About a month and half ago I started to notice a intermittent clicking sound coming from my 3090 Kingpin, then 2 weeks ago it became constant and unbearable and it was the pump.
 
I read it was a common problem and to RMA the card so I did and they offered to replace the card. I had an ERMA next day(but they sent it ground, no big deal) i paid for along with the 10yr warranty. So 22 days ago I got the replacement card, and it boots up just fine, i noticed that it was set on the LN2 bios which on OG card i don't use that cooling so I got concerned that it has been more stressed than my card.
 
I did some normal game test and 3dmark benches and the card seems significantly worse than mine.
 
RMA Card
Cp2077 3440x1600 - i lost about 5-10fps (not huge deal) i only notice this as it constantly drops below 60fps
Time spy - GPU score is 2100 lower (og card 22191 score)
Port Royale - i can't break over 14400 (og card 15000)
Temps on this card are 5c more on memory and 8c on core on load
Coil whine is now audible at anything above 70+ FPS
 
I know i wasnt going to get a new card and knew that they are replacing based on advertising specs and i get that but it seems this card went through the ringer from the previous owner. 
 
I have put on hybrid coolers before am I just really want to keep my pristine card and replace the hybrid cooler...but don't want to break warranty on either card as they are holding $4600 until i return the card.
 
I wrote a support ticket but with the limited time i have to return the card i am worried. (Hoping some team member can assist or give advise.)

In this thread: https://forums.evga.com/Kingpin-3090-pump-noise-m3230913-p4.aspx EVGA allowed a member to swap out the 3090 KPE cooler. Agree with what cancel077 said, get their approval first. 

For Hybrids, EVGA needs to start authorizing and sending out the AIO since it seems to be a weak point on their hybrid models and just users swap if their card is running fine outside of that and send back the AIO. If I'm happy overall with my card I sure as heck don't want to get a refurb with potential issues if I can just swap the cooler myself.
 
I know on my KPE 3090 before I sold it the AIO started to make noise 6-7 months in and I ended up hooking it up manually and slowly ramping it up while tapping and using a magnet and that got rid of the knocking and it never returned even when I hooked it back up to the card.
 
I know my KPE 3090 did start to whine >100fps but I was playing 60fps due to display limitations but when I let the frames run wild and scaled by 10fps ~100fps is when you would hear the card start to say, "hello." or I could just run TS and it would speak up but not horrifically.
 
With my KPE 3090ti it is basically silent even pushing 180fps+ and runs perfect. I'd hate to have to swap the whole card and get a potential used, refurb coil whine mess. Just send me an AIO and call it a wrap.
 
 
 
 
 
 

I read that TG(Thermogrizzly) Kryonaut may be less optimal for AIOs and was wondering what paste i should use out of the options i have 

Kyronaut
https://www.verkkokauppa.com/fi/product/530700/Thermal-Grizzly-Kryonaut-lampotahna-0-27-ml#list=OZCYkR5haz8YBMrF5YOqg5hGhW1zU1vYtDJcC
 
Hydronaut
https://www.verkkokauppa.com/fi/product/527552/Thermal-Grizzly-Hydronaut-lampotahna-1-5-ml
 
Noc NT-H1
https://www.verkkokauppa.com/fi/product/58448/Noctua-NT-H1-lampotahna#list=OZCYkR5haz8YBMrFKVADvCuywg5hGhW1zU1vYtDJcT
 
 
 

all i I could get my hands on was noc NT-H1 as KPx isnt something i can find in Finland :(

Well I can't say if it is wide occurrence but what is more flustering is the shipping costs. It is 315 euros to ship the RMA card back.

I have always bought EARs to cover warranty issues but in EU the EAR doesn't support shipping back and the insurance on these cards what gets us.

Just a bummer that this a decently documented issues that imo should be covered especially if it is pump hardware which basically is recycled for materials after it is replaced.

Either way they let me keep my original card and replace pump, so i took videos of the process and ran them through 3dmark.

Original card +161 +1000 stock bios 105w
RMA card +103 +1100 stock bios 105w