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NHC CPU Undervolting

post #1 of 14
10/27/05 at 10:52pm
Thread Starter 
Just wondering what everybody else has managed to STABLY run their CPUs at? I have noticed a massive drop in idle and max temp (will investigate exactly how much tomorrow) and gonna check out if there is any noticeable change in battery life.

CPU: Intel Pentium M Processor, 760, 2.00GHz, 533MHz FSB

6x - 800 MHz - 0.988V Default - 0.700V
8x - 1,06 GHz -
9x - 1,20 GHz -
10x - 1,33 GHz -
11x - 1,46 GHz -
12x - 1,60 GHz -
14x - 1,86 GHz -
15x - 2,00 GHz - 1.356V Default - 1.084V

Going to find the other voltages too so I can enable dynamic switching...

IDLE: 15x - 1.356V - 43
IDLE: 15x - 1.084V - 37
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post #2 of 14
10/27/05 at 11:01pm
Quote:
Originally Posted by K9387
Just wondering what everybody else has managed to STABLY run their CPUs at? I have noticed a massive drop in idle and max temp (will investigate exactly how much tomorrow) and gonna check out if there is any noticeable change in battery life.

CPU: Intel Pentium M Processor, 760, 2.00GHz, 533MHz FSB

6x - 800 MHz - 0.988V Default - 0.700V
8x - 1,06 GHz -
9x - 1,20 GHz -
10x - 1,33 GHz -
11x - 1,46 GHz -
12x - 1,60 GHz -
14x - 1,86 GHz -
15x - 2,00 GHz - 1.356V Default - 1.084V

Going to find the other voltages too so I can enable dynamic switching...
My 9300 refuses to run SuperPI on anything less than stock 1.34.

My (former) 6000D was undervolted to 0.997 running 2.13Ghz pinmodded stable.

However, temps on 9300 are even lower than on 6000D.

Idle 24-25, load 45-47.
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post #3 of 14
10/28/05 at 12:04am
Here's the entire thread on it: http://www.notebookforums.com/showthread.php?t=70943

Also, I tried NHC but it seems to be a massive RAM hog, so I went back to CHC. How's it going for you?
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post #4 of 14
10/28/05 at 12:19am
Thread Starter 
I was just after results, not 23 pages of discussion. Especially of the other multipliers, not just minimum and maximum...

As I replied to you in another thread, NHC for me is only using 1 or 2 MB more than CHC, sitting happily running everything I need at 5MB of memory usage.

How much was it using for you? Which version of NHC/.NET did you use?
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post #5 of 14
10/28/05 at 2:53am
NHC beta 3 and .NET v.2 beta (as required). Got up to 170MB for some reason which seemed ridiculous to me.
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post #6 of 14
10/28/05 at 3:03am
Thread Starter 
Wow, yeah, thats a bit much. Same versions as me though and the maximum I have managed to get it to is just under 20MB and thats be quickly flicking through everything and loading up all the extra windows, a few seconds later it was back to 5MB though...
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post #7 of 14
10/28/05 at 5:42am
I asked the same question to this forum and noone replied.

I was after stable results for the M-770 processor though
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post #8 of 14
10/28/05 at 5:50am
im kinda new to undervolting, so if i get this right... undervolting is just to lower the CPU temps? not to boost the preformance?
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post #9 of 14
10/28/05 at 6:08am
Its more then the temps.
Its batterylife. The lower you can get your cpu, the less power it needs.
Also you can even avoid using your cpu fan (800mhz @.7v low load runs fine without fans), which will increase your battery even more.
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post #10 of 14
10/28/05 at 6:44am
My 2.4GHz P-M get's down to 1.276v and Prime's forever, but I haven't tried lower yet...
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post #11 of 14
10/28/05 at 6:47am
Quote:
Originally Posted by tijgert
My 2.4GHz P-M get's down to 1.276v and Prime's forever, but I haven't tried lower yet...
What is more amazing than your CPU clock speed is that you still have your plastic covers!!!!!

We need a noobs Graphics card and CPU overclocking guide!!!!!!!!!!!!!!!!! HELP!!!!!!!!
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post #12 of 14
10/28/05 at 6:51am
I must ask this.. if someone knows..
I have undervolted my 1.86Ghz from default 1.385 or something to 1.250 something, not sure if the value is correct but almost..
I have same performance(if not even better : P ) with the low voltage... the temperature have dropped some but not very much.. shall I keep lowering it until its getting unstable or shall I stop ?
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post #13 of 14
10/28/05 at 7:37am
Quote:
Originally Posted by thecreep
We need a noobs Graphics card and CPU overclocking guide!!!!!!!!!!!!!!!!! HELP!!!!!!!!
Agreed!
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post #14 of 14
10/28/05 at 7:40am
When the system becomes unstable you are already a few steps to low on the voltage.
Simply get a copy of Prime95. Undervolt step by step and each step lower, let prime95 run for several hours (preferably over night).
This will take a considerable amount of time to do it right, but the result is worth it.
You can take a short cut of course and just lower to a voltage you hope to get and start Priming there, it'll save heaps of time.

My 2.4GHz wil do 1.86GHz at just 1.085v! You surely must be able to do the same or better.

(currently testing 2.4GHz at just 1.26v!)
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