Not sure if this is the CPU, or something in the motherboard, or the integrated GPU, but yes, you can somehow hear activity outside the fan and the rotating dis

Not sure if this is the CPU, or something in the motherboard, or the integrated GPU, but yes, you can somehow hear activity outside the fan and the rotating disks. I clearly hear some quiet clicks when hovering messages or folders in Thunderbird both on my X1 Carbon Gen 9 and my HP Elitebook 640 G6. It's more obvious on the HP. It sounds like a silent HDD writing something, except I don't have HDDs in these computers. Possible related bug: [1] I remember hearing activity on a Pentium II laptop (which had a Silicon Graphics graphics card) and I think on a Pentium II tower with a Voodoo 2 card too, years ago. The noise was quite obvious to me, it was more similar to the Coil Whine noise from a GPU recorded by LTT [2] I hope I'm not cursing you if you hadn't noticed until now. [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1730423 https://bugzilla.mozilla.org/show_bug.cgi?id=1730423 [2] https://www.youtube.com/watch?v=HP73edpQwgc https://www.youtube.com/watch?v=HP73edpQwgc