simplyfabio
On the manual, is described that the three bottoms right fan connector, SYS1, SYS2, CHA, are DC/PMW Fans header. For me, it's not clear how to switch between the modes.
I have plugged in PMW fans, but in the bios, I can only change the percentage.
 
Do you have any advice on this?
 
Thank you very much!

You are Missing another setting in the Bios. Image on the way.
 

Only the Smart Fans can be managed.

You don't "switch between the modes". You either have a fans that are controlled with voltage changes or fans that are PWM. 3 wire fans are DC - 4 wire are PWM. You change the fan speed percentage. The board will auto detect what type of fan

Are you plugging in 4 wire fans there?

GGTV-Jon
Are you plugging in 4 wire fans there?

Yes! Is the reason why I am asking. In the manual is shown this, but I cannot find it in the bios the option to change the SYS fan to PMW.

That description (not the BIOS picture) in the manual was more to show that the 2 fan headers for the CPU we're PWM only and the rest were for both voltage controlled and PWM

GGTV-Jon
If BC hasn't gotten you straightened out by the end of the day I will mess with my board when I get home from work tonight

Take over as I cannot find any PWM fans to connect and play with. Thanks

SO,, I learned something about the fan speed settings available in the bios and now bcavnaugh's picture with the yellow boxes in post #2 makes sense
 
So,, lets start fresh
 
As far as the whole DC/PWM as described in items 3 and 4 on page 17 of the PDF - The motherboard will auto detect weather or not you have a 3 wire (DC) voltage controlled fan where the fan speed is controlled by changing the available voltage too it OR an 4 wire (PWM) fan that is controlled by a square wave signal. Fan speed is controlled by a built in controller in the fan that turns on and off the ground in relation to the square waves high low ratio. YOU DO NOT set which one it is
 
Now onto the pictures
 
First picture you can see that I have CPU Fan 1 at max and the "Smart Fan Settings" below it are grayed out. I have my pump's speed control lead hooked to this header.
CPU Fan2 is set to Smart and the "Smart Fan Settings" are lit up. I have a lead running to the PWM radiator fans for fan speed control
Power Fan (VRM Fans) is set to Smart as well
Down at CHA_Fan you can see a fan speed. I have a 3 wire fan plugged in there - no "Smart Fan" settings are available for the System, CHA and IO fan headers. You can set a static fan speed percentage or have it at MAX
 
Edit note: If someone has a PWM fan in one of the System, Chassis, I/O fan headers and does have Smart Fan as an option please correct me
 

 
Second Picture
You can see the fan curve is set to be controlled by the CPU temperature and the speed stepping

 
3rd picture in next post

simplyfabio

GGTV-Jon
Are you plugging in 4 wire fans there?

Yes! Is the reason why I am asking. In the manual is shown this, but I cannot find it in the bios the option to change the SYS fan to PMW.

What Bios are your Running?
That is a really Old Bois, that photo is from the Manual.

bcavnaugh
It though tying to answer questions from an out dated manual, it is not easy feat.
With 1.08 the manual really should have been updated not only of the Bios Images but also the new added features.
This needs to be done even on the X299 MB with the first release and then the second release with the active VRM Cooling.  

The manual team is probably overloaded trying to get stuff done for the new Z390 stuff...

simplyfabio
Thank you guys!
For me was only strange that only the two CPU fan are "Smart" in a board like this, so I thought was my fault or not attention to some BIOS detail.
So, I need to plug my dual radiator with 4 fans in CPU2 to have the Smart enabled for them as well.
Thank you guys!

I use a slitter that has the fan power from the PSU and just the Tach and PWM to the CPU 2 to power the radiator fans - https://www.ekwb.com/shop...ter-4-fan-pwm-extended

simplyfabio

GGTV-Jon
 
I use a slitter that has the fan power from the PSU and just the Tach and PWM to the CPU 2 to power the radiator fans - https://www.ekwb.com/shop...ter-4-fan-pwm-extended

Thank you! Do you think that I can manage it using 3 NOCTUA Y SPLITTER as well, without the molex? Each of my fans is rated 0.16A, should be ok, isn't it?

This is off the bottom of page 7 in the PDF

ALL FAN HEADERS HAVE A MAXIMUM POWER LIMIT OF 2 AMP @ 12 VOLTS (24 WATTS). EXCEEDING THIS LIMIT WILL CAUSE IRREPARABLE DAMAGE TO THE BOARD.

 
I had bought the splitters because if and when I get things put into the case ther will be over 10 fans and I felt this to be the best way to not overtax the board