Issue with Eiswolf 2 AIO, rattling pump noise

[MellowsNL]

Hello,

Recently i decided to try watercooling, so i jumped in easy with a simple AIO solution for my 4090.
This worked out fine for the week or so that i had it, but all of a sudden the pump has started to make this very annoying rattling noise that gets worse with higher rpm.

Does anyone have any idea what it could be? or is the pump dying? any help would be appreciated.

I've attached a video, you may have to raise your volume a bit.

edit: typo's

 

[Eddy]

That sounds very much like microbubbles in the pump. A very typical unpleasant noise. Set the pump speed to max rpm. Then, while it's running, just press down on the hoses repeatedly with your fingers. Alternatively, tilt and shake the system a bit. Quickly turning the pump on and off in idle mode can also help.

But I must say, it can take a while to get rid of this issue. It can indeed be frustrating until it works.

 

[MellowsNL]

Hey Eddy,

Thanks for trying to help, i'll try to do that.
I was wondering though, the pump in the waterblock is the DC-LT 2 and on the alphacool store page it says it runs at ~2600 rpm, but if i set the pump fan header to 12v/100% it'll go as high as ~3000 rpm. Is that a problem? I've been manually setting it so it runs around ~2600.

edit:
Just to clarify why i'm doing this, we're trying to move the air from the pump to the radiator i'm guessing? why did it only start doing this now? after about a week of use. and won't it just come back again?

 

[Eddy]

header to 12v/100% it'll go as high as ~3000 rpm. Is that a problem? I've been manually setting it so it runs around ~2600.

No it is not. The newst version of that pumps is running with a bit higher rpm, that is normal.

Air sometimes moves in strange ways within a cooling loop. All it takes is for a bubble to get caught in the water flow and move along with it. This usually leads to more bubbles being drawn in due to surface tension, and then you have a problem. This is a common issue with AIOs (All-In-One coolers), including the various AIOs for CPUs on the market. These noises occur quite frequently. The problem is simply that the pumps are too weak to push the air back out. But stronger pumps are inherently larger and would not fit into the AIO.

 

[MellowsNL]

No it is not. The newst version of that pumps is running with a bit higher rpm, that is normal.

Oh! that's good to know, i'll let it run at 12v then.

Tilting the case does seem to have somewhat fixed it, it'll be quiet for a while and then it'll make the noise again for a bit and turn quiet again. i'll keep working at it.

This is a common issue with AIOs (All-In-One coolers), including the various AIOs for CPUs on the market.

I see, soooo lets say i'd want to upgrade my AIO solution, right now i have the "Alphacool Eiswolf 2 AIO - 360mm RTX 4090 Suprim with backplate"
i imagine i can keep the radiator and gpu waterblock and remove the pump part from the waterblock and buy a reservoir with a pump. or am i missing something?

And thanks again for helping out!

 

[Eddy]

or am i missing something?

Yes, if you remove the pump part you will need a Terminal. You can choose between this articles:

12965 Alphacool GPU Terminal - Acetal

Dieses Ersatzteil ist mit verschiedenen Alphacool GPU-Kühlern kompatibel. Es ersetzt das Originalbauteil ohne zusätzliche Funktionen oder Leistungssteigerungen. Eine detaillierte Auflistung der kompatiblen sowie nicht kompatiblen...

shop.alphacool.com

12987 Alphacool GPU Terminal flat straight - Acetal

Eisblock GPX Aurora Terminal mit geraden Anschlussmöglichkeiten. Alternative verwendbar zu den senkrechten Anschlussterminals der Eisblock Aurora Kühler.

shop.alphacool.com

13763 Alphacool GPU 180° Terminal

Dieses Upgrade für die Alphacool Eisblock GPU Kühler-Serie bietet flexible Anschlussmöglichkeiten. Es positioniert die Anschlüsse über der Backplate

shop.alphacool.com

And you will need more tubes and fittings. Because.... Flow from GPU -> radiator -> Reservoir with pump -> back to GPU.
For example:
2x https://shop.alphacool.com/shop/ans...f-anschraubtuelle-tpv-12-7/7-6mm-gerade-black
Tube: https://shop.alphacool.com/shop/sch...-tpv-12-7/7-6-black-matte-3-3m-10ft-retailbox

And 1L liquid.

And this is very helpfull for filling, so you can start the pump over your PSU without starting the PC:

13335 Alphacool Core ATX 24-Pin Überbrückungsstecker

Mit diesem Stecker lassen sich PC-Netzteile auch ohne Mainboard ganz einfach starten.

shop.alphacool.com

 

[MellowsNL]

Just to update, i've taken my gpu and waterblock out of the pc and disconnected the 12v gpu power cable and then powered on the pc and carefully moved the gpu around so i could see the air bubbles leaving the waterblock. This seems to have worked for now and it's been quiet ever since.

Yes, if you remove the pump part you will need a Terminal. You can choose between this articles:

Ah of course, that makes sense. Thanks for the recommendations.
About a reservoir with pump, do you have a recommendation there? one is that strong enough to prevent or at least limit this from happening again.

 

[Eddy]

About a reservoir with pump, do you have a recommendation there?

Not really, take what you want. I would only go with the Apex D5 pump not a DDC version. Any reservoir with a pump included is fine. I personally prefere the normal tube reservoirs. But depends on you.

 

[MellowsNL]

Not really, take what you want. I would only go with the Apex D5 pump not a DDC version. Any reservoir with a pump included is fine. I personally prefere the normal tube reservoirs. But depends on you.

Alright, i'll keep that in mind!

For now the problem seems to be temporarily solved at least, so i'll have a look around and see what kind of things i'll need if i do decide to upgrade to something better (i think i do).

Thanks for your help and effort!

edit:
Nope, the annoying noise came back. Time to upgrade i suppose!

 

[Eddy]

Nope, the annoying noise came back. Time to upgrade i suppose!

Ah... shit... sorry for that. Maybe there is really too much air inside. But if you are going to upbrade everything, not worth to care too much for it now in my opinion.