John Doe wrote:
> 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.
>

If the solution is not in the BIOS, then one way to fix it, is to
power the CPU fan from a Molex power connector.

OK, this one looks pretty good (but out of stock). The two drive
connectors, allow daisy chaining, so no power supply connectors
are wasted. The middle connector (fan, male, 3 pin) goes to the CPU fan
(and the PWM pin is not connected and floats). The right hand connector,
with the single yellow wire, goes to the motherboard CPU fan connector - the
yellow wire carries the RPM signal. The RPM signal helps keep the BIOS
happy, as some BIOS freak if no RPM signal is detected.

http://www.svc.com/3pinto4pinad1.html
http://us.st11.yimg.com/us.st.yimg.c...1999_107234983

I'd use a wire assembly like that, so that the CPU fan receives full
12V all the time, no PWM signal (so the fan is told to run 100%).
That is about the best you could do. You may have enough odds and
ends in your junk box, to make a cable like that.

Paul