Re: Windows 10 and 11 power state habits: shutdown, sleep or hibernate

On Mon, 1/26/2026 9:10 AM, Frank Slootweg wrote:
> Maria Sophia <[email protected]> wrote:

>> I'm not going to dig further (because I don't want hibernation anyway), 
>> but I do thank you for asking me to dig deeper to confirm it does exist.
> 
>   Quite understandable, no point spending too much time on something
> you're not going to use.
> 
>   It would be interesting to see if sleep (manual or timed) works on
> your system and if so, which parts of the system are (not) powered down,
> i.e. when sleeping, is the monitor off/blank? are the disks not
> spinning? is the fan not spinning?, etc.. Normally only the power supply
> should be up a bit, in order to maintain the content of the RAM.
> 

S3 Sleep uses +5VSB, and the power supply makes that with no fan running.
It makes +5VSB @ 2.5A or +5VSB @ 3A and that amount of power helps to
cover off the auto-refresh requirement of the DIMMs. If you plug in
too many iPhones to charge up while the computer sleeps, you could
overload +5VSB and the voltage could drop to zero. Then your S3 Sleep
is lost. Some machines have a single, specially marked port for charging.

If a machine is set for hybrid sleep, that is S3 plus a hiberfile,
and losing power isn't as much of an issue. if your iPhone charging
tips over an ATX PSU on a sleeping desktop, the session is
still recoverable (via hiberfile).

   Paul