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Loud Pump Motor Solutions?

post #1 of 14
Thread Starter 
I have a EK DCP 4.0, that was installed into my first WC loop just a few days ago.

And the sound of the motor is really annoying, its a small hum. Easily the loudest thing in my case now. My stock cooler wasn't even as loud.

I know for a fact it is not the vibrations that are resonating because I suspended the pump to see if that was the problem, and it wasn't, heard the exact same sound. It is sitting on a gel plate too.

Is there anyway to quiet this pump down, to make it less audible.
Would a fan controller help in this situation? I wouldn't mind buying one, if it will work. As it would be cheaper than buying a pump and reservoir (I have the combo).

Thank you in advance.

EDIT:
This is for anyone having the same issue.
The Fan Controller worked great for me. Significantly reduced the sound of the pump. I can make it silent (which was about 40-50%), but I left it with a very quiet hum (which was about 70%), so I will know whether it is running or not.

Thank you everyone for your help.
Edited by insomnia9669 - 8/23/11 at 8:18pm
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post #2 of 14
You can use the CPU fan header to control the pump speed. Just plug it in directly to the MB and use the MB software to control the speed.
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post #3 of 14
If there is airbubbles in the pump then that could make it noisier.
I use mains pumps for liquid cooling so my knowledge on laing/DD/EK/swiftech et all is pretty weak.
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post #4 of 14
Thread Starter 
Quote:
Originally Posted by theseekeroffun View Post
You can use the CPU fan header to control the pump speed. Just plug it in directly to the MB and use the MB software to control the speed.
Is it safe to use the CPU fan header? The pump has 18W. I honestly am not sure what is safe for it. My Motherboard is a M3A78-T. If anyone can let me know that would be great, thank you.

EDIT: I just checked my manual and each fan header supports 24W. Alright I guess I will give this a try.

Quote:
Originally Posted by MightyMission View Post
If there is airbubbles in the pump then that could make it noisier.
I use mains pumps for liquid cooling so my knowledge on laing/DD/EK/swiftech et all is pretty weak.
I am fairly sure I got all/most the air bubbles out. The sound is very consistent. When I filled the loop, I kept tilting it and turning the pump on and off, until no more bubbles came out.
Edited by insomnia9669 - 7/23/11 at 7:15am
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post #5 of 14
The load current is 1.8A which should not be a problem. However, I don't know your MB.
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post #6 of 14
Even though the start up voltage is supposed to be 8v they'll run at 5v and that really quietens them down albeit with a lot lower flow rate. I also had one connected to a fan controller (Lamptron FC2, 45W per channel) and it also runs fine but you have to be careful setting the speed as if it's too low it won't start. I replaced them with Laing D5s in the end.
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post #7 of 14
Quote:
I know for a fact it is not the vibrations that are resonating because I suspended the pump to see if that was the problem, and it wasn't, heard the exact same sound. It is sitting on a gel plate too.
If you hold the pump does it stop humming? If so you need to get something to dampen the pump.

If so you can try the Shoggy Sandwich http://www.sidewindercomputers.com/shsacokitor.html



Is it a uniform hum, - is it always there and same volume?
Edited by andrewmchugh - 7/23/11 at 7:32am
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post #8 of 14
My experience has been that they always buzz at full speed even when decoupled.
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post #9 of 14
Thread Starter 
Quote:
Originally Posted by Big Elf View Post
Even though the start up voltage is supposed to be 8v they'll run at 5v and that really quietens them down albeit with a lot lower flow rate. I also had one connected to a fan controller (Lamptron FC2, 45W per channel) and it also runs fine but you have to be careful setting the speed as if it's too low it won't start. I replaced them with Laing D5s in the end.
You had the same pump, and the fan controller helped? That sounds great. I think I will go ahead and purchase a fan controller. (i'll try to find one used first).

I did try plugging it into my cpu header, and I cant at all change the speeds. I tried using AMD overdrive as there is a Fan Control option there.

Quote:
Originally Posted by andrewmchugh View Post
If you hold the pump does it stop humming? If so you need to get something to dampen the pump.

If so you can try the Shoggy Sandwich http://www.sidewindercomputers.com/shsacokitor.html



Is it a uniform hum, - is it always there and same volume?
It is uniform. Does not change at all. But its really annoying.

Quote:
Originally Posted by Big Elf View Post
My experience has been that they always buzz at full speed even when decoupled.
Im sorry for the noob question... but what does decoupled mean?


Thanks everyone for your suggestions. It has helped a lot so far.
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post #10 of 14
Decoupled just means isolated from anything that could cause resonance or vibration i.e. suspended by the tubing, although stiff tubing can also transfer vibrations.

Make sure you get a controller that handle the wattage. I've been told that the start up voltage is also greater than the nominal voltage (18W) but I don't know if that's the case and by how much. I factored that in when deciding on the Lamptron FC2 though. In the end, before I got the D5s, I just plugged it into a molex adapter that provided 5W but that was on a simple loop with few components so the drop in flow rate didn't matter too much.
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