HDMI Ultra High Speed (2.1)

48 Gbps of certified bandwidth defines the Ultra High Speed HDMI 2.1 cable, the throughput needed for 4K at 120 Hz, 8K at 60 Hz, variable refresh rate, and enhanced audio return over one connector. It is the cable current-generation game consoles assume: the PlayStation 5 and Xbox Series X both output 4K 120 Hz signals that lower-bandwidth HDMI cannot carry. Certification matters because only tested cables reliably reach the full rate; unlabeled cables often fail VRR or drop frames. A 3-meter length covers most console-to-television and PC-to-monitor setups. Next-generation home theater and high-refresh gaming monitors are its core applications. Cables are inexpensive, typically $8 to $25.