Hello,
i was wondering, if the cpu usage can be regulated. I am asking, because when i run boinc with a project, my cpu usage goes to 100% and stays at this level.
My PC gets louder and this is disturbing me.
Or, are there projects, which don't use the 100% ?
Regards

Use TThrottle:
http://setiathome.berkeley.edu/forum_thread.php?id=68948&postid=1277084#1277084

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- ALF - "Find out what you don't do well ..... then don't do it!" :)

thank you for your answer.
is there something just for the cpu-usage ?

BOINC has got throttling capability right there in the preferences. Seek for "Use at most 100% of CPU time" and reduce it to whatever amount you want. Mind, this will not set the CPU to use that value constantly, but it will run/suspend work on a 10 second basis according to the value you set.

E.g. 80% means BOINC runs applications for 4 seconds, pauses them for 1 second, runs for 4 seconds, pauses them for 1 second.
60% means 2 seconds run, 1 second pause, 2 seconds run, 1 second pause, etc.

If that's not to your liking, then you can use the third party application Threadmaster. This can be set to a value and use that value in a sustained way.

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Excellent, thank you very much. :)