(CPU) Fans are working strange after BOINC was in use

Questions and Answers : Windows : (CPU) Fans are working strange after BOINC was in use
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Message 1878569 - Posted: 16 Jul 2017, 18:12:07 UTC
Last modified: 16 Jul 2017, 18:33:10 UTC

Hi all,
hopefully using the right forum, I have a question about strange fan activities right after coming back from using Boinc/seti.
Running seti for about 15 years, this is the first time having this behaviour on a machine. This is about a Fujitsu Celsius R920 with 2x Xeon E5-2690 and 2x GTX: a 1060 driving the monitor, and a 1080.

Now when coming back to work stopping Boinc, the 2 CPU fans (I think they are, it seems not to be the 2 graphics card fans) start to go to 100% and stops it immediately after reaching, until both fans stopped rotating, to start the 100% again. I can see this 100% - 0% very well on a monitor like CPUID's HWMonitor, but it could'nt say exactly wich fans are working. They are a little bit one after another in time, so they make really annoying sounds, a bit like howling wolfes.

Since this up and down is about every 10 seconds, it nibbles at my nerves. I don't want to restart the machine every time Boinc was doing what it is made for, and I can't stand howling fans any more. Probably somebody has an idea why this happens with Fujitsu machine, while HP Z800 was ok all the time, or better, how to stop that.

Thanks alot in advance!
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Message 1878570 - Posted: 16 Jul 2017, 18:18:51 UTC

The first question is how old is the machine and how long has it been running Boinc.

If it not new then has the dust been removed from the inside.

I had a similar problem which proved to be a dust clogged CPU heat-sink
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Message 1878574 - Posted: 16 Jul 2017, 18:32:12 UTC

Hi Bernie,

I don't know the exact age of the machine since I bought it used some weeks ago. Used and cleaned, including the heat sinks. I opened it up some times to mount graphic cards and different stuff like HDDs, last time yesterday.
Since then it is running seti also. Not every day, but often. I am 3D artist and the machine often is in 100% useage - either CPUs or GPUs, depending on work. For that, I use many different programs.
None of them triggers this 100% - 0% usage of the fans. Seti is the only one wich does.
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Message 1878576 - Posted: 16 Jul 2017, 18:52:08 UTC

While graphic arts may appear to be very intensive users of the CPU & GPU in reality they are quite tame in comparison to the load imposed by SETI@Home (and most other BOINC based computational work).
Bob Smith
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Message 1878578 - Posted: 16 Jul 2017, 19:02:02 UTC - in response to Message 1878576.  

Hi Bob,

thanks for your answer. I belive that seti is heavily using CPU and GPU. For the 3D graphics, I can only say what the monitores show. And if rendering, they do show also a 100% usage, over days, both kinds of xPUs.
However, I don't see how that helps, even if they wouldn't do. The sinks are clean and seti is still the only program wich triggers this fan behaviour after stopping its work, and this is the first machine doing so. So far, who knows what comes ^^
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Message 1880599 - Posted: 27 Jul 2017, 16:51:10 UTC

So, after looking it up a while I think it is about the cooling-strategy Fujitsu is driving here. The CPU's have cooling fins on it and then the fans have to cool the CPU via the fins. By the way this also happens with heavy load of rendering. I didn't had the new machine very often in the renderfarm, instead some of the older ones which seams to have better cooling fans and stuff for the xeons in there. So it is no dust but a general cooling issue in this machine.

It would be nice if someone could tell me how to completely take the CPUs out from calulating SETI. I see the parameters but the effects are not very clear to me. Either they aren't divided into CPU and GPU or I do not understand them well. Thanks!
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Message 1880603 - Posted: 27 Jul 2017, 17:08:53 UTC

It is very simple to stop SETI from getting CPU work - in the options accessed from your account web page you will find a check box for "use CPU", this is ticked by default, uncheck it, and wait a few hours to fully take effect.
Bob Smith
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Message 1881514 - Posted: 1 Aug 2017, 8:41:13 UTC

Thanks alot!
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Questions and Answers : Windows : (CPU) Fans are working strange after BOINC was in use


 
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