Battery consumption 32 bit and 64 bit

I have purchase Lenovo Twist convertible computer with 4 gigs
non upgradable memory. It comes with 64 bit win 8 pro

It has a short battery life. I have purchased and external
battery pack that will give me 2 full charges to the computer.
(aNker Astro Pro2)

If I install 32 bit version of win 8 will it have any effect
on battery life? I have the 32 and 64 bit DVD that came from
Microsoft with win 8 upgrade promotional offer before jan 31 2013.

HS

On Sun, 15 Sep 2013 08:53:52 -0400, homosapien
wrote:


I have purchase Lenovo Twist convertible computer with 4 gigs
non upgradable memory. It comes with 64 bit win 8 pro

It has a short battery life. I have purchased and external
battery pack that will give me 2 full charges to the computer.
(aNker Astro Pro2)

If I install 32 bit version of win 8 will it have any effect
on battery life?


It will either have no effect or a very tiny effect. It's certainly
not worth doing if your objective is just to have longer battery life.

--
Ken Blake

homosapien wrote:
I have purchase Lenovo Twist convertible computer with 4 gigs
non upgradable memory. It comes with 64 bit win 8 pro

It has a short battery life. I have purchased and external
battery pack that will give me 2 full charges to the computer.
(aNker Astro Pro2)

If I install 32 bit version of win 8 will it have any effect
on battery life? I have the 32 and 64 bit DVD that came from
Microsoft with win 8 upgrade promotional offer before jan 31 2013.

HS

I don't have any proof to back it up, but I would say "No".

This test isn't exactly the best, but it's to give an idea
how important the bitness might be.

http://askubuntu.com/questions/1441/...32-bit-install

"Comparison of i386 vs i386-pae vs amd64 on
HPMini-210 (Atom 450) and ThinkPad X220i (Sandybridge)"

http://kernel.ubuntu.com/~cking/powe...-3/results.txt

Current Drawn in mA
i386 i386-pae amd64
------ -------- -----
ThinkPad X220i 883.38 867.68 871.58
HPMini210 688.16 694.72 712.10

On one platform, 1% higher. On the other, 3% lower. Hardly
worth "getting out of bed in the morning", for that kind of
improvement. And your machine uses a processor more closely
related to the ThinkPad, so power would be going in the
wrong direction. You'd be worse off, by a tiny bit. Would
a 3 minute less battery life make that much difference ?
I'm not seeing a strong case one way or the other.

*******

Their conclusion here, is it's related to the touchscreen.

http://www.engadget.com/2012/11/21/l...-twist-review/

"What's curious is that the Twist doesn't even have that much overhead,
so to speak. It's not like this is a pin-thin system, with room for just
the smallest of batteries. And it's not even powering a higher-res
display. And yet, this is the second-worst showing we've seen from
an Ultrabook. Meanwhile, the Dell XPS 12, which weighs less and has
a full HD screen, lasted more than an hour longer in the same test.
So that leaves us with a vexing question: we know touchscreens are
bad news for battery life, but why does the Twist in particular
fare so poorly?"

Tweaking for battery life, is a tricky business. And requires
the right kind of engineering talent at these companies. Any
company that rushes designs to market, could suffer from
this sort of thing. We don't really know what's broken, and
we also don't know whether design activity continues on a
given model, once it is released (like, driver update to
save power).

I don't see a particular reason for a touchscreen to be a power
hog, but then again, I would not be surprised to see multiple
generations of designs happen, before low power is realized.
On the first generation, they're more interesting in just
getting it to function without it being a PITA to use.

Things we know that suck power, are things like backlight
intensity. I presume any review site doing measurements,
adjusts for the same relative intensity. And while benchmarking,
you'd also want consistency as to whether the screen is allowed
to dim on its own or not. Proper testing is difficult,
if done by idiot reviewers. It's hard to be fair about these
things, especially if a laptop is received which is not
configured correctly as received, and needs to be tweaked
by the reviewer. Some reviewers actually ask for assistance
from the company, to show their product in the "best possible light".
If poor power consumption is noted, they should be given a chance
to deliver a list of tweaks, before the review goes live.

HTH,
Paul

In article ,
lid says...

On Sun, 15 Sep 2013 08:53:52 -0400, homosapien
wrote:


I have purchase Lenovo Twist convertible computer with 4 gigs
non upgradable memory. It comes with 64 bit win 8 pro

It has a short battery life. I have purchased and external
battery pack that will give me 2 full charges to the computer.
(aNker Astro Pro2)

If I install 32 bit version of win 8 will it have any effect
on battery life?


It will either have no effect or a very tiny effect. It's certainly
not worth doing if your objective is just to have longer battery life.


Thanks for the information.

HS

In article , says...

homosapien wrote:
I have purchase Lenovo Twist convertible computer with 4 gigs
non upgradable memory. It comes with 64 bit win 8 pro

It has a short battery life. I have purchased and external
battery pack that will give me 2 full charges to the computer.
(aNker Astro Pro2)

If I install 32 bit version of win 8 will it have any effect
on battery life? I have the 32 and 64 bit DVD that came from
Microsoft with win 8 upgrade promotional offer before jan 31 2013.

