From Nvidia via Videocardz:
Support for Maxwell-, Pascal-, and Volta-based GPUs
The release 580 series will be the last to support GPUs based on the Maxwell, Pascal, and Volta architectures.
Currently, 25.04.1 supports the Nvidia driver 550.142 which were released last December, and do not support the 50xx series of GPUs. While TrueNAS doesn’t use a GPU directly, several apps such as Plex, Emby, Jellyfin, Immich, and ConvertX do support Nvidia GPUs for video transcoding.
Heh… and I just put in my 1080 GPU which was released in 2016 and purchased in 2018 into my TrueNAS server at the end of May. This probably won’t affect the TrueNAS users for at least one year (probably through 26.04).