High VRAM usage on Intel Arc A750

[codayon]

I'm on NixOS 25.11 with latest kernel (v6.19.9). I installed nvtop by adding nvtopPackages.intel (v3.3.2) to systemPackages. I use bspwm + picom instead of a full fledged desktop environment.

If I’m using only one terminal (alacritty) and run nvtop, it uses 0.7Gi. If I open a new Terminal, it uses 1.5Gi (alacritty x 2). If I open alacritty (running nvtop) and (ungoogled) Chromium or Firefox, It uses 1.9Gi. After that, If I play a video using a browser from YouTube on 1080p, it uses 3.5Gi. If I play the same video on 4K on Firefox/mpv(from alacritty) it uses 4Gi on Firefox and N/A on Chromium. So, I also tested playing on 1440p on Chromium and it uses 7Gi.

The values I mentioned aren’t exact but around that range and they fluctuate very much and the unit I used was provided by NVTOP. Now, I want a suggestion on what I can do? Should I boot into Ubuntu, (the only supported distribution by Intel Arc) to check same if thing happens in there?

Reference: Discourse NixOS #76041