The W_PUMP header is the same as the cpu fan header 1amp - 12w.
You can let the kelvin cooler connected to the W_PUMP it says it draws 0.27 amps. A low grinding noise doesn't sound good, you might want to ask fractal tech support about that.
You should be able to control the pump by voltage control in the bios, you can ask them when they reply to your support ticket.
Setting connected devices by voltage or wattage would be convoluted at best. The speeds are set by RPM/percentage values. A pump that draws a maximum of 0.27A is not much of a pump. It would be best to run it at full speed at all times.
arctic liquid freezer ii 420 rgb
Motherboard ASUS ROG MAXIMUS Z790 HERO
Intel Core i9 13900k processor
actually i am also facing this dilemma right now.
asus recommend for liquid cooling the use of the correct headers aio_pump or w_pump
aio pump is the same as cpu fan with the difference that the cpu fan is still controllable, the two liquid cooling headers run at 100% full speed PWM
w_pump+ is 36W 3A full speed pwm
All others are 1A 12w and only aio_pump is at full speed
According to asus, the use of cpu fan header is not recommended, but realistically, if it is not w_pump, everything else is the same in terms of amps and voltage, even aio_pump is not controllable
It's really confusing what is the right thing to use.
Artic recommend using a cpu fan header because long term use at full speed pwm is not good for the pump
And what are we doing ?