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Silencing Laing DDC 3.25 - Page 2

post #11 of 18
The Laing DDC + Top is pretty quiet, but it's not silent. Maybe you can undervolt the pump to 7v when you are not using your computer? I did that and it works great, full 12v power when loading and 7v silence when idle.
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post #12 of 18
Thread Starter 

Here is a video of it:


How did you undervolt the pump? It's only a 2 pin molex and a one pin for the tach...
post #13 of 18
Quote:
Originally Posted by spazstic View Post
Here is a video of it:

http://www.youtube.com/watch?v=i15O2ZF_W-w

How did you undervolt the pump? It's only a 2 pin molex and a one pin for the tach...
Soldering irons are cool aren't they? I have a solenoid which switches the pump between the PSU ground and PSU + 5V. The +12v is permanently hooked up to the pump. If the solenoid is on, the ground wire becomes +5V, making the overall potential difference +7V. If it is off, it is +12V.
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post #14 of 18
Thread Starter 
Quote:
Originally Posted by charliehorse55 View Post
Soldering irons are cool aren't they? I have a solenoid which switches the pump between the PSU ground and PSU + 5V. The +12v is permanently hooked up to the pump. If the solenoid is on, the ground wire becomes +5V, making the overall potential difference +7V. If it is off, it is +12V.
Ahhh, very nice. I'm going to have to do that. Question though: will undervolting the pump damage it in any way or reduce its lifespan?
post #15 of 18
No, it actually increases pump life due to reduced winding and motor wear!
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post #16 of 18
Hey Charlie, how did you undervolt it? Using an aquero or something?

There is very little you can do to silence the pump when mounted using a bay top/res. Basically its the pump noise and not a vibration if I am right. So the only way to cut the noise is to undervolt it.
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post #17 of 18
Using a plain joe switch. Mine is electric and run by a custom USB controller I have, but the same thing could easily be accomplished with a SPDT switch mounted to the front of your case.
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post #18 of 18
Thread Starter 
I'm thinking of getting the Aqua Computer Poweradjust 2 USB:

http://www.sidewindercomputers.com/aqcopo2usbul.html

It's a fancy PID controller that has a lot of customizable settings on it. It looks REALLY cool. At $50, the price is kind of steep but I think it's worth it if it'll silence the pump down.

Anyone have any experience with them?
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