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post #11 of 37 (permalink) Old 02-05-2019, 10:18 PM - Thread Starter
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Quote: Originally Posted by broodro0ster View Post
This is what my D5 vario sounds like at full speed: https://youtu.be/n6S03fiI6pg

But’s noisy between level 2 and 3. Level 1 is super quiet, but not enough flow for a big loop. That why I prefer PWM now. The D5 vario is only for testing and testing parts in a loop on the bench.
That’s exactly what mine sounds like. Both of your pumps make this noise ? This will be the loudest part of my build ! Dead quiet PC with a high pitched ring. I’m not sure what to do.

Last edited by NewType88; 02-05-2019 at 10:30 PM.
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post #12 of 37 (permalink) Old 02-05-2019, 10:22 PM - Thread Starter
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Quote: Originally Posted by Darren9 View Post
I had to fully decouple mine to have it as quiet as I wanted, if you fix it to a res or the case or anything else it acts as a sound board and amplifies any sound. I ended up with the pump (D5 vario with an EK top) resting on two squares of gel with just soft tubing connecting it to the rest of the system. Before moving it to the bottom of the case sitting on gel when I changed cases I had it hanging off the top rad in mid air by the tubes. Both worked equally well.

I live in an isolated cottage with quite low ambient noise, at setting 3 it didn't make any noise and I had to touch it to be sure it was working.
Mine is decoupled and is on an external rad (mo-ra3) I don’t feel any vibration at any rpm, it all feels smooth.
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post #13 of 37 (permalink) Old 02-05-2019, 11:23 PM
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Quote: Originally Posted by NewType88 View Post
That’s exactly what mine sounds like. Both of your pumps make this noise ? This will be the loudest part of my build ! Dead quiet PC with a high pitched ring. I’m not sure what to do.


Yes, both pumps are this loud. But as I said before, my pc is dead quite because I turn down the pump for low workloads and idle. Only when the fans kick in, it speeds up. And in that case my fans are louder than the pump.

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post #14 of 37 (permalink) Old 02-06-2019, 08:28 PM - Thread Starter
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Quote: Originally Posted by broodro0ster View Post
Yes, both pumps are this loud. But as I said before, my pc is dead quite because I turn down the pump for low workloads and idle. Only when the fans kick in, it speeds up. And in that case my fans are louder than the pump.
I cant drown it out though, my fans at max are just 800rpm. Its super loud and I just hooked everything up and turned it down to its lowest setting and can still hear it. Its like tinnitus. If I cant stop this noise or find a pump that doesn't do this I'm going to go back to air.
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post #15 of 37 (permalink) Old 02-07-2019, 06:00 AM
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Quote: Originally Posted by NewType88 View Post
I cant drown it out though, my fans at max are just 800rpm. Its super loud and I just hooked everything up and turned it down to its lowest setting and can still hear it. Its like tinnitus. If I cant stop this noise or find a pump that doesn't do this I'm going to go back to air.
Hmmm, once my fans spin at 800rpm I can't hear the pump at 3000rpm.
My system runs passive at idle with just the pump at 1500rpm and the HDD spinning. The noise of the HDD is louder than pump so I don't hear it.
And even when I disconnect the HDD, I can barely hear my pump.

You might have a bad pump or the loop isn't fully bleeded yet. Did you also think about decoupling the pump as much as possible? This also helps a lot.

If doesn't get any better, try to swap the pump. Also note that the PWM goes down to 800rpm while the non PWM version is around 1500-1800rpm at it lowest setting so thats also something to consider.

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post #16 of 37 (permalink) Old 02-07-2019, 06:48 AM
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It's been a while back (few years?). But there was someone like you who just couldn't handle the noise. So he relocated his pumps and rads into his basement and ran the tubing through the wall to external disconnects. His results were quite nice as well due to the cooler temps in the basement. I wouldn't even begin to know where to find the build log here and what it was called.

Doing something like this adds expense and time, but it would make draining a loop a breeze with external disconnects and gravity! It would also remove all of the noise you hear. I know its likely an unwelcome project though. It would however solve the issue.
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post #17 of 37 (permalink) Old 02-07-2019, 08:16 AM
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Quote: Originally Posted by NewType88 View Post
I cant drown it out though, my fans at max are just 800rpm. Its super loud and I just hooked everything up and turned it down to its lowest setting and can still hear it. Its like tinnitus. If I cant stop this noise or find a pump that doesn't do this I'm going to go back to air.
All of the D5s I've owned (or come into contact with) have the high pitched whine, but only above ~2300 rpm. If you are getting at lower speeds to the point it is invasive there may be an issue. Decoupling won't help the whine, unfortunately. I have always run D5s with a curve based on liquid temp, and that has them sitting at 1850rpm 90% of the time, so I never really found it to be an issue. DDCs tend to be worse in this regard, so that won't be a help. The Swiftech MCP50X may be a solution if you are running it at low-mid rpm, but if you are trying to run it full out it will get louder than a D5 - http://thermalbench.com/2015/01/05/s...mcp50x-pump/4/

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post #18 of 37 (permalink) Old 02-07-2019, 08:43 AM
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I have the dual D5 pump top from EK with the res adapter (discontinued) and the high pitch whine coming from mine aren't as loud as that though I have had some that were like that if not louder. Currently running 2 Swiftech D5's set between 3-4 and they're very quiet. I have 3 Alphacool D5 varios and one of them is pretty loud as far as the high pitch whine (It's in my server in a separate room and I don't have to listen to it thankfully) where the other 2 were practically inaudible in comparison as well as my EK D5 Varios. I can't really say you have a faulty pump though considering that one noisy D5 I have is still going after 5+ years in my server and I was positive it was going to fail. My experience though is they all make some noise and being sensitive to high pitch sounds makes it quite annoying at times.

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post #19 of 37 (permalink) Old 02-07-2019, 08:53 AM
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Quote: Originally Posted by outofmyheadyo View Post
The reason I moved from water to air, D5 was even audible @ the lowest setting.


Wouldn’t your fans be louder on air then your pump ever was?

To the OP you ever consider another pump, though it does sound like it might have air in it.
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post #20 of 37 (permalink) Old 02-07-2019, 11:43 AM
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My fans were running 500rpm regardless of load, and d5 @ setting 1 was the loudest part, if u dont count coilwhine, but the D5 was constant all day err day, and that got annoying quick, I could even hear it when my case was under my table.

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