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Looking for some advice on redesigned pump setup for noise reduction. - Page 2

post #11 of 15
ok so my loop is up and running now, big improvement on pump noise.
Originally, the pump was was stuck to the floor of the case using the spongy adhesive block they give you with the 35x. It was also connected to a tube res and a radiators using only fittings. with that config, it was very loud.. I think the tube res with it's weight sitting on the pump added to the vibrations, and the radiator also amplified them..

The pump is now mounted on a UN 120mm mount that sits on a fan. It's decoupled from the mount using rubber grommets on the screws, and the mount is decoupled from the fan. Also, both of the outlets are now barb-tube, no 'hard mounts'.

I can hardly hear it now when it's under 3200-3300 RPM. at max (4450), there's a slight 'hiss'.
All my fans are running very slow (can't hear them at all) and i'm extremely sensitive to noise.. it drove me crazy when it was humming loudly at any rpm except bare minimum...
    
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post #12 of 15
Thread Starter 
Thanks for the update. I just got some new parts and will start on my rebuild soon.
post #13 of 15
Quote:
Originally Posted by pgdeaner View Post

I currently have the Koolance 1U res below:

http://www.frozencpu.com/products/16426/ex-res-375/Koolance_RP-401X2_Single_525_Reservoir_w_PWM_Pumps_Installed_Rev_11.html?id=zsgyLsWc&mv_pc=164

The only thing I can hear when my system is running is a slight hum from the MCP35X mounted in the res. I'm sure it's the pumps because I can vary the RPM with software and the noise changes in pitch with the changes in RPM.

I'm thinking about pulling the pumps and installing them in the swiftech dual or EK pump top for dual pumps then using an internal res like this one.

http://www.frozencpu.com/products/17509/ex-res-432/EK-MultiOption_RES_X3_250_-_Liquid_Cooling_Reservoir_6_Total_Ports.html?id=zsgyLsWc&mv_pc=366

The goal of the rebuild other than to see what I can do with an NZXT 630 will be to get rid of that humming from the pumps as much as I can. I have thought about mounting the res directly to the pump top using something like this:

http://www.frozencpu.com/products/15532/ex-tub-1229/XSPC_G14_Male_to_Male_Extender_-_5mm_-_Chrome.html?id=zsgyLsWc&mv_pc=365

But I'm concerned that the vibration will be transferred to the tube res and cause resonance.

Anyone have experience/suggestions on mounting a dual MCP35X (PWM of course) to reduce the noise when running? Any input would be appreciated.

Thanks in advance. biggrin.gif

it's not the pump it's the res in the bay, sometimes with bay res's you only need to add some thin rubber to the sides of the res to get rid of the vibe. thumb.gif

Also if your going to join the res and pump don't use male/male fitting unless it's a rotary one thumb.gif

nonononononono
yes yes yes
http://www.frozencpu.com/products/15175/ex-tub-1167/Alphacool_G14_Male_to_Male_Rotary_Extender_-_Chrome.html?tl=g30c101s744

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post #14 of 15
If you do hang the pump from the tubing, the longer the tubing, the better the pump isolation is.

Another option is using soft open-cell foam. Frost-King has various size thicknesses. This can be found in Walmart, Lowes, etc. to set the pump onto with no tension on the tubing. Several people have done this with great success:thumb:.

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post #15 of 15
Hang yoyr pump by the hoses. Even Martin of MLL does it. The best pump mount is no mount at all.
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