MSI Z97 MPOWER MAX AC - Fans do not change their speed

[graysky]

Just build an i7-4790K system with this board and have my NH-D14 two fans connected to the two CPU fan pins on the MB. I cannot get the smart fan feature in the BIOS to work with either of them; they only run at full throttle despite my adjusting the temp/RPM points. Has anyone with this board or a similar board gotten this feature to work? I should say that I know the fans are capable of running at other speeds because this is the same HSF I used in a different rig where they did work as expected.

Thanks!

 

[Burpo]

The board has 5 fan headers..
"The fan controls in the BIOS are also upgraded, giving users a proper graphical control of the power vs. temperature graphs at each of the gradient points. There is still a small jump for MSI to move from power vs. temperature to RPM vs. temperature with proper fan testing"
http://www.anandtech.com/show/7966/msi-z97-mpower-max-ac-review-overclocking-air-water-heatsink-260

Either the fans are not connected properly, or you aren't adjusting BIOS settings correctly..

Take a look here..
"The only real data missing here is voltages and fan speeds, which MSI has moved to a different part of the BIOS. "
http://www.anandtech.com/show/7966/...-review-overclocking-air-water-heatsink-260/2

 

[graysky]

That is more or less how mine is setup. I have the green and blue point at the lowest 12.5 % setting. Blue is set to 50 C yet despite an idle temp of 28-30 C it still runs @ full RPMs. I have the 3pin fan connected correctly to the 4-pin header; there is a fin of plastic that makes it impossible to connect them incorrectly.

 

[Burpo]

Did you read the article?

"It is a common fallacy that fan power is directly proportional to fan RPM. Most fans have a dead-zone <20% power where the fan speed does not change, and above 20% power, more power is more fan speed. ASUS (in BIOS and software), GIGABYTE (in software) and ASRock (in software) are now getting this issue and are implementing the testing routines to do so. Getting them to then adjust the graph to show RPM vs. temperature rather than power vs. temperature is a little harder (it requires some interpolation mathematics which is really easy to do), but this needs to be the next stage in MSI&#8217;s fan control development for sure."

You could add a fan controller or software to adjust speed if the MSI setup isn't satisfactory..

 

[graysky]

I studied the manual closely and it seems that the two CPU fan connectors expect the 4 pins to be:
1) Ground
2) +12V
3) Sense
4) Speed control

The three SYS fan connectors expect the 4 pins to be:
1) Ground
2) Speed control
3) Sense
4) NC

I hooked up my two CPU fans to the SYS headers and they behave as expected.

 

[Burpo]

That works too!