Question Corsair H150 RGB AIO - Is this normal?

[Consulcast]

I recently built myself a PC (got it built). There are no problems with the temperature. At idle, the CPU sits at 38 degrees. After gaming for a while, I realized that a noise was coming from the AIO pump. It is a Corsair iCUE H150 RGB 360 mm AIO water cooler. It is installed with the radiator on top.

I have tried tilting the PC, it does go away for a short while, but does come back again. I don't hear it while I have headphones on, but I subconsciously look for it I guess.

Is this sound normal or should I be worried? (I recorded it through putting my phone's microphone right next to the pump)

https://voca.ro/1mRUb1qCPEzB

Here's also a video of the sound:

https://streamable.com/x5cgb6

Here are my specs:
MSI B650 Gaming Plus Wifi
AMD Ryzen 7 9700x
Corsair iCUE H150 RGB 360 mm AIO
Corsair Vengeance 32 GB (16x2) DDR5 RAM
NZXT H7 Flow (2024)
Corsair 1000W 80+ Gold Full Modular PSU

 

[In2Photos]

I don't think that sounds normal. I don't have a Corsair AIO though so I can't say for certain. The 2 AIOs I have experience with don't have an audible humming sound while in use. One of them occasionally makes noise as air passes through the lines, but that's it. It almost sounds like the impeller bearings are failing or something. I wonder if the pump is torqued down incorrectly, more on one corner than the others so it is putting stress on the pump? Maybe try reseating the pump, making sure you go in a cross pattern as you tighten each screw, little by little. You'll need to clean the thermal paste and reapply.

 

[Consulcast]

I don't think that sounds normal. I don't have a Corsair AIO though so I can't say for certain. The 2 AIOs I have experience with don't have an audible humming sound while in use. One of them occasionally makes noise as air passes through the lines, but that's it. It almost sounds like the impeller bearings are failing or something. I wonder if the pump is torqued down incorrectly, more on one corner than the others so it is putting stress on the pump? Maybe try reseating the pump, making sure you go in a cross pattern as you tighten each screw, little by little. You'll need to clean the thermal paste and reapply.

Changing from PWM to DC (as it was 3-pin) helped as the pump was running at %100 speed. I also used MSI Center to automatically make fan and pump curves for me. It is a lot quieter now. I've heard that it might be air bubbles, but I don't know. Tried tilting but didn't work.

 

[In2Photos]

Changing from PWM to DC (as it was 3-pin) helped as the pump was running at %100 speed. I also used MSI Center to automatically make fan and pump curves for me. It is a lot quieter now. I've heard that it might be air bubbles, but I don't know. Tried tilting but didn't work.

If you have ever heard a fish tank pump on initial spin up air bubbles in the AIO loop sound just like that. I don't think yours sounds like air bubbles.

 

[Consulcast]

If you have ever heard a fish tank pump on initial spin up air bubbles in the AIO loop sound just like that. I don't think yours sounds like air bubbles.

Well, it has calmed down immensely after I did what I have written. There are no temperature problems (goes down to 38 degrees idle). There are no performance problems in games. I'm gonna let it go for now. If something happens (temperature increase etc) I will take it for an RMA.