remux

Hi all, I'm using a windows 10 machine plugged into my AVR using an HDMI cable. my machine has an i7-9700 cpu and a 1050Ti video card. My .mkv 4k remux movies are stored on a NAS and the speed between the PC and the NAS is 1Gbps. I'm using Plex to watch the movies. When I'm watching a movie...