Displayport (and HDMI) have a 2 bit ECC overhead for every 8 bits transmitted, so effective bandwidth of DP 1.2 is 17.28 Gbit/s. Additionally, the timing adds a

Displayport (and HDMI) have a 2 bit ECC overhead for every 8 bits transmitted, so effective bandwidth of DP 1.2 is 17.28 Gbit/s. Additionally, the timing adds additional overhead, so the required bandwidth is actually 22.18 Gbit/s for 24bpp 60Hz 5120x2880