HDMI V2.1

Version 2.1
HDMI 2.1 was officially announced by the HDMI Forum on January 4, 2017,[81][82] and was released on November 28, 2017.[123] It adds support for higher resolutions and higher refresh rates, including 4K 120 Hz and 8K 60 Hz. HDMI 2.1 also introduces a new HDMI cable category called Ultra High Speed (referred to as 48G during development), which certifies cables at the new higher speeds that these formats require. Ultra High Speed HDMI cables are backwards compatible with older HDMI devices, and older cables are compatible with new HDMI 2.1 devices, though the full 48 Gbit/s bandwidth is only supported with the new cables.