nanog mailing list archives
Re: Want to move to all 208V for server racks
From: Matthew Petach <mpetach () netflight com>
Date: Fri, 3 Dec 2010 19:25:15 -0800
On Fri, Dec 3, 2010 at 7:18 PM, Joel Jaeggli <joelja () bogus com> wrote:
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. What does that do to customer equipment choices? I've got a quarter acre of 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. The 10,000amp bus for the 12v feed for a row of server racks would be a thing to behold. I don't think anyone but Paul Wall has seriously considered this.
Some day I'd love to meet that guy--he sure has come up with some revolutionary ideas here! (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.) Matt
Current thread:
- Re: Want to move to all 208V for server racks, (continued)
- Re: Want to move to all 208V for server racks Ricky Beam (Dec 02)
- Re: Want to move to all 208V for server racks Jay Ashworth (Dec 02)
- Re: Want to move to all 208V for server racks Chris Adams (Dec 02)
- RE: Want to move to all 208V for server racks John van Oppen (Dec 02)
- RE: Want to move to all 208V for server racks Alex Rubenstein (Dec 02)
- Re: Want to move to all 208V for server racks Matthew Petach (Dec 03)
- Re: Want to move to all 208V for server racks Kevin Stange (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 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)