Welcome to the ROG forums, Jarto.
Navigate to the Monitor menu. Then click the Fan Speed Monitor option. You'll see the CPU Q-Fan Control option. Change it to PWM mode. Then a bunch of options should appear for you to tweak the temperatures and fan speeds.
Jarto wrote:Check that you have everything connected as Swiftech suggests, check the manual or website, in this type of pwm splitters there is one slot that its really important as its the one that reports the rpms to the motherboard, so crosscheck if all is connected correctly specially if this spot is. Else this would make the splitter just be a 12V splitter as the power comes directly from the 4pin molex.
Thanks for your reply Abula.
I'm using the stock fans that comes with the cooler, they are all PWM capable, so is the pump (4 pins connector).
When I try to run the calibration from the fan xpert software, it says that the controllable range is 0.