Can't play 4k movies -- is my hardware strong enough?

[CelianGdfrd]

I'm running Jellyfin on a dedicated server that has Intel Xeon-D 1521 (4c/8t - 2.4 GHz/2.7 GHz), 16 Go ECC 2133 MHz RAM, I have optical fiber, and still, when I want to play a 4k video, htop shows a transcoder at 750% CPÜ usage and the movie buffers every 20 seconds.

I'm not sure what to do. Should I give up on 4k ? Is there a server tweaking I should do ?

Thank you very much by advance !