nanog mailing list archives
Re: Want to move to all 208V for server racks
From: Jay Ashworth <jra () baylink com>
Date: Sat, 4 Dec 2010 00:33:46 -0500 (EST)
----- Original Message -----
From: "Jima" <nanog () jima tk> On 12/3/2010 9:25 PM, Matthew Petach wrote:(OK, so it's not as practical when you have other customers to worry about... but it might not be so crazy when you're looking at the efficiency numbers for 100,000 small 1u power supplies vs a set of much larger ones.)Particularly if you're running your AC power through UPSes -- especially online ones (where there's a constant AC-DC-AC conversion happening). Go to DC for the batteries, never come back. It's a tempting notion.
And in fact, much carrier class equipment can be had with -48V power, there are ATX and similar power supplies for PCs that are -48, and I *think* I've commercial small UPSs (<3kVa) that give with -48 as well... using 48V battery strings, obviously. Cheers, -- jra
Current thread:
- Re: Want to move to all 208V for server racks, (continued)
- Re: Want to move to all 208V for server racks Valdis . Kletnieks (Dec 03)
- Re: Want to move to all 208V for server racks Joel Jaeggli (Dec 03)
- Re: Want to move to all 208V for server racks Matthew Petach (Dec 03)
- Re: Want to move to all 208V for server racks Joel Jaeggli (Dec 03)
- Re: Want to move to all 208V for server racks Adrian Chadd (Dec 03)
- Re: Want to move to all 208V for server racks Owen DeLong (Dec 03)
- Re: Want to move to all 208V for server racks Gary Buhrmaster (Dec 04)
- Re: Want to move to all 208V for server racks Jima (Dec 03)
- Re: Want to move to all 208V for server racks Joel Jaeggli (Dec 03)
- Re: Want to move to all 208V for server racks Jima (Dec 03)
- Re: Want to move to all 208V for server racks Jay Ashworth (Dec 03)
- Re: Want to move to all 208V for server racks Michael Loftis (Dec 04)
- Re: Want to move to all 208V for server racks Jay Ashworth (Dec 04)
- Re: Want to move to all 208V for server racks Michael Loftis (Dec 04)
- Re: Want to move to all 208V for server racks Ingo Flaschberger (Dec 04)
- Re: Want to move to all 208V for server racks Kevin Oberman (Dec 04)
- Re: Want to move to all 208V for server racks Michael Painter (Dec 04)
- Re: Want to move to all 208V for server racks Lamar Owen (Dec 06)
- Re: Want to move to all 208V for server racks Gary Buhrmaster (Dec 04)
- Re: Want to move to all 208V for server racks Seth Mattinen (Dec 02)
- Re: Want to move to all 208V for server racks Gary Buhrmaster (Dec 03)