this gist contains how to create a module for waybar to monitor nVidia GPUs.

Waybar module for monitoring nVidia GPUs.md

This custom module will require nvidia-smi installed as I have chosen to use it to pull real-time data. For icons to work correctly install nerd-fonts.

In your ~/.config/waybar/Modules you can choose to add these:

• GPU Usage:

"custom/gpu-usage": {
    "format": "{}% {icon}",
    "format-icons": "󰾲",
    "on-click": "nvidia-settings", // will required nvidia-settings installed as well, comes with the driver by default.
    "exec": "nvidia-smi --query-gpu=utilization.gpu --format=csv,noheader,nounits",
    "interval": 1,
},

You may comment out the on-click entry if you do not wish to make it a shortcut to open nvidia-settings.\

• GPU Temperature:

"custom/gpu-temperature": {
    "format": "{}°C {icon}",
    "format-icons": "󰾲",
    "on-click": "kitty --title nvtop sh -c 'nvtop'", // I prefer `nvtop`, install it according to your distro if you want the same
    "exec": "nvidia-smi --query-gpu=temperature.gpu --format=csv,noheader,nounits",
    "interval": 1,
},

nvtop is not required for GPU monitoring, I prefer it over nvidia-smi. There is actually no advantage of doing so.

• GPU Memory:

"custom/gpu-memory": {
    "format": "{} ",
    //"on-click":"", // upto you what you want to add, your preference really
    "exec": "nvidia-smi --query-gpu=memory.used --format=csv,noheader",
    "interval": 1,
    },

Don't forget to add the modules you want to include in your waybar to ~/.config/waybar/config. For example:

"modules-left": [
    //other predefined/user defined modules
    .
    .
    .
    "custom/gpu-temperature",
    .
    .
    .
    //other predefined/user defined modules
    


 ],

You may parse more informations from nvidia-smi, run nvidia-smi --help-query-gpu to get more parameters.

If you use anything other than kitty, write down on-click part accordingly.