From owner-freebsd-questions@FreeBSD.ORG Tue Oct 15 11:57:26 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 8785FA68 for ; Tue, 15 Oct 2013 11:57:26 +0000 (UTC) (envelope-from ralf.mardorf@alice-dsl.net) Received: from mail51c50.megamailservers.eu (mail51c50.megamailservers.eu [91.136.10.61]) by mx1.freebsd.org (Postfix) with ESMTP id EF69B2A61 for ; Tue, 15 Oct 2013 11:57:25 +0000 (UTC) X-Authenticated-User: ralf.mardorf.alice-dsl.net Received: from [85.182.20.69] (e182020069.adsl.alicedsl.de [85.182.20.69]) (authenticated bits=0) by mail51c50.megamailservers.eu (8.13.6/8.13.1) with ESMTP id r9FBVJwC018796 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 15 Oct 2013 11:31:23 +0000 Message-ID: <1381836678.757.38.camel@archlinux> Subject: Re: UPS buying suggestion From: Ralf Mardorf To: freebsd-questions@freebsd.org Date: Tue, 15 Oct 2013 13:31:18 +0200 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-CSC: 0 X-CHA: v=2.0 cv=cL1XRCiN c=1 sm=1 a=ztyVO8lz3lMybfiksaaZaw==:17 a=ALKwz0t7uJUA:10 a=IkcTkHD0fZMA:10 a=rsIYsMhsAAAA:8 a=8-3U5OmvWyEA:10 a=brmyBxHTfoloF1a1328A:9 a=QEXdDO2ut3YA:10 a=ztyVO8lz3lMybfiksaaZaw==:117 X-CTCH-RefID: str=0001.0A020207.525D278B.0152, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Oct 2013 11:57:26 -0000 On Tue, 2013-10-15 at 15:07 +1000, yudi v wrote: > Also, how to measure exact power consumption by a device? Most of us can't do it. We can do a guess by taking care of the computer gears specifications, plus doing a very inaccurate, raw measurement using an elCheapo power coasts meter. Note, the measurement accuracy given by the specifications of those elCheapo power coasts meters are completely wrong, those devices are far away of being that precise, they are absolutely unusable even for raw consumption measurements, but they might indicate, if there should be a computer device that does consume much less or more than it should regarding to it's specifications.