stgrosso
I had the hybrid and the pump buzz noise too. From what I saw, this sound is just typical for every AIO. Just see at youtube others AIO solutions ("corsair pump noise") and you will notice that all AIO made exactly the same buzz noise.
 
With the radiator-fan at 7v you will notice the pump noise. It made me crazy :O.
 
Now I have a SC+ ACX2.0+ and I'm very, very happy with: very quite and cool at full load.
 
Either you go for a custom loop or for air-fan, if you need SILENCE at idle like me.
 
My opinion.

Looks like my hybrid's pump buzz is here to stay, I've had my PC on for 72+ hours and there's no change in sound. Even with my two system fans and the radiator fan running at 12v I can still detect the buzzing sound.
 
It's a neat trick to have a card this powerful stay at 43C after hours of gaming but honestly I'd rather have a card that ran at 70C and didn't make a buzzing sound. I have a big case that works fine with air coolers and keep my PC in a cool basement so heat isn't that much of a concern for me. The hybrid cooler didn't allow me to pull off any kind of amazing OC either, I've settled on around 1450-1500 MHz which seems doable by most of the custom PCB/air cooler solutions out there. 
 
I guess that in retrospect, for the qualities that I value (noise > speed/overclockability > temperature), I would have been better off waiting for a custom 980 Ti than buying a reference one and putting a hybrid cooler on it.

parkerlewis

stgrosso
I had the hybrid and the pump buzz noise too. From what I saw, this sound is just typical for every AIO. Just see at youtube others AIO solutions ("corsair pump noise") and you will notice that all AIO made exactly the same buzz noise.
 
With the radiator-fan at 7v you will notice the pump noise. It made me crazy :O.
 
Now I have a SC+ ACX2.0+ and I'm very, very happy with: very quite and cool at full load.
 
Either you go for a custom loop or for air-fan, if you need SILENCE at idle like me.
 
My opinion.

Looks like my hybrid's pump buzz is here to stay, I've had my PC on for 72+ hours and there's no change in sound. Even with my two system fans and the radiator fan running at 12v I can still detect the buzzing sound.
 
It's a neat trick to have a card this powerful stay at 43C after hours of gaming but honestly I'd rather have a card that ran at 70C and didn't make a buzzing sound. I have a big case that works fine with air coolers and keep my PC in a cool basement so heat isn't that much of a concern for me. The hybrid cooler didn't allow me to pull off any kind of amazing OC either, I've settled on around 1450-1500 MHz which seems doable by most of the custom PCB/air cooler solutions out there. 
 
I guess that in retrospect, for the qualities that I value (noise > speed/overclockability > temperature), I would have been better off waiting for a custom 980 Ti than buying a reference one and putting a hybrid cooler on it.

You say!

I reach with my SC 1480mhz rock stable. Temp 74c and noise quite, much quieter than reference card. See the reviews: the SC is almost the quietest card on air.

Cheers

parkerlewis
 
Looks like my hybrid's pump buzz is here to stay, I've had my PC on for 72+ hours and there's no change in sound. Even with my two system fans and the radiator fan running at 12v I can still detect the buzzing sound.
 
It's a neat trick to have a card this powerful stay at 43C after hours of gaming but honestly I'd rather have a card that ran at 70C and didn't make a buzzing sound. I have a big case that works fine with air coolers and keep my PC in a cool basement so heat isn't that much of a concern for me. The hybrid cooler didn't allow me to pull off any kind of amazing OC either, I've settled on around 1450-1500 MHz which seems doable by most of the custom PCB/air cooler solutions out there. 
 
I guess that in retrospect, for the qualities that I value (noise > speed/overclockability > temperature), I would have been better off waiting for a custom 980 Ti than buying a reference one and putting a hybrid cooler on it.

That's too bad. Are you going to just live with it or request an RMA?

parkerlewis

stgrosso
I had the hybrid and the pump buzz noise too. From what I saw, this sound is just typical for every AIO. Just see at youtube others AIO solutions ("corsair pump noise") and you will notice that all AIO made exactly the same buzz noise.
 
With the radiator-fan at 7v you will notice the pump noise. It made me crazy :O.
 
Now I have a SC+ ACX2.0+ and I'm very, very happy with: very quite and cool at full load.
 
Either you go for a custom loop or for air-fan, if you need SILENCE at idle like me.
 
My opinion.

Looks like my hybrid's pump buzz is here to stay, I've had my PC on for 72+ hours and there's no change in sound. Even with my two system fans and the radiator fan running at 12v I can still detect the buzzing sound.
 
It's a neat trick to have a card this powerful stay at 43C after hours of gaming but honestly I'd rather have a card that ran at 70C and didn't make a buzzing sound. I have a big case that works fine with air coolers and keep my PC in a cool basement so heat isn't that much of a concern for me. The hybrid cooler didn't allow me to pull off any kind of amazing OC either, I've settled on around 1450-1500 MHz which seems doable by most of the custom PCB/air cooler solutions out there. 
 
I guess that in retrospect, for the qualities that I value (noise > speed/overclockability > temperature), I would have been better off waiting for a custom 980 Ti than buying a reference one and putting a hybrid cooler on it.

I'm in the same boat. It's quieter at load (which I never really cared about), but noisier at idle due to the buzz, and didn't help my OC at all. I am maxed at 1480/8000 which is what I ran with the reference cooler.
 
I'm not sure what I'll do yet. I might return it but I'm not looking forward to having to remove it and reinstall the stock components.
 
Edit: If it wasn't obvious I am the guy from earlier in the thread... dunno how I ended up with two accounts.

i have 2 TitanX Hybridcoolers since Today and the buzz sound to. Its louder then the Refcooler on Idle. The Fan is not a Problem but the Pump....

Can you share a picture of the radiator oreientation and location in the case?
 
If your tubes are on the topside of the radiator, try mounting on bottom like below picture. Also try mounting the radiator at a higher position than the GPU if at all possible:
 

EVGA_JacobF
Can you share a picture of the radiator oreientation and location in the case?
 
If your tubes are on the topside of the radiator, try mounting on bottom like below picture. Also try mounting the radiator at a higher position than the GPU if at all possible:
 

I can't mount it that way due to the proximity of the card to the mounting area. I'd venture to guess most people can't. See my prior post (#7).

People, this pump makes buzz noises which are just typical for a AIO that works at full speed. And the pump works here only at full speed. This is my experience so far.
 
Either you live with that or RMA for a refund.

stgrosso
I had the hybrid and the pump buzz noise too. From what I saw, this sound is just typical for every AIO. Just see at youtube others AIO solutions ("corsair pump noise") and you will notice that all AIO made exactly the same buzz noise.
 

This is bull, as my Corsair AIO cpu cooler does NOT have this issue. 

chrisdglong

stgrosso
I had the hybrid and the pump buzz noise too. From what I saw, this sound is just typical for every AIO. Just see at youtube others AIO solutions ("corsair pump noise") and you will notice that all AIO made exactly the same buzz noise.
 

This is bull, as my Corsair AIO cpu cooler does NOT have this issue. 

Maybe because you can set the speed?
 
I saw many videos on youtube "corsair pump noise" and ALL have this buzz sound when at full speed...