Transcoding to RAM requires a pretty intimate understanding of how transcoding works in jellyfin, how big your original source videos are, etc. Not recommended for the faint of heart.
Jellyfin 10.10.1 (Docker)
Ubuntu 24.04 LTS
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
3x WD Red Pro 6TB CMR in RAIDZ1 (JF Library)