D
David L. Jones
Guest
Jeßus wrote:
Taking a random 1GB SODIMM datasheet:
http://download.micron.com/pdf/datasheets/modules/ddr2/HTF16C128_256x64H.pdf
(not sure if it's actually compatible, but should give a reasonbale estimate
anyway)
The typical active standby current is almost 1A @ 1.8V, or 1.8W, and that's
doing nothing. Can be over 6W peak when doing stuff.
The 1000HE battery pack is around 90Wh (8700mAh @ 10.8V), so would use
roughly 10W for 9 hours. The standard 1GB SODIMM would take almost 1/5th of
that power just sitting idle doing nothing. Likely to be significantly
higher in actual use, so say the SODIMM might be as high as 30% of the
consumption.
So the double capacity SODIMM would be a fairly significant extra
consumption, and the figures would roughly match up to what Keith gets.
Dave.
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Some back of envelope calcs:In article <02e72a17$0$1328$c3e8da3@news.astraweb.com>,
nicetry@migo.com said...
keithr wrote:
snip
I'm using one now, the 10" screen is fine (1024x600) my only problem
with it is the tiny shift key.
The claimed 9 hour battery life may be a bit expectant though, I've
never managed much better than 6 hours with the screen turned down,
WiFi, camera and bluetooth turned off, and the CPU at the lowest
clock speed. Realistically with WiFi on the battery lasts 4 hours
give or take.
I have put a 2 gig DIMM in in place of the 1 gig supplied.
Probably goes some ways to explaining the decrease in battery life.
Would RAM really chew that much extra power though?
Taking a random 1GB SODIMM datasheet:
http://download.micron.com/pdf/datasheets/modules/ddr2/HTF16C128_256x64H.pdf
(not sure if it's actually compatible, but should give a reasonbale estimate
anyway)
The typical active standby current is almost 1A @ 1.8V, or 1.8W, and that's
doing nothing. Can be over 6W peak when doing stuff.
The 1000HE battery pack is around 90Wh (8700mAh @ 10.8V), so would use
roughly 10W for 9 hours. The standard 1GB SODIMM would take almost 1/5th of
that power just sitting idle doing nothing. Likely to be significantly
higher in actual use, so say the SODIMM might be as high as 30% of the
consumption.
So the double capacity SODIMM would be a fairly significant extra
consumption, and the figures would roughly match up to what Keith gets.
Dave.
--
================================================
Check out my Electronics Engineering Video Blog & Podcast:
http://www.eevblog.com