what is the difference between hdmi 1 and 2?
HDMI 1.4 supports 4K video frame rates up to 30p, while HDMI 2.0 supports 4K video frame rates up to 60p. The HDMI 2.0 standard also allows you to display 4K videos encoded using the Main 10 profile (10 bits of color depth with 4:2:0 chroma sampling) and HDR.