Laptop underclockage....

[soccerballtux]

Can you underclock laptops? Which processors? For instance if I could take a Turion down to around 400MHz I might consider getting one (as opposed to a P-M). My goal is ~6 hour battery life, ~4 with wireless. 12 cell battery of course.

I've heard AMD's clocking scheme is open source or something, while Intel's is not. Would that make a difference as to clockability?

Also, assuming you can underclock a P-M, what sort of battery life increase would you get?

 

[Hacp]

I have a V2000Z with a sempron that gets 5-6 hours wireless surfing the web with the 12 cell battery

 

[soccerballtux]

HOLY CRAP!

Everywhere I've read has said they only get 2.5-3.

Any ideas why is the Turion worse? (is yours the 256 or 128KB cache version/does that even make a difference)

 

[unfalliblekrutch]

You can underclock anything, altough to my knowledge, from easiest to hardest:

P-m
turion
athlon xp-m/sempron(barton)
celery

All of those except the celery underclock automatically.


Now if you are talking about underVOLTING, then its possible on all of them too, difficulty also in that order

 

[Hacp]

Its 256kb of cache. I dunno why the people are claiming less battery life. I do turn my screen down to the lowest dim, so that might be why I'm getting such low battery life usage? I haven't spent 6 straight hours unplugged, but once I did 4 hours, and I still had around 17% left on the charge, so I would assume that it could go around another 1-2 hours.