HS

I don't have any proof to back it up, but I would say "No".

This test isn't exactly the best, but it's to give an idea
how important the bitness might be.

http://askubuntu.com/questions/1441/...32-bit-install

"Comparison of i386 vs i386-pae vs amd64 on
HPMini-210 (Atom 450) and ThinkPad X220i (Sandybridge)"

http://kernel.ubuntu.com/~cking/powe...-3/results.txt

Current Drawn in mA
i386 i386-pae amd64
------ -------- -----
ThinkPad X220i 883.38 867.68 871.58
HPMini210 688.16 694.72 712.10

On one platform, 1% higher. On the other, 3% lower. Hardly
worth "getting out of bed in the morning", for that kind of
improvement. And your machine uses a processor more closely
related to the ThinkPad, so power would be going in the
wrong direction. You'd be worse off, by a tiny bit. Would
a 3 minute less battery life make that much difference ?
I'm not seeing a strong case one way or the other.

*******

Their conclusion here, is it's related to the touchscreen.

http://www.engadget.com/2012/11/21/l...-twist-review/

"What's curious is that the Twist doesn't even have that much overhead,
so to speak. It's not like this is a pin-thin system, with room for just
the smallest of batteries. And it's not even powering a higher-res


Thanks for the informative reply

I have the Windows 8 pro 32bit and 64bit DVD purchased from Microsoft
with its lovely win 8 upgrade promotion which ended January 31st 2013.

I have disabled UEFI and downloaded 64 bit and 32 bit drivers from
Lenovo.

I only have the Lenovo twist for 2 weeks. I have installed a 120 gig
ssd.

It does not take much time to do a fresh installation. It activates
automatically.

I have chosed 32 after trying 64 bit for 2 reasons.

1) On rare occasions I might need to use the computer for a dos based
data entry program for some lab work.

2) The footprint for 32 bit installation is smaller.

This computer is my "toy". I do my productive work on a desktop.

1) Large e-book reader- I love it for that.

2) Laptop to be used in hotel rooms during holidays when my wife takes
over my other small laptop to go on facebook and see all the pictures of
grandchildren :-)

The computer came with 24 gig ssd used for caching and 500 gig hard
drive.

I want to test Ubuntu on on this 24 gig ssd once there is a wireless
driver on the Ubuntu installation DVD.

HS

In article ,
says...

No difference that I can see. What eats battery life, in no particular
order, is:
a) applications loaded at boot (eg, Skype) and running in background;
b) video;
c) wi-fi, hence e-mail client and browser (which constantly send "I'm
here, what have you got for me?" messages);
d) setting screen brightness higher than it needs to be (this one can
really waste power).

Every laptop has an applet for optimising operation for different
conditions. See what it offers. On a recent trip, I disabled most
start-up programs and applets. Made a noticeable difference.

HTH


Thanks for these recommendations


There is a major complaint agaings Lenovo Twist. Short battery life.

Microsoft store has stopped carrying the swift. Lenovo Yoga appears
to be much better seller in that niche product.

All the suggestions made to prolong battery life including reducing the
brightness to 50%. This defeats my purpose as I am using it as large
e-reader. I cannot go below 75%

There is lenovo program "Settings" where there are options to prolong
battery life . (This is installed an most Lenovo tablets and laptops)

One of them is called "Battery Strech".

Quote:

" This feature will change monitors settings (brightness,dim timer, and
colour depth), decrease CPU speed,turn off optical drive,turn off
keyboard
backlight and mute audio".

HS

On Sun, 15 Sep 2013 15:00:02 -0400, homosapien wrote:

In article ,
says...

No difference that I can see. What eats battery life, in no particular
order, is:
a) applications loaded at boot (eg, Skype) and running in background;
b) video;
c) wi-fi, hence e-mail client and browser (which constantly send "I'm
here, what have you got for me?" messages);
d) setting screen brightness higher than it needs to be (this one can
really waste power).

Every laptop has an applet for optimising operation for different
conditions. See what it offers. On a recent trip, I disabled most
start-up programs and applets. Made a noticeable difference.

HTH

Thanks for these recommendations

There is a major complaint agaings Lenovo Twist. Short battery life.

Microsoft store has stopped carrying the swift. Lenovo Yoga appears
to be much better seller in that niche product.

All the suggestions made to prolong battery life including reducing the
brightness to 50%. This defeats my purpose as I am using it as large
e-reader. I cannot go below 75%

There is lenovo program "Settings" where there are options to prolong
battery life . (This is installed an most Lenovo tablets and laptops)

One of them is called "Battery Strech".

Quote:

" This feature will change monitors settings (brightness,dim timer, and
colour depth), decrease CPU speed,turn off optical drive,turn off
keyboard
backlight and mute audio".

HS

For reading an e-book, slowing down the processor shouldn't affect the
performance enough to worry baout.

If you can't go below 75% in brightness, then go to 75%. It's worse than
50%, but it is surely better than 100%.

I would like to see the final 's' back in 'homosapien', but you're the
boss :-)

--
Gene E. Bloch (Stumbling Bloch)