nanog mailing list archives
RE: rack power question
From: Mike Tancsa <mike () sentex net>
Date: Sun, 23 Mar 2008 13:36:16 -0400
At 01:14 PM 3/23/2008, Ray Burkholder wrote:
My desktop has a 680 Watt power supply, but according to a meter I once connected, it is only running at 350 to 400 Watts. So if a server has a 980W power supply, does the rack power need to be designed to handle multiples of such a beast, even though the server may not come close (because it may not be fully loaded with drives or whatever)? Wouldn't it be better to do actual measurements to see the real draw might be?
The startup draw can be quite a bit more. I think before all those fancy power saving features kick in, some of the servers we have can draw quite a bit on initial bootup as they spin the fans 100% and spin up disks etc. I also find the efficiencies of boards really vary. In our spam scanning cluster we used some "low end" RS480 boards by ECS (AMD Socket 939). Cool to run to the point where on the bench you would touch the various heat sinks and wonder if it was powered up. This compared to some of our Tyan 939 "server boards" which could blister your finger if you touched the heat sink too long.
---Mike
Current thread:
- Re: rack power question, (continued)
- Re: rack power question Lamar Owen (Mar 24)
- RE: rack power question John Lee (Mar 22)
- Re: rack power question Justin M. Streiner (Mar 23)
- Re: rack power question david raistrick (Mar 23)
- Re: rack power question Leo Bicknell (Mar 23)
- Re: rack power question Petri Helenius (Mar 23)
- RE: rack power question Ray Burkholder (Mar 23)
- RE: rack power question Jon Lewis (Mar 23)
- RE: rack power question John Curran (Mar 23)
- Re: rack power question Paul Vixie (Mar 23)
- RE: rack power question Mike Tancsa (Mar 23)
- Re: rack power question Petri Helenius (Mar 23)
- Re: rack power question Lamar Owen (Mar 24)