Buzzing noise coming from Corsair h115i Platinum Pump

[AdamWest]

Hi, I've just bought a new custom built gaming PC with the Corsair h115i Platinum cooling system and I realized that it's making a buzzing noise that comes from the pump.
I'm pretty sure it's the pump because the noise comes from the motherboard around the CPU area and If I'm not mistaken CPU's don't make any noise.

It's like an electric noise and I just can hear it when I open my case side panel window and put my ear close to it. I don't think that it's coil whine as it sounds very different and it's strange but it seems that when the PC is under load the noise stops or it is nearly imperceptible.

Here's a video of the noise, it seems a lot louder in this video than in reality. I wonder if its something to worry about as the PC seems to work properly ,the temps are fine and as I said I can't hear it from the outside. If it's something to worry about I will claim the warranty to the shop that sold it to me.

Here' the video: https://drive.google.com/file/d/1--P...w?usp=drivesdk

Any help would be appreciated, thanks!

[c-attack]

It seems like an electric noise because it is an electric pump. The "hum" is not something you can get rid of with a small electric motor turning 2000-3000 times per minute. If you have to open the door and put your ear near to hear it, then that is about right. More problematic when you can hear it over the fans, case closed, and from your seated position.