Just ran some tests, and the performance is really impressive on my i5-9600k, especially knowing the GPU draws just about 10w : 5 streams from 4k HDR 60 MBit/s to 20 Mbit/s 1080p with HDR to SDR Tonemapping and Audio Transcoding, and still room for more on the Server (but not on my test laptop)... As expected, PGS subtitles will drain CPU fast, and using them, I cannot just watch a single transcode with good stability.... But things are improving !