bandwidth per lane UHBR 13.5 (Ultra High Bit Rate 13.5): 13.5Gbit/s bandwidth per lane UHBR 20 (Ultra High Bit Rate 20): 20.0Gbit/s bandwidth per lane The total bandwidth of the main link in a standard 4-lane connection is the aggregate of all lanes: RBR: 4 × 1.62Gbit/s = 6.48Gbit/s bandwidth (data rate of 5.184Gbit/s or 648MB/s with 8b/10b encoding) HBR: 4 × 2.70Gbit/s = 10.80Gbit/s bandwidth (data rate of 8.64Gbit/s or 1.08GB/s) HBR2: 4 × 5.40Gbit/s = 21.60Gbit/s bandwidth (data rate of 17.28Gbit/s or 2.16GB/s) HBR3: 4 × 8.10Gbit/s = 32.40Gbit/s bandwidth (data rate of 25.92Gbit/s or 3.24GB/s) UHBR 10: 4 × 10.0Gbit/s = 40.00Gbit/s bandwidth (data rate of 38.69Gbit/s or 4.84GB/s with 128b/132b encoding and FEC) UHBR 13.5: 4 × 13.5Gbit/s = 54.00Gbit/s bandwidth (data rate of 52.22Gbit/s or 6.52GB/s) UHBR 20: 4 × 20.0Gbit/s = 80.00Gbit/s bandwidth (data rate of 77.37Gbit/s or 9.69GB/s) The transmission mode used by the DisplayPort main link is negotiated by the source and sink device when a connection is made, through a process called Link Training. This process determines the maximum possible speed of the connection. If the quality of the DisplayPort cable is insufficient to reliably handle HBR2 speeds for example, the DisplayPort devices will detect this and switch down to a lower mode to maintain a stable connection. The link can be re-negotiated at any time if a loss of synchronization is detected. Audio data is transmitted across the main link during the video blanking intervals (short pauses between each line and frame of video data). Auxiliary channel The DisplayPort AUX channel is a half-duplex (bidirectional) data channel used for miscellaneous additional data beyond video and audio, such as EDID (I2C) or CEC commands. This bidirectional data channel is required, since the video lane signals are unidirectional from source to display. AUX signals are transmitted across a dedicated set of twisted-pair wires. DisplayPort1.0 specified Manchester encoding with a 2Mbaud signal rate (1Mbit/s data rate). Version 1.2 of the DisplayPort standard introduced a second transmission mode called FAUX (Fast AUX), which operated at 720Mbaud with 8b/10b encoding (576Mbit/s data rate), but it was deprecated in version 1.3. Cables and connectors Cables Compatibility and feature support All DisplayPort cables are compatible with all DisplayPort devices, regardless of the version of each device or the cable certification level. All features of DisplayPort will function across any DisplayPort cable. DisplayPort does not have multiple cable