From owner-freebsd-hackers@FreeBSD.ORG Tue Dec 30 00:59:44 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 57A0016A4CE for ; Tue, 30 Dec 2003 00:59:44 -0800 (PST) Received: from mailbox.wingercom.dk (mailbox.wingercom.dk [81.19.240.4]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9790843D41 for ; Tue, 30 Dec 2003 00:59:42 -0800 (PST) (envelope-from per@xterm.dk) Received: from mailbox.wingercom.dk (localhost [127.0.0.1]) by mailbox.wingercom.dk (Postfix) with SMTP id 869ED9319E; Tue, 30 Dec 2003 10:03:47 +0100 (CET) Received: from 62.242.151.142 (SquirrelMail authenticated user per) by mailbox.wingercom.dk with HTTP; Tue, 30 Dec 2003 10:03:47 +0100 (CET) Message-ID: <33681.62.242.151.142.1072775027.squirrel@mailbox.wingercom.dk> Date: Tue, 30 Dec 2003 10:03:47 +0100 (CET) From: "Per Engelbrecht" To: In-Reply-To: <20031229170255.A87023@cons.org> References: <20031229170255.A87023@cons.org> X-Mailer: SquirrelMail (version 1.2.5) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit cc: freebsd-hackers@freebsd.org Subject: Re: Power consumption in desktop computers X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Dec 2003 08:59:44 -0000 Hi Martin and the rest of you Due to a regulation on watt pr. squaremeter (=heat) in the datacenter we use (InterXion) we have spent a lot of time finding new boards, cpu, psu, ram et al for the servers we use for dedicated serverhosting. All items are measured with different kinds of 'Fluke' volt-meters and on differnt places. Don't know if you folks can use it, buthere goes: CPU (Intel P4 2,4) 63Watt CPU (Intel Celeron 2,2) 54Watt PSU (150Watt with ~70% allocated to 3,3V and 5V) +20-30% on power-on! RAM (Kingston pc2700 512MB) 2,5Watt BOARD (ASUS and DFI onboard LAN, 32MB video, sound) 25Watt DISK (IBM and Seagate ATA133, 40GB) 12Watt CDrom none A complete "server" has a total of: Wake-on-LAN 8watt Idel 42-54watt Max load 92-109watt Beware of the ekstra powerconsumption on power-on! You can expect an ekstra 20-30% on power-on caused by the various circuits on the board, but not least in the PSU. This is only a feature if you work with 16amp feeds (or any other power-feed) and are on the egde of max - then you have to take the ekstra20-30% in account so that you can power all servers up at once, if needed. Best regards /per per@xterm.dk > Tim Kientzle wrote on Sun, Dec 28, 2003 at 11:22:10AM -0800: >> >> Ouch! I've tested a bunch of 'business-grade' desktops around >> my office, and they all run 40-60 watts during normal use (not >> including monitor) with peak power at boot time up to 70-80 >> watts. This includes some P4s with lots of memory, CD-RWs, etc. >> (The one exception is an AMD Duron system; it seems that >> the AMD processors are uniformly power-hungry.) > > I wonder how that works. > > I finally got ahold of a datasheet of P-4 power consumption: > http://support.intel.com/support/processors/pentium4/sb/CS-007999.htm#Table2> > The least hungry P-4 takes 48.9 watts (1.30 GHz), the current > 3.20 and 3.06 GHz models take 82 watts. > > Add the mainboard and the efficiency loss in the power supply. > > Are these business-grade ones maybe equipped with mobile P-4s? > > Martin > -- > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > Martin Cracauer > http://www.cons.org/cracauer/ > No warranty. This email is probably produced by one of my cats > stepping on the keys. No, I don't have an infinite number of > cats. > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to > "freebsd-hackers-unsubscribe@freebsd.org"