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Silencing Laing DDC 3.25

post #1 of 18
Thread Starter 
Hi All,

Just built my first watercooling system and it is dope! I wanted it to be completely silent but the pump makes a noticeable amount of noise. I got the quietest one on the market (rated for ~31 dB) but it's louder than I'd like. Specs are in sig. Here are the WC specs:

- Heatkiller 3.0 Cu block
- 5870 Waterblock
- Black Ice GTX 360 Radiator w/ (3) Scythe Gentle Typhoon 1450 rpm fans
- Laing DDC 3.25 - 12V 18 Watt Version
- XSPC Acrylic Dual 5.25” Reservoir for Laing DDC
- (2) 230mm fans

Fans are totally silent (paid good money for the scythe fans for that reason), but I want a way to quiet down the pump. It's attached to the XSPC reservoir.

I was thinking I could wrap the pump with Dynamat, and wrap the 3 sides and maybe the top of the reservoir as well. Anyone try that, or have any other ideas?

Thanks in advance.
post #2 of 18
http://www.sidewindercomputers.com/shsacokitor.html
Old man river
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Old man river
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post #3 of 18
Go to hobby lobby and get a piece of craft foam for 50 cents instead.
Seeing Red
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Seeing Red
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post #4 of 18
My 3.25 isn't loud at all. I can't hear it over my 3 GT AP15's. It is in a case with some 1/8" foam pads on both sides though. I never thought it helped much though.
post #5 of 18
my mcp350 was slightly audible from vibration, i cut up some feet from a gel block, now it's dead silent

http://www.petrastechshop.com/pegviabbl.html
post #6 of 18
Any of the above mentioned methods work great for silencing a pump. Just be careful not to cover the bottom of the Laing DDC as it will overheat and fail. With the gel and shoggy sandwich you have to cut the silencer kit into two pieces and attach one to each foot of the pump, leaving the middle exposed.
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Labor of Love
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post #7 of 18
Thread Starter 
Lots of good feedback here, thanks for the help.

However, the pump is mounted to the XSPC Reservoir - so it's not sitting on anything or touching the case. And the XSPC res is mounted to the case via 4 rubber feet, so I don't think it's getting transmitted there. I believe it is just the pump noise.

Any other ideas? Thanks, and +rep to those who helped.
post #8 of 18
Thread Starter 
Here is a video clip I found online of another guy's system. You can hear the whirring noise of the pumps. It's not bad, but I wanted the system SILENT. He messes with the fan controls a little in the video.

http://www.vimeo.com/8842759
post #9 of 18
Can you describe the noise itself? Maybe your loop has not been fully bled.

My 655 pump was dreadfully loud until I tilted my case and bled the loop.
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post #10 of 18
Thread Starter 
It's just a "whirring" noise, not a cavitation noise. I bleed the system, tilted the case all around, let it run for a day and I don't see a single bubble but I do hear that whirring. I'm thinking maybe I should try to fit rubber washers between the pump and the acrylic, perhaps it's the contact of the pump against the reservoir that is causing the noise. I'm not sure how big of a washer I can squeeze in there without disrupting the o-ring seal though.
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