----- Original Message ----- From: "Derek Jennings" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Saturday, August 27, 2005 6:55 AM Subject: Re: [newbie] CPU Temperature
> SNIP > > > > Checking cpu temp in bios is absolutely the worst indicator. > > The system is under very little load. lm_sensors while the OS an > > software are up an running is the only way to check for extreme > > temps under high load. As, for example, with (torture test) > > ftp://mersenne.org/gimps/mprime2413.tar.gz > > I disagree. The temperature read out of lm_sensors has to be set up for each > motherboard. The readings from an install of lm_sensors is often wildly > inaccurate. The mobo manufacturer will have set up the BIOS temp readings to > be accurate (if they have done their job properly) When configuring > lm_sensors the readout should be compared to the BIOS and a temperature probe > if available. > > SNIP > > > > > Going back to what I've said above **, software attempts at > > cpu cooling are a very bad strategy. When the system is under high > > to 100% load they have no effect, as no HLTS are being sent to the > > processor. When the system is under light load, HLTS are sent > > directly, an the cpu cools rapidly to an artificially low core temp. > > This increases the range of the heat/cool cycle that can cause cpu > > core trace migration, an can result in permanent damage. Also the > > chipset is not being artificially cooled, an motherboard damage is > > more likely. This is why, using athcool as an example, the author > > issues this disclaimer : > > True, both Athcool and speedstepping will cause the CPU temperature to vary, > but that is better than having the OPs computer shut itself down after 30 > mins. > I note also that Athcool's author does not list "Core trace migration" as a > risk when using athcool. > > > > Before use athcool, you must recognize these potential DANGERS. > > Please use athcool AT YOUR OWN RISK. > > > Athcool does not work on all mobos and versions of Athlon. I have an old > Athlon T-Bird where it makes the system unstable. > > Most recent Athlon mobos should work fine. After all athcool is simply using > the feature AMD put into the Athlon for the purpose of reducing power > consumption. Are you saying AMD do not know about CPUs ? > > Where I do agree with you is for the need of the CPU heatsink and case cooling > to be adequate for the heat produced at full load. > > derek > > -- > www.jennings.homelinux.net > http://twiki.mdklinuxfaq.org > > First of all, sorry for the late reply. I've been extremely busy. Many thanks for all your suggestions. I've tried to cool the case down by pointing a fan directly into it. This made Mandriva last about 45 mins instead of 30 mins before telling me the temperature was too high. Is Mandriva using the CPU a lot more than Windows? As I said in my original post, Windows doesnt seem to go over 56 degrees and it's been running 24/7 for weeks at a time. Mandriva runs for between 30 and 45 mins and the temperature skyrockets. I'm too poor to upgrade my system at the moment. Guess I'm gonna be stuck with Windows for a while :(:(:( I really want to start learning Mandriva Linux. I've tried Fedora Core 4. But I didn't like it all that much. Mandriva seems to be the best I can find. Many thanks for your help. Al
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