Better Resource Allocation for Video, PCIe: In lieu of alternative mode where the other interface takes over the connection, USB 4 devices can use a process called "protocol tunneling" that sends DisplayPort, PCIe and USB packets at the same time while allocating bandwidth accordingly.Compatible with Thunderbolt 3 devices: Some, but not necessarily all USB 4 implementations will also work with Thunderbolt 3 devices.DisplayPort 2.0 can use up to 80 Gbps, which is double the amount available to USB data, because it sends all the data in one direction (to the monitor) and can thus use all eight data lanes at once. DisplayPort 2.0 can support 8K resolution at 60 Hz with HDR10 color. DisplayPort Alt Mode 2.0: USB 4 supports DisplayPort 2.0 over its alternative mode.
The data is transmitted in two sets of four bidirectional lanes.
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