Question Strange sound in my desktop PC when boots

Oct 9, 2024
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Hi,

My PC randomly makes this sound when boots. Not every time, just randomly. Initially I thought it was a fan with problems, but it's not the case (with the case open I disconnected the cables of each fan, except for the built in with the case, but the noise is not from there). So, I have no idea what it is. In addition to be random, after a while of the PC being working it disappears, but it's quite annoying and would like to eliminate it.

I have Windows 10, 2 SSD's (Crucial and Samsung), 1 HDD (Samsung), a Seasonic Focus+ Gold PSU, AMD FX-6300 CPU, MSI Gaming 970 MoBo and a GPU Nvidia GeForce GTX 750 Ti.

Video link:
https://app.box.com/s/sknjs7t7td0gwmngki5107av0btrdzfs

What do you think it is?

Many thanks.