[133082] in North American Network Operators' Group
Re: Want to move to all 208V for server racks
daemon@ATHENA.MIT.EDU (Joel Jaeggli)
Fri Dec 3 22:17:26 2010
In-Reply-To: <91470.1291424330@localhost>
From: Joel Jaeggli <joelja@bogus.com>
Date: Fri, 3 Dec 2010 19:18:55 -0800
To: "Valdis.Kletnieks@vt.edu" <Valdis.Kletnieks@vt.edu>
Cc: Alex Rubenstein <alex@corp.nac.net>, NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Dec 3, 2010, at 16:58, Valdis.Kletnieks@vt.edu wrote:
> On Fri, 03 Dec 2010 13:21:07 PST, Matthew Petach said:
>> People are still feeding their gear with AC? Save on PS inefficiency,
>> and feed direct 12/5vDC to the servers. Save space, save power,
>> save cooling.
>=20
> What does that do to customer equipment choices? I've got a quarter acre o=
f
> boxes that I know want 12/5vDC inside the case, but that's not an easily
> available option from the vendor - most of the time the only option is
> autoswitching 120-240DC with your choice of power cables.
>=20
The 10,000amp bus for the 12v feed for a row of server racks would be a thin=
g to behold. I don't think anyone but Paul Wall has seriously considered thi=
s.
> (If anybody has a good TCO analysis for doing this with Dell/Sun/IBM/Apple=
> servers, I'm willing to listen...)
>=20
