Date: Mon, 21 Jul 2008 22:44:46 +0300 From: Manolis Kiagias <sonic2000gr@gmail.com> To: Achilleas Mantzios <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: <4884E72E.8060508@gmail.com> In-Reply-To: <200807212205.02066.achill@matrix.gatewaynet.com> References: <48849FFD.10285.C71CED5@iwrtech.iwr.ru.ac.za> <200807211656.10874.achill@matrix.gatewaynet.com> <4884A8A7.3070108@gmail.com> <200807212205.02066.achill@matrix.gatewaynet.com>
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Achilleas Mantzios wrote: >>> >>> >> 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. > This -1 probably means your CPU is not supported. The man page says "Intel Core or newer" CPUs, and as I understand this is specific to Intel and will not work on AMD. It works fine on my core2duo laptop. I don't know if it works with the earlier Intel CoreDuo (not core2duo) Assuming the heat is what is actually causing you the problems, your options are rather limited: Move to a bigger case with options for better ventilation (maybe 12cm fans in front / rear) or use fans with higher CFM ratings (that will also make it more noisy, one more factor to consider). I currently have a machine with a 25cm side fan. Completely noiseless, and always runs cool.
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