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Re: Doesn't Hibernate use NO power?

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On Fri, 1/3/2025 1:26 PM, micky wrote:
> I read in an answers.microsoft.com page that Hibernate uses less power
> than Sleep.   And another page said something similar. 
> 
> Doesn't Hibernate use NO power?   After it finishes copying the RAM to
> the HDD, isn't it just like OFF?  In what way could it use power?
> 
> 
> As an aside, why does one have to enable Hibernate?  The other options,
> including sleep, restart are implemented by default. Is Hibernate to
> dangerous for a newbie to handle?
> 

After Hibernate fills disk, is Soft-Off.

The fans stop. The main DC rails (3/5/12) are off.

But, the +5VSB standby supply still runs. It powers the
Southbridge skeletal features and as Shingi points out,
there are Wake functions that require power. PME
(Power Management Event) must be ready to roll.

Using your Kill-O-Watt meter, and with minimal Wake functions
enabled, you might find a reading of 1 watt and 7VA. This means
the Power Factor PF is low, like 0.14 maybe. This means the power
is reactive, and the reactive power is not "billed".

You are being billed for the 1 watt power number, not the 7VA.

If you have a computer with EuP, then the power could be lower.
But apparently there's been some passive-resistance from the
industry to that, so don't expect it to work to reduce power.

I had hoped at one time, that the active PFC on the supply would
still be engaged, when the +5VSB SMPS is running, but that does
not seem to be the case. On the other hand, I haven't measured
all the new supplies here, and it's possible one of my candidates
will have a lower watt power when in idle state. Not that it matters.
It's just more satisfying, when hardware you paid for (APFC), actually
works.

The power company wants APFC to run, when the main rails are running
and significant reactive power might be involved. Having a bad power
factor in Soft-Off, they likely don't care about that, but the thing
is, the APFC could be left running in both S0 and S5. Maybe it has
poor responses, when the power is only 1 watt of loading, and it
might be "unstable" and has to be disabled.

Even LED lightbulbs don't have APFC, and the power factor started
off years ago as "better", but the modern $2 bulb has a poor PF.
The PF on LED is as bad as a CFL bulb now.

   Paul

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Thread

Doesn't Hibernate use NO power?  micky <NONONOmisc07@fmguy.com> - 2025-01-03 13:26 -0500
  Re: Doesn't Hibernate use NO power? T <T@invalid.invalid> - 2025-01-03 11:30 -0800
  Re: Doesn't Hibernate use NO power? Shinji Ikari <shinji@gmx.net> - 2025-01-03 20:37 +0100
  Re: Doesn't Hibernate use NO power? Paul <nospam@needed.invalid> - 2025-01-03 15:08 -0500
    Re: Doesn't Hibernate use NO power? Hank Rogers <Hank@nospam.invalid> - 2025-01-03 18:12 -0600
  Re: Doesn't Hibernate use NO power? Frank Slootweg <this@ddress.is.invalid> - 2025-01-03 20:29 +0000
    Re: Doesn't Hibernate use NO power? MikeS <MikeS@fred.com> - 2025-01-04 10:28 +0000
      Re: Doesn't Hibernate use NO power? Paul <nospam@needed.invalid> - 2025-01-04 07:15 -0500
        Re: Doesn't Hibernate use NO power? Frank Slootweg <this@ddress.is.invalid> - 2025-01-04 16:21 +0000
      Re: Doesn't Hibernate use NO power? Frank Slootweg <this@ddress.is.invalid> - 2025-01-04 16:28 +0000
        Re: Doesn't Hibernate use NO power? MikeS <MikeS@fred.com> - 2025-01-04 18:40 +0000
    Re: Doesn't Hibernate use NO power? Anssi Saari <anssi.saari@usenet.mail.kapsi.fi> - 2025-01-16 12:36 +0200
      Re: Doesn't Hibernate use NO power? Frank Slootweg <this@ddress.is.invalid> - 2025-01-16 11:23 +0000
        Re: Doesn't Hibernate use NO power? Anssi Saari <anssi.saari@usenet.mail.kapsi.fi> - 2025-01-23 11:32 +0200
  Re: Doesn't Hibernate use NO power? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2025-01-10 12:21 +0800
    Re: Doesn't Hibernate use NO power? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2025-01-10 12:22 +0800
      Re: Doesn't Hibernate use NO power? Frank Slootweg <this@ddress.is.invalid> - 2025-01-10 16:41 +0000

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