Update just to finalize this topic. ASRock A310 went in with no issue whatsoever.
PRO:
Plex sees it, uses it and now it’s better than Jellyfin as any movie which wouldn’t play with CPU now plays just fine. Very good experience.
CON:
Check BIOS settings for display.
Yesterday I bought online an Asrock A310 for my Jellyfin server… 
It will arrive Monday I guess. I’ll post the result of my test with the card.
I really don’t want to use Plex.
Maybe I am wrong… But it definitely not Plug and Play as in Plex.
I “assume” correct selection is “Intel…” but then you need to select something else
Honestly, I started with intention to use Jellyfin, but tried Plex and it much more polished. I jumped wagon 2 weeks ago before they raised prices and got lifetime license with them…
I assume at this point to get to BIOS I need to connect physical monitor? Because even at boot stage IPMI screen is blank
My Arc A310 card arrived today and I have tested.
I’m pretty sure it’s working with Jellyfin.
At first I didn’t think it was. When I installed the Jellyfin App, there was no GPU resource / selection. But I think they changed that.
When I list the /dev/dri now “render129” shows up in the folder:
In jellyfin configuration, I used Intel QuickSync, and in the field QSV Device I used “/dev/dri/renderD129”.
At first, I was not sure it was working because the CPU was hitting 13% when transcoding (I have setted 2 cores for jellyfin), but I’ve found out it’s probably because of audio transcoding and subtitles rendering, which uses CPU for this.
Now if I change the bitrate of the movie to a low value, in a few seconds the movies starts playing. I’ve tested with a 4K HDR movie. With HW transcode off, the movie takes too long to start, keeps loading all the time.
