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

[Alphafox]

if it crashes, up the voltage slightly till it doesnt lock up...

[vassil_98]

After all these tests and undervoltage, can anyone say by how much the battery life increased in minutes? In another post, a guy said his L2000 with a 12 cell battery last 30 min longer than before. Does this mean that the 6 cell battery will make it to 3 hours or at least be close?

[chinna_n]

After all these tests and undervoltage, can anyone say by how much the battery life increased in minutes? In another post, a guy said his L2000 with a 12 cell battery last 30 min longer than before. Does this mean that the 6 cell battery will make it to 3 hours or at least be close?

If you are just browsing or using word and cpu is running at lowest step it may not add more than 5-10 min I think.

But if your CPU is jumping around a lot going above lowest settings you may well able to add more than that.(First thing I did is removed/uninstalled every dam thing HP Installed on it )

Please see this thread for more details in how much you can save
http://forum.notebookreview.com/show...85#post1152685

The standard battery rated in around 53Whr if I remember correctly, and supposed to run for around 3 hours assuming battery is holding full charge.

Infact I am able to stretch it to 3 hours(Plus/Minus 10 min).
Mine is V2000z with ML-37, running at 0.95v at 800Mhz, 1.25v at 2000Mhz and RM CPU is set to Minimal and created 7 mulitpliers(4x to all way to 10x). Fan never came on, not even once in 3 hours!

Hope this helps and let us know if your UNDERVOLTing helps you increase battery life.

[chinna_n]

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

These are the stable voltages I got. I ran Prime95 atleast an hour against each voltages.( 6 hours at 4x and 6 hours at 10x).

Based on my calculations, at these voltages my CPU may be consuming around 16 or 17 watts at 8x(1600Mhz which is equivalent to ML-30 but at 16-17 watts ) at full load at that stepping.

In all these tests temp never raise more than 55 C, which is when Fan kicks in and stops at 50 C. ( Room Temp around 70F). Even at 10x with full load fan never need to run continuous.

While browsing and word editing, fan never came on.

Sigh! Relief, my previous toshiba with P4 2.66Ghz has fan keep coming every minute even when just browsing. Bottom used to get hot after some time.

[Johan97]

Hi all,
I have recently bought an Acer 5021 with a turion 1.6gHz cpu and I can´t seem to be able to undervolt the cpu using RightMark cpu utility.

The fid and voltage fields are grey and I can´t change their values.

I have the latest amd drivers and I am logged in as an admin.

Does anyone know what could be the cause of this?

Thanks in advance,
Johan

[chinna_n]

Hi all,
I have recently bought an Acer 5021 with a turion 1.6gHz cpu and I can´t seem to be able to undervolt the cpu using RightMark cpu utility.

The fid and voltage fields are grey and I can´t change their values.

I have the latest amd drivers and I am logged in as an admin.

Does anyone know what could be the cause of this?

Thanks in advance,
Johan

I hope you already figured out how to do it. If not, go to manangement tab, check the use P-Satet Transitions(PST) option. Click on Add button , on the popup windows select the multiplier and voltage. By default it calculates voltages for all intermediate states.

In the management tab you can select Performance/power profiles for AC and Battery operation. Minimal means it will try to run CPU at lowest mulitplier, but increases the speed when required. At Maximal, it runs at full speed irrespective of load.

Anyways, best of luck with your undervolting, and let us know your results.

[pompoko]

Mine is AMD Turion ML-28 (lowest one I know. But I'm poor )

I made
FID 4.0X VID 0.900V and FID 8.0X VID 1.050V
so far it works just fine. No reboot no crash.

I made 4.0X 0.875V and 8.0X 1.025V. it worked but the windows will restart for no reason in like about 2 hours of use.

So I tried to raise them 1 step higher and now it's very stable(with so much power saving ^^).

2 hours of 3D game (warcraft3 battle.net) 4 hours of web surfing and 2 hours of burning roms and watching Anime. That's total of 8 hours usage and no problem so far

test results
I used Battery Eater '05 Pro to test the battery life by making the CPU and GPU run at full speed (Open GL render)

Tested Notebook
Compaq Presario V2000z
CPU AMD Turion64 ML-28
RAM 1Gb (2x512) DDR PC2700
HDD 60Gb 5400RPM
12 cells LION battery
Wireless Lan Disabled

Before Underclock = 131 Minutes
After Underclock = 240 Minutes (That's 4 hours )

[vassil_98]

240 min. uhaaaa!now we're talkin'

[chinna_n]

Mine is AMD Turion ML-28 (lowest one I know. But I'm poor )

I made
FID 4.0X VID 0.900V and FID 8.0X VID 1.050V
so far it works just fine. No reboot no crash.

I made 4.0X 0.875V and 8.0X 1.025V. it worked but the windows will restart for no reason in like about 2 hours of use.

So I tried to raise them 1 step higher and now it's very stable(with so much power saving ^^).

2 hours of 3D game (warcraft3 battle.net) 4 hours of web surfing and 2 hours of burning roms and watching Anime. That's total of 8 hours usage and no problem so far

test results
I used Battery Eater '05 Pro to test the battery life by making the CPU and GPU run at full speed (Open GL render)

Tested Notebook
Compaq Presario V2000z
CPU AMD Turion64 ML-28
RAM 1Gb (2x512) DDR PC2700
HDD 60Gb 5400RPM
12 cells LION battery
Wireless Lan Disabled

Before Underclock = 131 Minutes
After Underclock = 240 Minutes (That's 4 hours )

WOW! These are the best UNDERVOLT figures I saw for Turion. And 4 hours of battery life!! WOW. I am feeling dizzy now!!

Congrats for excellent chip you have!!

[pompoko]

WOW! These are the best UNDERVOLT figures I saw for Turion. And 4 hours of battery life!! WOW. I am feeling dizzy now!!

Congrats for excellent chip you have!!

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.