From owner-freebsd-hackers  Thu Sep 27 23:38:32 2001
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From: Søren Schmidt <sos@freebsd.dk>
Message-Id: <200109280638.f8S6cKI40211@freebsd.dk>
Subject: Re: power supplies
In-Reply-To: <3BB40D0B.7000008@yahoo.com> "from Jim Bryant at Sep 28, 2001 00:39:23
 am"
To: kc5vdj@yahoo.com
Date: Fri, 28 Sep 2001 08:38:20 +0200 (CEST)
Cc: kbstew99@hotmail.com, Dan <dphoenix@bravenet.com>,
	freebsd-hackers@FreeBSD.ORG
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It seems Jim Bryant wrote:
> Kent Stewart wrote:
> 
> > There are problems with PSes when you use NICs with wake up
> > capability. The NIC may exceed the capability of one of your low
> > amperage voltages.
> 
> How much current can wake-on-LAN take?  I wouldn't think it would be enough to overload a power supply unless it overloaded the -12V 
> line which is usually only rated in the mils.  What is the average 12V rating?  5-8 amps?  and even more for 5V?  I forget what the 
> average -5V line is rated.

The problem is the +5 standby supply. In a modern ATX evironment lots
of stuff pull power on that rail when the machine is switched off,
and most ATX supplies only can delive .5-.7 amps here which can easily
be overwhelmed.

BTW you all know that you ATX machine use about 25W even when switched
off right ? This gets into real money if you have a handfull of machines,
and you get absolutly nothing for it :)

-Søren

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