before buying a new hardware, you could give the recommended fix a try.
on my laptop with Psacal 1060 GPU the nvidia-driver-assistant gave the same “not supported” output, while I knew that I was on the 580xx driver and everything was working fine until the last december update.
https://forum.manjaro.org/t/nvidia-situation-for-maxwell-and-pascal-gpus/184355/30
I then learned by reading in the forum that the manjaro team has worked on a fork of the assistant to fit it into Manjaro, or to feed it with more device IDs to proper identify and suggest the correct output.
anyway, I made a timeshift snapshot, gave it try, updated nvidia-driver-assistent via pacman and then there was the suggestion for the 575xx. so if you are on the 580xx until now, chances are high that the updated driver assistant will also suggest 575xx for you.
I followed then the steps indicated in the various NVidia Posts, basically removing the old driver and associated utility files for all kernels on board (3 LTS) and forced the install of the 575xx version for all kernels.
since I used pacman -Syu during the process, this resulted in the complete 2026-1-4 update to be pulled and installed, and all dependencies where resolved.
what can I say, it worked out fine…