Every AIO on full speed DDC pump and even D5 produce some noise.
You can't find completely silent pump. Example my CORSAIR H100 produce grinding noise when fan controller is on low.
People RMA coolers because of that I didn't want because I keep on Balanced where noise gone completely. 
Same is with other coolers... Good example is pump on Fury X whine and card produce coil whine.
Looking all others coolers and video clips over net I can say EVGA Hybrid is very good, even excellent.
If no problem with temps you can drop pump speed with molex modification for 7V or with motherboard BIOS with 70% of voltage for that fan controller.

Vlada011
Every AIO on full speed DDC pump and even D5 produce some noise.
You can't find completely silent pump. Example my CORSAIR H100 produce grinding noise when fan controller is on low.
People RMA coolers because of that I didn't want because I keep on Balanced where noise gone completely. 
Same is with other coolers... Good example is pump on Fury X whine and card produce coil whine.
Looking all others coolers and video clips over net I can say EVGA Hybrid is very good, even excellent.
If no problem with temps you can drop pump speed with molex modification for 7V or with motherboard BIOS with 70% of voltage for that fan controller.

I am trying to source an adapter to convert the pump cable to a typical 3-pin or 4-pin, so I can do as you mentioned, but so far I've only found one and it ships from China. I suppose I'll have to order that one if I can't find it anywhere else.

I have this too and it is really annoying. It sounds like a bad power transformer and is completely unacceptable on a 650 pound graphics card. I can confirm that mounting the fan the other way does not improve the situation.

What is very annoying is that I looked at loads of reviews and not one of them mentioned this issue. I can only assume it does not affect all 980TI Hybrids. I also have a lot of bubbling and gurgling. Once it warms up it is fine but in normal windows I hear gurgling and buzzing. 
Very disappointing.

Have you tried running Heaven or another benchmark for long periods?

dellycowboy
I have this too and it is really annoying. It sounds like a bad power transformer and is completely unacceptable on a 650 pound graphics card. I can confirm that mounting the fan the other way does not improve the situation.

What is very annoying is that I looked at loads of reviews and not one of them mentioned this issue. I can only assume it does not affect all 980TI Hybrids. I also have a lot of bubbling and gurgling. Once it warms up it is fine but in normal windows I hear gurgling and buzzing. 
Very disappointing.

You think Asetek care how much cost graphic card. EVGA only need to underline them importance of silent pump and nothing else.
Look Fury X cost even more 690-700$ and much more people complain on that, and reviews reports annoying whine from pump. T
hey build such noisy pump and she leave very bad impression on customers from first days of launching Fury X.
And what AMD can do... If CM or Asetek are not aware of importance to build something completely silent, probably and something like that is not possible for 40-50$ pump with radiator. And they need to build even for 30-40$ everything if customers don't want to price cross 100$ in store.
Like you say I think that people are maybe more sensitive to noise and maybe few samples are little noisy under idle.
Temps are fantastic, probably pump work even faster than need because more space for OC.
 
I think Hybrid is excellent solution, I would not afraid at all of little noise, even water cooling pumps DDC, D5, most models became noisy over level 2 speed. But Hybrid will evolve 100% in future, and next year maybe customers even get possibility to change pump speed with software. 
 

dellycowboy
I have this too and it is really annoying. It sounds like a bad power transformer and is completely unacceptable on a 650 pound graphics card. I can confirm that mounting the fan the other way does not improve the situation.

What is very annoying is that I looked at loads of reviews and not one of them mentioned this issue. I can only assume it does not affect all 980TI Hybrids. I also have a lot of bubbling and gurgling. Once it warms up it is fine but in normal windows I hear gurgling and buzzing. 
Very disappointing.

That doesn't sound normal to me. I've used Corsair AIO cpu coolers before and that happens for maybe 5-10 seconds while everything is starting up anyway. But it goes away after that. I'd stick with it if you can since there's no stock around, and once more stock becomes available request an RMA.

Same issue that I had before.
 
People who says all AIO cooler has pump noise, are you sure you used all AIO cooler??
 
For me I used H105 as CPU(before H110) both cooler did not had pump noise at all. All I could hear was little pump noise when the PC boot.
 
I contact EVGA for RMA the Hybrid Cooler but they said it is normal.
 
So here is what I have done
 
Corsair H75 Copper plate is plate so it wont be fit on graphic card

 
 
but EVGA Hybrid Cooler copper base is same as below picture.

 
so take the cooper plate from Hybrid Cooler and install into H75 as picture below

 
It will looks like this when it is finish.

 
Install is easy. You can install into reference shroud but need to modify little bit of shroud. So I recommand you buy spare cooler from ebay or something

 
This is how it looks like when you install in PC

 
By using H75 no more pump noise at all and also the pump speed can be control by MB or fan controller.
 
I have used H90 , H75 , X31 for above modification but best result was H75
 
So my opinion on EVGA hybrid cooler pump is not good pump has been used. 
 
Same PC part but just pump has been changed and pump noise has been gone even on idle and full load. Also for the performance it is slightly better than EVGA Hybrid stock pump
 
 
 

Very interesting to know that.
 
Now EVGA need to put Corsair AIO on their cards. 
 

I'm in the process of an RMA, and I have the buzzing noise. With some investigative work, it turns out it's not the pump ( that's extremely quiet ), but the standard Nvidia fan. On mine,  there seems to be "resistance", like maybe a bad bearing or out of balance fan issue. 
 
For those that have confirmed pumping issues, you should not hear anything but a mild humm. Those that are unconfirmed, check your memory fan, it might be that ( rubbing on the inside of the shroud / balance issue / early bearing failure ). 

Hi all,
 
I got my hybrid kit and so far almost happy with it , I don't think I hear any "loud" pump noise , I can only hear the pump working when I put my ear next to it (they do have to make some kind of noise since they are turned on ) so to me that might be normal noise. My issue seems to be one of the tubes is vibrating really hard non stop, the other tube for example vibrates but very light and hardly noticeable.  This is making my case rattle , when I put my hand on the side of my case I can feel the vibration.   So my question is are the tubes supposed to vibrate at all?  what about the intensity? 
 
Thanks in advance for any clarification , I need to know if I have to RMA this unit (i hope not)  if both tubes were vibrating like the one that is hardly doing it , very light I would be ok I think.