lower ones, but 0.700v crashed my system.
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post #369 of 1202
6/19/05 at 10:34pm
Quote:
Originally Posted by ofelas
YuriSEAL - thanks for that clarification; have you tried Centrino Hardware Control? Seems to be a clear GUI, with a built in "stability benchmark" built in.
CHC stands for Centrino Hardware control. The stability benchmark is flawed. I realize this because I ran the full test overnight (it probably looped three or four times) and I didn't get a single crash...But my computer has crashed three times since then, with every characteristic of the crash being identical to that of the crashes I got from setting the voltage too low in CHC.

I like the idea of locking the multiplier and running Prime95 because that allows me to detect hardware failures PRIOR to the crashes.

And I don't run RMClock for a few reasons. One of which is the fact that it only seems to support voltage setting for the minimal and maximal clock, although it still seems to use the full range of potential clock settings. The other is that I like the temp display on CHC.
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post #370 of 1202
6/20/05 at 2:28am
My CPU Load always displays 97%+ on the RM Clock, is this normal? Is it supposed to be this high?



Please help, thanks.
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post #371 of 1202
6/20/05 at 2:35am
Quote:
Originally Posted by Allan
My CPU Load always displays 97%+ on the RM Clock, is this normal? Is it supposed to be this high?



Please help, thanks.
my rightmark utility shows very high cpu usage all the time.. i think it is really wrong...

i check my CPU usage by doing alt ctrl del and go to performance tab under CPU usage
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post #372 of 1202
6/20/05 at 2:38am
I also noticed that too, I was just worried that RM clock would make the CPU clock at max all the time. Thanks.

Do you leave your profile in Automatic Management or Minimal?
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post #373 of 1202
6/20/05 at 12:00pm
Quote:
Originally Posted by Allan
My CPU Load always displays 97%+ on the RM Clock, is this normal? Is it supposed to be this high?

Please help, thanks.
Consult Readme file that came with RMClock. This is 'normal' for some latops. What you have to do is check "Run HLT command when OS is idle" on the Management tab. Then RMClock will recognize CPU load properly. Unfortunately, in order to do that, RMClock will run a separate special process, and that process will show 100% CPU in Windows Task Manager. No worry though, it does not slow down your laptop at all.

It's funny that the author of RMClock cannot workaround CPU load measuring - the author of Centrino Hardware Control has no problem at all in that area. Hmm
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post #374 of 1202
6/20/05 at 12:08pm
Quote:
Originally Posted by YuriSEAL
CHC stands for Centrino Hardware control. The stability benchmark is flawed. I realize this because I ran the full test overnight (it probably looped three or four times) and I didn't get a single crash...But my computer has crashed three times since then, with every characteristic of the crash being identical to that of the crashes I got from setting the voltage too low in CHC.
When you run stability benchmark in CHC, the text in window specificaly tells you that it's just a rough benchmark and is not a complete test by any means. It also recommends to use Hot CPU ... or Prime 95 tests. The author of CHC is completely honest with you there.

The best way to test undervolting in CHC is to set multiplier and VID for custom setting #1 and then check the checkbox below to use only setting #1. Then run continuous Prime 95. Repeat for all multipliers that you gonna use (hint: search help file for typical voltage for your processor, there you'll find multiplier values too. For instance, Sonoma 2.00 GHz uses multipliers 6, 8, 9, 10, 11, 12, 14, 15).
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post #375 of 1202
6/20/05 at 12:35pm
Quote:
Originally Posted by DarthAcer
For instance, Sonoma 2.00 GHz uses multipliers 6, 8, 9, 10, 11, 12, 14, 15).
Wellllll! That sheds a ray of light on the odd multiplier numbers I was seeing in SpeedSwitch. I couldn't figure out why certain numbers never came up, yet it wasn't always even numbers. I didn't realise the CPU only uses certain multipliers.
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post #376 of 1202
6/20/05 at 2:10pm
Quote:
Originally Posted by DarthAcer
...For instance, Sonoma 2.00 GHz uses multipliers 6, 8, 9, 10, 11, 12, 14, 15).
lol yeah, glad somebody reads the documentation...
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post #377 of 1202
6/20/05 at 10:41pm
Quote:
Originally Posted by mitchello
I plan to test it with a few lower ones, but 0.700v crashed my system.
I have been using it at 0.780v and it is stable. Might try a little lower, but it works fine at that voltage.
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post #378 of 1202
6/20/05 at 10:52pm
rmclock goes through the multipliers and uses the voltages correctly for each step
inbetween my set max and min, did you not notice?
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post #379 of 1202
6/21/05 at 5:15am
Great,

i read the post
i began to become hopefully
i tried
i failed
and now my CPU is still getting overheated during hot days.

Is it possible that P4 Northwood processors cant do this trick?
I mean, if almost everyone can do it, even AMD's. Then why not me?
please help me!
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post #380 of 1202
6/21/05 at 5:28am
note the thread title: Simple Undervolting Tutorial - Pentium M Dothan P4s don't have speedstep
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