Playing UHD movie files

Hi…I have a selection of UHD 4K movies stored on my PC’s hard drive.
The files play perfectly using VLC media player, however, when using PLEX to play these movies it is continuously buffering and makes them unwatchable.
I assume it’s not a PC hardware problem as I have no problems when using VLC
Any suggestions to solve this?
Thanks

The server dashboard should provide some input on the playback situation. What information is showing in the “now playing” tile for that playback on the Plex server dashboard?
Specifically:

  • are the streams listed as local, remote or indirect?
  • are the individual tracks direct playing/streaming or transcoded (with or without hw-acceleration)?

Exemplary screenshot from the "now playing" section
https://support.plex.tv/articles/200871837-status-and-dashboard/

It is of utmost importance to know what kind of “Plex player” you are referring to.
There are currently 3 different supported Plex players running on Windows computers.
Which one are you using?

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