From owner-freebsd-hackers@FreeBSD.ORG Mon Dec 29 14:03:11 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 7C65016A4CE for ; Mon, 29 Dec 2003 14:03:11 -0800 (PST) Received: from schlepper.zs64.net (schlepper.zs64.net [212.12.50.230]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1F63E43D2F for ; Mon, 29 Dec 2003 14:03:09 -0800 (PST) (envelope-from cracauer@schlepper.zs64.net) Received: from schlepper.zs64.net (schlepper [212.12.50.230]) by schlepper.zs64.net (8.12.10/8.11.1) with ESMTP id hBTM2tEi087252; Mon, 29 Dec 2003 23:02:55 +0100 (CET) (envelope-from cracauer@schlepper.zs64.net) Received: (from cracauer@localhost) by schlepper.zs64.net (8.12.10/8.12.9/Submit) id hBTM2thZ087251; Mon, 29 Dec 2003 17:02:55 -0500 (EST) Date: Mon, 29 Dec 2003 17:02:55 -0500 From: Martin Cracauer To: Tim Kientzle Message-ID: <20031229170255.A87023@cons.org> References: <20031225224609.A5326@cons.org> <3FEF2D62.8010906@acm.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <3FEF2D62.8010906@acm.org>; from kientzle@acm.org on Sun, Dec 28, 2003 at 11:22:10AM -0800 cc: freebsd-hackers@freebsd.org cc: Martin Cracauer 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: Mon, 29 Dec 2003 22:03:11 -0000 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.