My XC3 3080 Hybrid Kit has started making that clicking/ticking noise from the pump.  Thought it was my one old school HDD going bad at first, and now wish it was instead of this issue.
 
Edit: should have mentioned that it's under warranty (60 days left) so I've sent in a ticket.  I took it out yesterday to give it a tilt and gentle shake to see if that would help, but the same result. 

No, that's unfortunately not possible. There's just DC control without any feedback.

Imho yes. 
 
You can set a curve of course. You don't need a feedback to control the pump. you even can hear it while trying. you're just not able to see the current rpm :)

Pwm is 4-pin :) DC is 3-pin. The pump doesn't have any sensor/feedback. So it's just 2-pin.

naturian
Pwm is 4-pin :) DC is 3-pin. The pump doesn't have any sensor/feedback. So it's just 2-pin.

2 or 3 pin, still the same DC powered. 

Still looking around and seeing different images and responses on the cable used in the HYBRIDs.  Not sure if they're constantly changing them on every gen or what.

You can get a cable that will let you plug the pump into your mainboard fan header. You will need to set that header to voltage and not PWM. I currently have mine set to use the CPU temp to adjust the speed of the pump. It is set to 70% voltage at 30-40c and then ramps up to 100% when the cpu hits 50c. Only issue is that the pump will ramp up for short bursts. I got the cable from ebay something likeMale Mini 4-Pin GPU Fan to Female 4-Pin PWM.

this is getting ridiculous. I had a 3080 ftw3 hybrid that i sold to a friend that made absolutely zero noise. was and still is perfect. upgraded to a 3080ti ftw3 and purchased the hybrid cooler separately and installed and the pump noise can be heard from 2 rooms away. this is a well known issue with these gpus and EVGA REFUSES to release a bios update to enable pump control or recall these things. 

eivaldi
Shoot, I wish I had better luck. Currently rolling with a brand new 3080 FTW3 Hybrid and the buzz/grind noise from the pump is pretty rough. It's definitely not air in the pump - it's like that rapid clicking you get when writing to the HDD in an early 2000's computer.

Did the cable mod (HUGE shout out to naturian for the tips on assembly, routing, the 180 flip, and settings). I thankfully didn't have to remove the pump so repasting wasn't needed, and the pads stayed intact.

Unfortunately, no matter what I set the pump to, the sound remains at all levels until about 35% using Fan Control... then it stops/dies at 33% and thermal runaway starts. Or sometimes it just randomly stops at 35 :(

So it looks like I may be one of the unlucky few that this won't work for... My next steps are undoing the cable mod since it really doesn't help at this point, and then I might just RMA the card. It's a pity too because the card itself is phenomenal. We'll see.

eivaldi
I don't think pump control is the best solution anyways - what they really need to do is source a better (quieter) pump. I'd gladly pay 50-100 extra for a better unit if it was an option.

There are a few remedies out there if you want to split away from a noisy pump. 
 
I can't guarantee anything here since I don't have experience with these products but there are options out there, granted very limited.


Option #1:  NZXT Kraken G12 
 
- GPU Bracket in Black or White
 
- Includes a 92MM fan for VRM cooling  
 
- Your choice of CPU AIOs that are compatible with this GPU bracket.

There will need to be some modding possibly since this bracket has been mostly compatible with GPUs from the 2000 series and prior.  Don't see anything about 3000 Series as being compatible on their site and the only ones that I did find, was someone modifying it in a video below.  

Here's the video to it.
 


Now, I'm not 100% sure this will work on EVGA branded GPUs since this is a MSI GPU that the mod was done on but if I had to guess, it should be the same specs across different mfgers but than again, I'm not 100% sure.  Just throwing that out there just in case.



 
Option #2:  Alphacool Eiswolf 2 AIO - 360mm RTX 3080/3090 FTW3 with Backplate
 
- Sealed AIO w/ waterblock + 360mm radiator w/ quick disconnects
 

 
One of the only cons that sticks out to me for Option #2 is, I don't see any cooling going on for the VRM section of the block.
 
And one more thing before I forget, if you want attempt to lessen the audibles even further, have a look at the 120mm Noctua A12s (Chromax for black fans) and or the 120mm Gentle Typhoons AP-15s (1850 RPM).
 
Hope this helps and keep us updated if you do take the plunge with either of these options.

Any tips for me using a fan header to control my GPU AIO pump? I have an ASUS TUF Gaming Z690-Plus. I can't lower it below 60%. I've done the fan configure and switched between PWN and DC and I still can't control it lower. The only work around I found was hooking my CPU AIO and GPU AIO pump to the pump header on the board. Is that ok to split that header?
 
imgur com/a/JEo7Lj2 

I know it is kind of late to answer, but I still would like to share my solution.
It is all about the radiator positioning , the pump is weak so it can hardly pump the coolant to a higher spot.
I put the radiator at the bottom of the case and put the tubes which connected to the radiator stay at the bottom of the radiator , that's how I eliminated the noise.