Date: Mon, 21 Jul 2008 22:05:00 +0300 From: Achilleas Mantzios <achill@matrix.gatewaynet.com> To: Manolis Kiagias <sonic2000gr@gmail.com>, achill@matrix.gatewaynet.com Cc: freebsd-questions@freebsd.org, iwrTech@iwr.ru.ac.za Subject: Re: Monitoring CPU temperature: mbmon shows 201 degrees C Message-ID: <200807212205.02066.achill@matrix.gatewaynet.com> In-Reply-To: <4884A8A7.3070108@gmail.com> References: <48849FFD.10285.C71CED5@iwrtech.iwr.ru.ac.za> <200807211656.10874.achill@matrix.gatewaynet.com> <4884A8A7.3070108@gmail.com>
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Στις Monday 21 July 2008 18:17:59 ο/η Manolis Kiagias έγραψε: > Achilleas Mantzios wrote: > >> My office goes to 38C in summer, and all 5 computers just keep on > >> going, using the principles above. I fitted a fan to the UPS as well > >> (-: > >> > >> > >> > > My box has 3 fans, one on the case blowing from outside=>inside, > > one in the power supply and one on the CPU. > > > > In the evening, i will have the case/board inside blown/cleaned with air, > > i am gonna close the case, and i am gonna tune BIOS to fail-safe settings. > > > > Apart from that, i would like to have a reliable tool to monitor temperature. > > Is there anything in mind? > > > > As you already noticed, mbmon is no good in recent hardware. It works > successfully in my 865-based systems though. > As others have said, I would recommend adding a rear out-take fan. Do > not rely on the PSU's fan to take all the warm air out. The PSU > generates heat on its own, and the fan may not be sufficient. A rear > out-take fan should be located rather high - at CPU height - since warm > air always goes up. This is where most cases have a place for the fan > anyway. It is indeed as you say. The fans on my case are: the PSU fan, one takeout fan just below the PSU and the CPU fan. It is a medium tower size case. The thing is on the bottom PCI slot i have installed a Kodicom 4400 for video capture for use with zoneminder, (the FreeBSD port is available from the zoneminder site) and right above that a LML video capture card. and then while capturing 5 full frame-rate (25fps) cameras in zoneminder a) the load never falls below 0.4 even while no users use it (it is our family workstation as well:) b) all the heat from the kodicom flows higher to the CPU/memory area of the case Having said that, the issue with the temperature must not be my thing :( after kldload coretemp, i get [achix@panix ~]% sysctl -a | grep tempera hw.acpi.thermal.tz0.temperature: 40,0C dev.cpu.0.temperature: -1 [achix@panix ~]% The first always is stuck to 40 and dev.cpu.0.temperature to -1. > > A note for monitoring: If you are using FreeBSD 7.0 and you have an > Intel Core CPU, there is a new coretemp(4) driver that can actually read > the on-die digital thermal sensor. Have a look at man coretemp > -- Achilleas Mantzios
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