htop has GPU usage too, it's just not at the top by default.

are you sure about that? how? I could not find the magic button to show gpu yet.

Press F2 to go to setup, then go to "Meters" on the left. Under "Available Meters" you should see "GPU usage", which can be added to the status meters at the top. Available options for format are "Bar", "Text", "Graph", and "LED".

I'm using 3.4.1, so it's possible you have an older version that doesn't have it.

Seems to only be "Current GPU utilization", as far as I can tell.

btop in contrast, currently shows me: GPU utilization (graph/historic+current), clock speed, power-state, power usage, encoding/decoding utilization, VRAM frequency, VRAM bandwidth utilization (graph+current) + VRAM total/free usage and finally the current transmit/receive rate to/from VRAM.

Yeah, it's not as detailed for sure. You can set it to show a graph of GPU utilization over the last minute or so, but that's about it.

ubuntu 24.04 had version 1.3.0, not there yet.