From owner-freebsd-amd64@FreeBSD.ORG Tue Jun 14 16:32:16 2005 Return-Path: X-Original-To: freebsd-amd64@FreeBSD.ORG Delivered-To: freebsd-amd64@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 35EB816A41F for ; Tue, 14 Jun 2005 16:32:16 +0000 (GMT) (envelope-from fcash@ocis.net) Received: from imap.sd73.bc.ca (smtp.sd73.bc.ca [142.24.13.149]) by mx1.FreeBSD.org (Postfix) with ESMTP id D7C9343D55 for ; Tue, 14 Jun 2005 16:32:15 +0000 (GMT) (envelope-from fcash@ocis.net) Received: from localhost (localhost [127.0.0.1]) by localhost.sd73.bc.ca (Postfix) with ESMTP id E151818CCA3 for ; Tue, 14 Jun 2005 09:32:13 -0700 (PDT) Received: from imap.sd73.bc.ca ([127.0.0.1]) by localhost (mailtest.sd73.bc.ca [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 48738-01-28 for ; Tue, 14 Jun 2005 09:32:12 -0700 (PDT) Received: from s9.sbo (s9.sbo [192.168.0.9]) by imap.sd73.bc.ca (Postfix) with ESMTP id 7139918CCA5 for ; Tue, 14 Jun 2005 09:32:12 -0700 (PDT) From: Freddie Cash To: freebsd-amd64@FreeBSD.ORG Date: Tue, 14 Jun 2005 09:32:09 -0700 User-Agent: KMail/1.8 References: <200506141610.j5EGAC8A016264@lurza.secnetix.de> In-Reply-To: <200506141610.j5EGAC8A016264@lurza.secnetix.de> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200506140932.10548.fcash@ocis.net> X-Virus-Scanned: by amavisd-new using ClamAV at sd73.bc.ca Cc: Subject: Re: Athlon64 board with ECC support? X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Jun 2005 16:32:16 -0000 On June 14, 2005 09:10 am, Oliver Fromme wrote: > David O'Brien wrote: > > There is no difference between Athlon64 and Opteron with respect to > > heat, noise and power consumption. There is yes a price difference. > That's interesting. I've seen several Athlon64 and Opteron > systems, and it was my impression that the latter were all > noisier and ran "hotter". But my impression could be wrong. All Athlon64 systems are single-CPU setups. They're also usually in large tower cases with large (quiet) fans, and tonnes of heatsinks. Athlon64 CPUs also support various throttling and power save modes that further reduce the noise / heat. While it is possible to have single-CPU Opteron systems, most are dual-CPU or quad-CPU. Hence, double or quadruple the heat/noise of a single-CPU system. These are also usually server systems with SCSI or SATA drives that are a lot louder than the consumer PATA/SATA drives. Add in that most server are in rackmount cases where you can't put large, quiet fans, and you get some noisy systems. The CPUs themselves are virtually identical for heat/power/noise. It's the rest of the system you have to look at. :) > It's also interesting to note that there are now plenty of > Athlon64-based notebooks, but I haven't seen any Opteron > notebook so far, which lead me to believe that the Athlon64 > has some power-saving features which the Opteron lacks. > Does the Opteron have "PowerNow" or "Cool'n'Quiet"? The latest Opterons do, not sure about older Opterons. But, Opterons are designed for multi-CPU setups. Why would you want to run one in a laptop? -- Freddie Cash fcash@ocis.net