It’s barely been a day since the official announcement for USB4 Version 2.0 and now it seems the new standard may have even more to offer. USB4 Version 2.0 is already known to support up to 80 Gbps but it appears that a particular configuration could allow for up to 120 Gbps.
However, USB4 v2 also enables an asymmetric 3 Tx + 1 Rx configuration, meaning 120 Gbps out from the host and 40 Gbps back from device to host. This asymmetric setup then allows tunneling of the full DisplayPort UHBR20 rate that takes 80 Gbps of bandwidth out to a monitor while simultaneously supporting 40 Gbps bi-directional USB data transfer rates on top of that. This would meet the requirements of a single cable monitor + docking station solution that could handle 8K144 HDR with Display Stream Compression and no chroma subsampling with an integrated 40 Gbps USB hub at full bandwidth with no contention.
USB Type-C introduced the options for both higher power delivery options and display connectivity via the USB standard and now it seems that USB4 Version 2.0 will continue that path. With DisplayPort 2.0 UHBR displays on the horizon, it’s an exciting prospect that PC users might still be able to rely on single-cable USB solutions for them and other accessories.