Noctua NA-FC1, 4-Pin PWM Fan Controller

clone · 2 Apr 2022 at 09:48

Can i use this too turn down a ddc pump as its to fast and causing bubbles in the loop.
Thanks.

LuckyBenski · 2 Apr 2022 at 13:28

Is the DDC pumps 4 pin/PWM controllable? If so yes, if not, no sadly.

clone · 2 Apr 2022 at 13:46

Yes it's a four pin just wanted to make it would work thanks.

Wing-Man · 2 Apr 2022 at 19:15

99.9% of the world use a fan header. works very well even if the pump isn't PWM

Wing-Man · 2 Apr 2022 at 19:17

WOW the Noctua NA-FC1 is £20 and controls one fan. you must be mad.
use a Fan header or a 7V fan cable

clone · 2 Apr 2022 at 19:17

I am leak testing my loop and the pump is causing bubbles so I need somit to turn down the pump as I've got the flt 80.
It controls more than one fan.

Wing-Man · 2 Apr 2022 at 19:21

clone said:
I am leak testing my loop and the pump is causing bubbles so I need somit to turn down the pump as I've got the flt 80.
It controls more than one fan.

remeber the Wattage of the PUMP, the controller will have a max output normally around 15w for most controllers

What model of pump do you have and what other fans will you want to run off it

clone · 2 Apr 2022 at 19:28

Laing DDC pump 12V 18W DDC 3:25 no fans will be running on this it's just for the pump.

Wing-Man · 2 Apr 2022 at 19:32

just check the speck on the controller, but if you running under max output you should be fine

LuckyBenski · 2 Apr 2022 at 19:46

Wing-Man said:
99.9% of the world use a fan header. works very well even if the pump isn't PWM

How does it adjust speed if the pump isn't PWM though?

Wing-Man · 2 Apr 2022 at 19:47

LuckyBenski said:
How does it adjust speed if the pump isn't PWM though?

voltage.... (DC)

LuckyBenski · 2 Apr 2022 at 20:08

Wing-Man said:
voltage.... (DC)

Not if the motherboard doesn't support voltage control... I'm just pointing out that 99.9% of users is not that accurate

Wing-Man · 2 Apr 2022 at 20:36

LuckyBenski said:
Not if the motherboard doesn't support voltage control... I'm just pointing out that 99.9% of users is not that accurate

show me the ones that don’t, you would be surprised how many board say pwm but just use voltage.

LuckyBenski · 2 Apr 2022 at 22:50

Wing-Man said:
show me the ones that don’t, you would be surprised how many board say pwm but just use voltage.

Well I mean, 3 out of the 4 boards I have? Asus H61M, H81M...

Wing-Man · 3 Apr 2022 at 07:36

LuckyBenski said:
Well I mean, 3 out of the 4 boards I have? Asus H61M, H81M...

Proves my point perfectly, with 10 seconds of googling "asus h61m uses DC over PWM control"
Just because it had 4 pins doesn't make it PWM, it says OXO on bus's but they don't sell it

LePhuronn · 4 Apr 2022 at 13:43

I'm doing the exact same thing when I (eventually) tube up and just grabbed this controller off the MM.

The controller comes with 2 input cables: one that is a simple 4-pin extension for connecting to the motherboard, the other is a split input with a motherboard connector without the 12V wire and a separate SATA connector to power direct from the PSU so you can drive lots of fans or high power fans that would normally overload the fan header.

You'll need to use this split input if you're going to control the DDC for bleeding because the controller itself, obviously, needs to be powered. So if your DDC pump has separate Molex/SATA for power and PWM cable, obviously hook the DDC into the PSU. If your DDC only has the single 4-pin cable, the PSU power coming into the controller will be plenty to drive the pump as well.

Note however this fan controller is a PWM generator, it's not a variable resistor. So if your DDC is actually voltage controlled, the fan controller will not work as it's always outputting unmodified 12V power.