[sf-lug] will increasing RAM increase power draw during suspend-to-RAM?

[Alden Meneses]

Could it be other factors like the age of the battery? I have not changed
anything on my laptop in regards to the hardware and the battery life is not
what it used to be.

On 9/4/08, Mark K. Zanfardino <mzanfardino at gmail.com> wrote:
>
> John,
>
> This is a very good question and it brought to mind the fact that my
> laptop does not maintain it's battery life nearly as long as it had
> prior to my adding an addition 1GB SODIMM to the existing 512MB base RAM
> installed.  Prior to the expansion I could safely leave my laptop in
> sleep mode for nearly 24 hours; now it doesn't last 12.  I haven't run
> any conclusive tests to see how long it will last, but clearly there has
> been a dramatic decrease.
>
> NOTE: I wasn't looking at the RAM initial for this decrease as I've made
> a number of changes including installing a larger HD (moved from a 40GB
> 4400rpm drive to a 120GB 5400rpm drive) and installing a newer release
> of Kubuntu (I was running 7.04 and am now running 8.04.1).  It seems
> unlikely that the drive would be the issue, as it should be parked while
> sleeping.  The OS might be an issue, I guess, but I can't be sure.
> However it seems the RAM the likely suspect.
>
> I'd be interested in reading any other's thoughts on this issue.
>
> Mark
>
> John Magolske wrote:
> > When suspended to RAM, a laptop's battery is slowly drained.
> > My understanding is that this power is going towards keeping
> > the RAM active. I'm wondering how much of the total power draw
> > is is being consumed by the RAM chips. Would doubling the
> > amount of RAM from say 512MB to 1GB have the effect of roughly
> > doubling the power consumption while suspended?
> >
> > John
> >
> >
> >
>
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