Undervolting Mobile Celeron

[SpaceSquad]

So I know you can undervolt your pentium-m to get a lower clock speed and lower temps to get better battery life.

I just found out today that my Mobile Celeron 2.0GHz (Northwood, 256k, 400MHz effective fsb) can do so as well.

I am wondering how this is accomplished? And if there are any guides to undervolting? Perhaps one targeted towards Mobile celerons?

thanks for any help.

 

[mgob]

this is generally easily done within the bios...

 

[SpaceSquad]

no, there is another way....alot of people undervolt their pentium-ms to save battery life...nit using the BIOS.

besides, almost all laptop BIOS' don't allow those kinds of manipulations.

 

[Tseng]

I beleive this is what you are looking for:

RM Clock Utility

 

[Zap]

CrystalCPUID is another program for that purpose.

 

[SpaceSquad]

Thanks for the help! Yes, RM Clock was exactly what I was looking for. But unfortunately, it doesn't support the voltage adjusting for my chip. I can set the throttle and such, just can't seem to manipulate the voltage.

I will try the Crystal CPUID program at the first oppertunity. Thanks again.

 

[Hacp]

question,... WIth these utilities, can you undervolt/downclock a CELERON M (not moblile celeron)????????? Thanks.

 

[SpaceSquad]

yes. RM Clock was designed for pentium Ms (and celeron Ms...very similar technology), more than it was for mobile chips.

The people who undervolt their p-ms use RM clock. And if you can do it for the P-M, then it'll work on teh Celeron-Ms.

Btw, that CrystalCPUID is soooo awesome. I havent tried it on my laptop....but did on my athlon 64 desktop....so awesome. I can't wait to try it on my duron server...

 

[Hacp]

So if you use rm clock, then you can get similar battery life with a Celeron M compared to a Pentium M right???

 

[IvanAndreevich]

Hacp
No, because you can't lower multiplier.

SpaceSquad
Nothing will work on the Northwood Mobile Celeron because it doesn't support the transition state speeds / voltages at all.

 

[stevty2889]

Thats part of the disadvantage of the mobile celerons, they don't support any of the speedstep features, including lowering multipliers and lowering voltages. If you are brave you could always do pin mods to set the voltage lower, but that could compromise stability.

 

[SpaceSquad]

Originally posted by: IvanAndreevich
SpaceSquad
Nothing will work on the Northwood Mobile Celeron because it doesn't support the transition state speeds / voltages at all.

reaaaaaaaaaaaaaaallly....

...damn intel website...lying to me...

ah well...it gets like 3.5hours anyways...thats a fair battery life.

 

[SpaceSquad]

hey stevty2889 do you have any good guides for pin modding a mobile chip?

thanks for the help

 

[stevty2889]

I used this, it's an excellent guide for mobile celerons.

 

[Hacp]

Originally posted by: IvanAndreevich
Hacp
No, because you can't lower multiplier.

SpaceSquad
Nothing will work on the Northwood Mobile Celeron because it doesn't support the transition state speeds / voltages at all.

Thanks THAT is the answer I wanted to know .

 

[SpaceSquad]

thanks for the link.

but...celeron Ms are basicly pentium Ms (less cache and yadda, yadda....)....are you sure you can't undervolt them? Cause I think I've heard of people doing it with celeron-ms...

 

[Hacp]

I think you can undervolt them, but you cant decrease clock speeds, This means that you can't undervolt them as much as you can with a Pentium M.

 

[stevty2889]

Originally posted by: SpaceSquad
thanks for the link.

but...celeron Ms are basicly pentium Ms (less cache and yadda, yadda....)....are you sure you can't undervolt them? Cause I think I've heard of people doing it with celeron-ms...

Again, Celeron-M's lack the speedstep features, so they don't have the lower multipliers. They actualy perform quite well, there main disadvantage is the lack of power savings features for laptops.

 

[unfalliblekrutch]

another fact to mention is that pentium-m computers can generally use centrino hardware control utility or something to undervolt, which celeron-ms, mobile celerons, etc can't use bcause they arn't "centrino".