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Mark D. Studebaker
0ead31aaf1
I always forget whether to increase or decrease so I figured
it out and wrote it down.
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@685 7894878c-1315-0410-8ee3-d5d059ff63e0
38 lines
984 B
Plaintext
38 lines
984 B
Plaintext
If you aren't getting the expected readings on your fans,
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try the following:
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- Do you get a fan reading in the BIOS or in DOS?
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If not, you may not have a fan with a tachometer output.
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Look and see. Fans with tachometer outputs have THREE wires.
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- Try experimenting with the fan divisor settings:
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Fan Divisor Minimum RPM Maximum RPM
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1 5314 1350000
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2 2657 675000
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4 1328 337500
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8 664 168750
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16 332 84375
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32 166 42187
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64 83 21093
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128 41 10546
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Pick a divisor so that the nominal RPM is about 50%
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above the minimum. This is a good compromise between
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margin and accuracy.
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If you have a 0 RPM reading some or all of the time,
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increase the divisor until you get good readings.
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If you have a nominal reading less than 1.25 times the
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minimum, increase the divisor to give you margin
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so that you will not get spurious alarms.
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If you have a nominal reading more than 3 times the
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minimum, decrease the divisor to provide better
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accuracy.
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