It is a Lenovo Legion R9000K which I think was only available in China but I think it pretty much the same as Lenovo Legion 7 which was released at least half a year later.
I am already at the stage that I don't know the specs anymore, so I am just reading what I can find
- AMD Ryzen 9 5900HX with Radeon Graphics 3.30 GHz
- 64 GB ram
- NVIDIA GeForce RTX 3080 Laptop GPU
- Other stuff
It is built like an oversized vacuum cleaner head but it looks cool. One side of the base is open with two fans that such air in, the air is then blown out the sides. I am impressed that it is often silent but frequently it will sound like a vacuum cleaner but a lot quieter, really. It is an annoying noise because it is high pitch that doesn't always blend in with other sounds. That is how it sounds, as for how loud then I'd say it is like a vacuum cleaner thorough a door at the worst but there are three settings (that you cycle through with shift-Q): quiet, auto and performance. The quiet setting mostly kills the noise, even when working the GPU, but it is not completely quiet. I live in a quiet place now but before I lived in a place that needed a constant AC running for me to stay alive and that device is louder than the laptop. The noise from the laptop will also disappear in a large enough room or a coffee shop. Basically when it comes to sound it is complicated.
I have no idea what the dB would be, I think it is a useless measure unless you actually have device to measure it. In my experience the dB level in a room is often dominated by one device like an AC or a refrigerator, but even moderate rain can outweigh anything that is in the room and rain makes pleasant sound while many artificial devices make unpleasant sounds.
Basically, if the main concern is noise and performance then I'd really recommend a desktop tower instead and you can put it under the table. If the main concerns include the possibility of taking the computer somewhere, then that is what laptops are for.