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power consumption after switching off monitor

 
ramya narayanan
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Dear all,
What will be power consumption of a computer i.e. whether it will consume any power after we switch-off the monitor, eventhough the CPU is still on.
Regards.
 
Akhilesh Trivedi
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Something should have made google to come up with this :
http://www.blackle.com/about/
 
David O'Meara
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I read something that disagreed with this, but I'm too lazy to look. If I remember correctly, black and white LCD pixels have the same or nearly the same power requirements, and the 'screen backing light' has a much greater effect.
 
Satish Chilukuri
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Even if the monitor is switched off, your computer will consume power. The amount depends on what you've got inside - processor, graphics card, hard disk, cooling fans etc.. This can give a rough idea of how much power is consumed.
 
Jesper de Jong
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Originally posted by Akhilesh Trivedi:
Something should have made google to come up with this :
http://www.blackle.com/about/

"Blackle" doesn't really work with LCD monitors. Old CRT monitors do draw less power when they display a black instead of a white screen, but an LCD screen works totally differently and displaying a black instead of a white screen doesn't make any difference for the amount of power it draws.

If you really want to know how much power your computer draws, you could buy a power consumption monitor device to measure it.
 
Ernest Friedman-Hill
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Actually I'm not sure it's true that there's no difference; black pixels might actually use a bit more energy.
 
sudipto shekhar
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I think the power consumption of the monitor is greater when the whole computer is to be considered.... monitor+cpu :roll:
 
Akhilesh Trivedi
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Originally posted by Jesper Young:

"Blackle" doesn't really work with LCD monitors. Old CRT monitors do draw less power when they display a black instead of a white screen, but an LCD screen works totally differently and displaying a black instead of a white screen doesn't make any difference for the amount of power it draws.

If you really want to know how much power your computer draws, you could buy a power consumption monitor device to measure it.


Hmm... and probably LCD screen draws MORE power to go black?
[ December 17, 2008: Message edited by: Akhilesh Trivedi ]
 
Bauke Scholtz
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If a LCD is switched off would it still display black against a backlight? Don't think so. It simply does nothing.
 
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