Undervolting the AMD Turion 64 ML-34 processor (L2000)

[chinna_n]

And yes, I'm not lying. The result was real

1 thing to discuss here is that the (2 times) increased battery life is when the CPU is running at full speed.
I think the battery life will not be that much increase for idle/minimal speed because, as you can see

maximun VID reduce from 1.45 (or 1.5?) to 1.05. That's 0.4+V reduced.
minimum VID reduce it from 1.0 to 0.9 (only 0.1V reduced)

so I don't think it will be much diferent if we run the notebook at half speed all the time. The battery life should be a little bit longer but not much longer.

What are the setting you have in RM Clock for Battery Profile (minimal and Power Saving level).?

What I observed is CPU clock would not increase CPU speed with artificial loads like Prime95/battery eater pro with the above settings. So proc runs at minimal speed though it is taking 100% CPU.

Another thing is, in your case voltage difference between Min and Max is not that much, so your power consumption difference is only about 10 watts from 800Mhz to 1600Mhz.

[breezie]

pompoko, how does this affect your cpu temps? does your fan turn on significantly less doing simple processes (web browsing, etc)?

[pompoko]

The profile in my RMclock

Battery Profile : Automatic management
Battery mode : Power saving LV4

and I set the windowXP's power management to Home/Office desk so it won't interfere with the RMclock's CPU stepping management. (no double stepping just in case)

The CPU clock did run to 1.6Ghz if the applications requested for hard load. I checked with
1. Mobile Meter
2 AMD's Power now! dashboard
3.The RMclock itself

They all reported that my CPU is 100% load and is running at 1600Mhz so I think it's no mistake.

The AMD Powernow! dashboard also show that my Battery savings guage is more than 50%.

I'll include the pictures about before running Battery eater and after running the Battery eater.

And about the CPU temp. It's around 50 C. but the fan didn't turned on so often when running at full speed like before underclocking.

[chinna_n]

The profile in my RMclock

Battery Profile : Automatic management
Battery mode : Power saving LV4

If you want to generate lowest heat while running on battery, select Battery Profile: minimal. This way CPU speed do not jump around too much.

[InIrudeBwoy]

Here are some more numbers I am able to attain after doing some more UNDERVOLT experiments.

10x@1.225v
9x@1.150v
8x@1.050v
6x@0.975v
4x@0.925v

i got the same cpu that you have but i couldn`t get same numbers. Using your number i had BSOD all the time i had to raise them about 0.050. what exact kind of cpu you have? what serial number or something. or maybe you know something about different models of ml-37...

thanks

[chinna_n]

i got the same cpu that you have but i couldn`t get same numbers. Using your number i had BSOD all the time i had to raise them about 0.050. what exact kind of cpu you have? what serial number or something. or maybe you know something about different models of ml-37...

thanks

I do not know the processor serial number. Each processor is unique, some do verygood at UNDERVOLT, some hardly support any UNDERVOLT. This is just luck. In another thread one guys was able to run his processor at 0.90v @4x and 1.05v@8x that too for ML-28. Which are I think extremely good( from default 1.45v to 1.05v!!).

Even if we know the Proc serial number, there is nothing much we can do. It is not like desktop where you can buy MB and processor separately.

I am sorry I could not help much. I too got crashes when I tried 0.90v@4x and 1.20v @10x, where as blksnake was able to do verygood.
Sorry.

[pompoko]

In another thread one guys was able to run his processor at 0.90v @4x and 1.05v@8x that too for ML-28. Which are I think extremely good( from default 1.45v to 1.05v!!).

That happens to be me?

So far no crash no reboot. It's just as stable as the normal voltage (with no performance loss.). I can still finish loading DOTA map at the same time as before underclock.

Now, for me high load or minimal load is kinda the same
because...
high load = 1.05V
minimal load = 0.9V
difference is only 0.15V which is a small number IMO

What I need to know now is that 4 hours battery life (full load nonstop) from a 12 cells LION battery is good? I expected for it to be like 5 hours+ (greedy ) anyone has info about this?

[chinna_n]

What I need to know now is that 4 hours battery life (full load nonstop) from a 12 cells LION battery is good? I expected for it to be like 5 hours+ (greedy ) anyone has info about this?

At full load a 6 cell will not last more than 1:10 min to 1:20min min. So for 12 cell it should not be more than 2:20-2:40min is what one should expect.

And you are getting 4 hours and not satisfied!!?

[pompoko]

At full load a 6 cell will not last more than 1:10 min to 1:20min min. So for 12 cell it should not be more than 2:20-2:40min is what one should expect.

And you are getting 4 hours and not satisfied!!?

lol I must be too greedy

so my guess is that if I do normal works it should last like 4:30-5 hours (maybe) because as you all know.... my high and low voltage are so close. and HP's spec that a 12 cells will last at the maximum of 7 hours (in an ideal test environment) for a V2000. So in real life it should be 5:30-6 hours at best.

In conclusion. I guess a Turion64 cannot beat a Centrino at battery life. no matter how hard we try?

*** I love Turion because centrino's logo looks cheap (it looks more like an airline company's logo more than a technology logo). Funny reason eh?

BTW Chinna_n u live in Seatle? I'm in Bellevue but I go to work in Seattle every day. maybe we walked pass each other every day? lol

[vassil_98]

Here's what I could get of Turion ML 34 1,8 ghz 1mb l2 cache, l2005.
4x - 0.925 (white and blue lines at 0.9)
9x - 1.225 (at 1,2 Prime95 torture test failed after a while; the notebook did not show any other signs of instability!?)

I created an intermediate step 6x, which RMClock automatically calculated at 1.050. I'm wondering if I should try removing the automatic calculation and try to lower this one? Further, should I create one more intermediate step, say 8x? I'm not sure what the benefit of intermediate stepping is as I cannot see the processor going above 800mhz (I've put the AC Profile at Minimal, as explained in the "V2000z fan problem" thread. Chinna_n, did you say that RMClock seems to distinguish between testing and continuous load?