I use Xmedia Recode and NVenc-X265 (Gforce 1050i) to convert 1080p Videos to a smaller size with great success. Fps between 100 and 200.
When I try 4k-Videos, Xmedia Recode doesn't use the graphic-card, I can see it with GPU-Z and framerates below 3. What's wrong?
Alternatively I tried StaxRip, graphic-card worked, fps 15-20.