On Fri, 09 May 2008 06:08:53 GMT, John Doe <jdoe@usenetlove.invalid>
put finger to keyboard and composed:

>
>Anybody have an Intel DP35DP motherboard with an Intel heatsink/fan?
>Does the fan speed increase much beyond the minimal 1050 rpm? The
>motherboard manual says the BIOS should have options for fan speed
>control but I don't see them. I did a BIOS maintenance boot and
>noticed the QST switch was off. Turned that on but the fan speed
>controls did not up in the BIOS after restarting and Windows did not
>detect any new hardware. So I have a new E6850 CPU with a fan that's
>stuck at 1050 rpm. Ack.

I think this behaviour may be normal.

http://www.intel.com/cd/channel/rese...eng/299984.htm

"Intel has recently developed a new revolutionary motherboard based
fan speed control included with Intel 965 chipset (and newer) based
motherboards called Intel® QuietSystem Technology (Intel® QST). This
new technology uses a PID controller that can measure the rate of
change of the processor temperature, thus predicting when the
processor will reach its maximum temperature. If implemented correctly
by the motherboard manufacturer, the control algorithm will operate
the processor fan at minimum speed under most operating conditions.
Since Intel® QST can predict when the processor will reach its maximum
temperature, it will delay increasing the fan speed until just the
right moment in order to keep the processor from exceeding its maximum
temperature."

- Franc Zabkar
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