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How to slow down pump speed of non-vario Laing D5?

post #1 of 9
Thread Starter 
Hi,

My build has been finished for quite a while now but my pump is by far the loudest part of my computer. I do not have the vario version of this pump so I cannot slow it down by that.

My question is what should I use to undervolt it and what voltage do I want it to be at. I don't need extreme performance as I only have my cpu in my loop and temperatures are great.

Thanks for any help you can give.
post #2 of 9
Any fan controller that can handle the pump load - 24W for a D5

Alternatively you can use a 10kΩ potentiometer (variable resistor) - this has the advantage of being (usually) cheaper and smaller, however will require some soldering. Same deal, make sure it is rated to 24W.
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post #3 of 9
You could use one of these. I use them with my pumps and aquaero 6. http://www.frozencpu.com/products/14279/bus-290/Aquacomputer_USB_Poweradjust_2_-_Ultra_Version_53083.html

Connects to MB with USB and allows flow sensor, temperature sensor as well. Control and monitor from software. Maybe not what you want but an option.
post #4 of 9
A simpler way would be to simply plug it into the +5v line instead of the 12v line, and if that is not enough, you could try 7v by connecting the ground wire to the +5v.
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post #5 of 9
I know my D5's state they need at least 8v to get them moving, so that may be a problem. I originally tried it and 7v would not start it. Once it is up and going the voltage can be lowered.
post #6 of 9
I thought the D5 used the pot as a rheostat? Unless I'm mistaken they're not voltage controlled.
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post #7 of 9
I was under the assumption the D5 was voltage controlled and the only one that isn't is the swiftech PWM version.
post #8 of 9
Get a Lamptron CW611.
But I think merely decoupling your pump for sound would go a long way.
I can't hear my two D5's at full speed when properly decoupled.
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post #9 of 9
And not all pumps are voltage controlled. You have to get a vario one for voltage control on the pump.
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