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Old 25th December 2010
BSDfan666 BSDfan666 is offline
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Is this an x86 machine? if so, most OS's will scale the CPU clock rate, lowering the temperature.

On OpenBSD, you can do this manually setting the hw.setperf sysctl(1), or by configuring apmd(8) in /etc/rc.conf.local.

There was once a diff floating around the mailing lists to do automatic scaling in the kernel, but I'm not sure if it was committed.
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