Migration Issue? 4k not working well on DS920+

Plex Media Server NAS & Devices
9

May I suggest a test?

I’ve been doing research of my own withe the 4xxx series CPUs.
We have a QNAP HS-435DX in our lab now.

VaapiDriver="i965" in Preferences.xml will select the i965 driver instead of the iHD driver