"Fan" said:
Today, I replaced my HP d330 motherboard for a new Asus P4RD1-MX. The
transplantation went OK, but now my fans are operating at full speed
and they are producing a lot of noise. This happens from the moment
that I start the computer. The temperature of the CPU is not the
problem I think.
I tried using speedfan for lowering the speed, but I was not able in
changing the speed of the fans.
Could the 20 pin power cable of my PSU be a problem? The new
motherboard has a 24 pin connector.
Can anyone give me a clue for a solution for this problem?
TIA
As I understand it, companies like HP, when they have an OEM
motherboard designed, tend to put more fan control channels
on the board. Asus is not usually as generous on their retail
boards.
Asus retail boards have 0, 1, or 2 fan control channels on
their boards. "Q-fan2" is the feature name that tells you
the CPU fan speed and the CHASSIS fan speed can be controlled.
"Q-fan" is the feature name that tells you the CPU fan speed
can be controlled only. Some boards have no fan control
channels at all. Usually, you can monitor the speed of
the fans plugged to the motherboard headers, so that part
should work for you. (I.e. You can monitor all the RPMs,
but are limited to which fans you can control.)
In the picture of the P4RD1-MX motherboard, I can see a
MOSFET next to the CPU fan header. You might experiment with
SpeedFan and see if the CPU fan can be changed. I don't think
SpeedFan has any way to tell whether a MOSFET is present
near a fan header or not. SpeedFan may think it is changing
the speed (because it changed the register contents of the
Hardware Monitor chip), but if the transistor is missing,
nothing happens.
Intel retail CPU fans sometimes have a thermistor mounted
inside the fan. That adjusts the fan speed, as the computer
case air temperature changes. The fan speed will ramp between
temperatures of 30C and 38C or so. Above 38C case air temp,
the Intel fan should run at full speed. If Q-fan was present,
or you could get SpeedFan to work, this would further modify
the fan speed. Unfortunately, I don't see Q-fan listed in
your users manual (even though it looks like there is a
transistor next to the CPU fan header). So SpeedFan is
your only hope.
This has nothing to do with the ATX power connector type.
The problem would exist whether you used a 20 pin or a
24 pin power connector.
HTH,
Paul
