Solved! Pulse Noise, from new Asus ultrabook (SSD only) Video attached

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Jan 13, 2019
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I bought the new Asus Zenbook UX433 ultrabook.

After few days of operation, I noticed it started to make these strange pulse noised, in a sporadic way. sometimes it would be heard every 30-40 seconds, and sometimes not heard at all:

https://imgur.com/gallery/TuiODlx

(turn up the sound and hear it towards second 00:03 of the video)

I was hoping this issue wasn't on the whole series, so I returned the notebook and received a new one as replacement. It took just one day and the noise came back on the new device too.

This is not a coil whine. the sound is a pulse, or some sort of basketball drop.
It sure isn't from the speakers (I disabled the sound to be sure, also I connected to external speakers). It has only SSD, no HDD.

Any idea what is causing it, and whether there is a fix? how's it possible I'm having this issue second time in a row, but didn't read about it on any review so far?
 
May 1, 2019
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This sound is from the fan, i disassembly the laptop , it's start and stop. Are you having problems with the sound?? sometimes i hear like if the cpu are Used at 100% like slow motion, and i need to restart to solve the problema.
 
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