Aerochrome
I got my new 2080 running today in vertical install bracket, and after the expected gurgling for a few seconds the pump went silent.  After about an hour of idle, I noticed a new noise from my PC, the pump now sounds like the compressor in a small refrigerator!  I tried moving it to a normal horizontal configuration, but it was no different.  I troubleshooted it (stopping fans, removing card) and verified that it is indeed the pump.  Any tips before I RMA?

Aerochrome
No, I mean i mean the pump sounds like a compressor in a minifridge. Even when the fans aren't running. Also it doesn't sound like trapped air, it sounds like something in the pump is physically misaligned.

rchiwawa
For my 400HY1484B1 I have attempted some noise mitigation with modest success.  The pump is still noticeably audible but it is both quieter and has a lot less spectrum going on.  I cut a piece of spare mouse pad to shape to sit between the rad and my case, felt side toward the case fwiw and pictured below are spectrographs from my seated position at the computer of what is audible.  I positioned the phone's microphone as close to my ear directed toward the case both times, from the same spot, same loading (running folding at home.  It's not a dramatic improvement but I feel it was worth my 30 minutes and you might attempt something similar if the noise is as bothersome to you as it was to me.  This made things much more livable.
 
[graphics snip]

Aerochrome
 
The noise seems to be coming from the pump itself, not the radiator housing.  The noise did not seem to change in "volume" even when the radiator assembly was physically detached from the case. We are talking about the radiator/fan assembly right?
 
I had an MSI unit before this that had a pump that produced imperceptible noise, and I'll have to swap back to it and get a refund if the second RMA unit it seems I'll have to inevitably request does not pan out.

fakum
So I just received my 2080 Ti FTW3 yesterday. I had to replace my 980 Ti Hybrid as it died (out of warranty). I use this PC for DCS Combat Flight sim, Work from home and I am also getting ready to jump into VR. I needed a replacement, and I wanted the horsepower to run better graphics for gaming and VR. In addition, I spent alot of $ getting Case fans that were pretty much silent, I even have a corsair H115i CPU cooler. Before my 980 Ti died, I was not even sure the PC was running, there was next to no noise.
 
Now this Freakin $1500 Son of a beach!!!! WTH,,, really,, after all of that $$$. So I went thru the air bubble removal process, I certainly had that noise on initial startup,, then it quieted down. But that ANNOYING refrigerator noise in my ear,,, just not tolerable! I spent the night and today reading the forums, watching the Youtube vids etc. Took the card back out, even though I was confident at that point it was not air related, I did it anyway. I even started passing the magnet around the shroud, that didnt really solve anything for me.
 
 I dont know if I can send this back, but if I can, I think I would rather hear the noise of fans running then this pump, seriously! I figure at least when I am working, the fans wont be cranked, and when Im gaming, the gaming noise would drown out most of the fan noise. for me anyway, fan noise would be much better tolerated. I swear I have this ringing in my ear now. Oh, and Im not at all interested in learning how to hack my motherboard and set some sort of profile to run the pump off the motherboard as I have seen. Thoughts on another optional replacement that is air cooled, but not unreasonably loud would be helpful, thanks in advance.

fakum
@AHowes, I dont have any more room in my case for a 2nd 240mm RAD. And I did not know that the pump on the Kingpin was different, and quiet. Thanks though.
 
@CTXJackBauer, That looks like a good option, but does that void the warranty on the GPU?
 
@kevinc313, Thanks for the advise, as I stated though, that is not something Im interested in doing. I wont rule it out, but that would be my last resort i think.
 
 

fakum
Thats kinda what I am thinking also. There are none of those "Stickers" that are across any screw holes that say "Warranty Void if Removed" is there? Thanks, This seems like the simplest approach perhaps, outside of the fact that I pissed the $ away for the expense of the Hybrid i suppose.