Posts by nedsram

Info	Message
1) Message boards : Questions and problems : is BOINC damaging my PC? Message 41183 Posted 16 Nov 2011 by nedsram	Again many thanks for the replies. I will try some of the more advanced suggestions for cleaning it out at some point, starting with the brush technique. However I can now report that it is reporting trickles about four times faster than it did before I cleaned it out - and I no longer get over temperature errors when I reboot. So at least I'm part of the way there. I hadn't realised that the circuitry throttles down the speed when it reaches the maximum permitted operating temperature, but clearly it does so rather dramatically! As they say a bit older and a bit wiser.
2) Message boards : Questions and problems : is BOINC damaging my PC? Message 41123 Posted 12 Nov 2011 by nedsram	Well after it tripped again I finally put the vacuum cleaner to it. It was a bit of a mess inside, and I cleaned out all the fans and grilles as well. Before I cleaned it out, all cores were running at 100 with CPDN running. Snoozing CPDN didn't make much difference to the temperature - down to 95 at the lowest. (I've since read that once the temperature hits 100, circuitry slows down the CPU, which could well explain why my average credit had been dropping.) After a good cleanout, it's now varying between 94 and 100 with CPDN running, but the temperature drops to 60 within 30 seconds if I snooze it. So... Yes it was a mess, and I should have cleaned it out regularly. And CPDN does indeed seem to hammer the CPUs. I'll monitor the situation to see if the RAC increases, and whether I still get any over temperature errors on reboot.
3) Message boards : Questions and problems : is BOINC damaging my PC? Message 40988 Posted 5 Nov 2011 by nedsram	Thanks for the replies. It seems that 100C is excessive then. I'll try reducing the amount of CPU it's allowed to use and see if that helps. If it cuts out again I'll take the cover off and give it a good clean out. (It's a tower and was purchased from a well regarded supplier BTW.)
4) Message boards : Questions and problems : is BOINC damaging my PC? Message 40955 Posted 4 Nov 2011 by nedsram	About 18 months ago I bought a shiny new i7 8-core PC and immediately installed BOINC to run 8 CPDN tasks. All was well until a few months ago, when on reboot I started getting BIOS "CPU over temperature" errors. I ignored these, but I did notice that my average credit for the PC was steadily dropping. Last week, for the first time, the PC powered off without warning. It rebooted OK (plus over temperature error), but this has now happened 3 more times. Some Googling suggested that if the CPU temperature exceeded some value the PC would automatically power off. I've just installed RealTemp, and it shows all four cores running at 100C. If I snooze BOINC the temperature drops to around 97C after a minute or so. Could somebody please advise whether the problem is running BOINC, or whether it might just be something more mundane such as the PC getting clogged up with dust, reducing the efficiency of the fan. And does anybody know what temperature these cores should run at when BOINC is running (i.e. 100% CPU all the time)? Many thanks.
5) Message boards : Questions and problems : Moving WUs to a different PC Message 20462 Posted 24 Sep 2008 by nedsram	You can only do this when you move the complete BOINC directory (or Data directory in case of BOINC 6) with all sub-directories to the new PC, while the new PC must be using the same operating system platform and have the same CPU manufacturer as the old PC had. So... Can do: Windows 2000 -> Windows XP Intel P4 -> Intel Core2 Can't do: Windows XP -> Linux Intel -> AMD It also depends on which projects you are attached to, if they are updated enough to allow the above. In any case, all your work is registered to the PC that downloaded it, that same PC should upload it. The PC is registered at the project under the hostID. When you change CPU or OS, you will get a brand new hostID, to which all that work isn't registered, so it won't upload/report it to that one. Lost time and work. If the OSes and CPUs don't match your best bet is to run out your cache on the present PC and if that's not possible, to abort all the work you have in progress and start anew on the other system. After you moved the directory, you should of course install BOINC on the new system, pointing to the directory you just moved to install BOINC in. Thanks. The problem is that the old PC will be "recycled" for another user, and BOINC will certainly be removed at this time. So I can't wait until they've finished then upload them. So I guess the WUs might as well be aborted when the PC goes away.

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