D5 pump control

slyverine · Sep 22, 2016

Hello there. I have a custom loop water cooled pc, my specs are at my signature. Yesterday, a friend of mine who is building my pc came and we added water cooling to my motherboard and changed my pump to a EK-D5 PWM G2 Motor (12V DC PWM Pump Motor) .

On my RIG i have 4 fans. The fans you need to know more are the 2 fans that cool one double radiator , that they are connected to cpu and cpu opt header(the fans are not PWM). The water pump is connected to the header above , which according to manual is water pump header.

My problem is that i can't control the speed of the pump from AI suites fan expert! I pressed tune, it found the characteristics of fans but when i change water pump speed, it just doesn't change the speed.

What i can try?

n0ns3ns3 · Sep 22, 2016

1. the headers can control both PWM and non PWM devices. make sure you select PWM mode for the pump.
2. there is no practical difference in cooling with pump speed over 30%. (that's why IMHO D5 Vario is the best, set on 2 and forget)

slyverine · Sep 22, 2016

my friend told me i should connect my pump to cpu header because it doesn't detect a pulse signal on it and so it doesn't detect to the others as well (pump and cpu_opt). Is it true?

n0ns3ns3 · Sep 22, 2016

I'm not sure I understand the question.
you do want to connect the pump to PWM capable header - otherwise you can not control the pump.

slyverine · Sep 22, 2016

I just transfered his words

From what i understood he wanted to say that if the motherboard doesn't detect a PWM signal on cpu fan ( a non PWM capable fan is connected atm at cpu fan) , it just thinks there is no PWM signal and thus, i can't control my water pump for that reason.

n0ns3ns3 · Sep 22, 2016

well .... each header can be set to control either PWM or non PMW device

slyverine · Sep 22, 2016

anyway, i will go check it more when i get back home, i just had like 20m on my pc. Thanks for the help!

rubix_1011 · Sep 22, 2016

I'd recommend not using PWM on a pump, especially a D5. There is not a benefit to constant variation of pump RPM based on instantaneous temperature readings.

Water temps change much, much, much more gradually.

slyverine · Sep 29, 2016

Guess you are right, but, the way my setup was i couldn't change anything to pump speed it was working on 100%.
I fixed my problem, i plugged my pump to cpu fan header and the 2 radiator fans one to cpu opt and one to where the pump is supposed to go. I can now control my pump speed! Iam working my pump to 60% and it slighty makes a "wave" at the top of the reservoir, i have it half full i want to watch the water.

Iam gonna remove one fan though from cpu opt and connect it to the other header with the other one with a y splitter because the fan is working with the pump speed and i can't control it, and i want to make my pc silent when iam not gaming.

n0ns3ns3 · Sep 29, 2016

than you can go to even slower than 60% speed for the pump - a bit less vibration -> a bit more quite

slyverine · Oct 3, 2016

Maybe, but i have installed both input and output on the bottom of the reservoir, will the water recycle correctly if not the input is pushed to the top?Picture provided

https://scontent.fath3-2.fna.fbcdn.net/v/t1.0-9/14484837_10210121338206734_61496755351332988_n.jpg?oh=c76e8e87017db8f662c22458ca1baae9&oe=58AAF41B

n0ns3ns3 · Oct 3, 2016

there is no major problem with this setup. Especially if you have small tube for the inlet inside the reservoir to avoid recycling air.

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