HDMI 2.1 Specification Supports Ultra High Speed Bandwidth Up to 48Gbps enabling Higher resolutions and faster refresh rates including 8K60Hz and 4K120Hz and support for resolutions up to 10K120 compressed. The Ultra High Speed HDMI Cable supports 48Gbit/s bandwidth for uncompressed HDMI 2.1 feature support and has very low emissions of Electromagnetic interference (EMI).