From owner-freebsd-current Mon Mar 6 14:32:15 2000 Delivered-To: freebsd-current@freebsd.org Received: from alcanet.com.au (mail.alcanet.com.au [203.62.196.10]) by hub.freebsd.org (Postfix) with ESMTP id DBDF937BA4D for ; Mon, 6 Mar 2000 14:32:06 -0800 (PST) (envelope-from jeremyp@gsmx07.alcatel.com.au) Received: by border.alcanet.com.au id <115229>; Tue, 7 Mar 2000 09:32:54 +1100 Content-return: prohibited From: Peter Jeremy Subject: Re: current lockups In-reply-to: ; from me@camtech.net.au on Mon, Mar 06, 2000 at 09:39:11PM +1100 To: thyerm@camtech.net.au Cc: freebsd-current@FreeBSD.ORG Message-Id: <00Mar7.093254est.115229@border.alcanet.com.au> MIME-version: 1.0 X-Mailer: Mutt 1.0i Content-type: text/plain; charset=us-ascii References: <20000305104515.A17749@moe.c705742-a.htfdw1.ct.home.com> Date: Tue, 7 Mar 2000 09:32:53 +1100 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 2000-Mar-06 21:39:11 +1100, Matthew Sean Thyer wrote: >My computer had been stable all winter (with setiathome runnning full >time) but suddenly come the Australian summer it started freezing. And it's been the coldest summer for something like 5 years... > How about these Peltier (sp ?) cooling devices I have heard about ? A Peltier cell is just a semiconductor heat pump. It effectively just reduces the junction-to-heatsink thermal resistance, allowing you (in theory) to use a less efficient heatsink (or have the CPU run cooler with the same heatsink. The downside is they they're relatively inefficient - your power supply will need to supply an extra 3-4A at 12v and you need to dissipate that extra power. Unless you significantly improve the airflow through the case, you'll probably find that the internal temperature rises significantly - further stressing everything except the CPU. Note that the chip that most needs cooling may not be the CPU - the big support chips can also run very hot. Peter To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message