Thunderbolt 5
80 Gbps symmetric / 120 Gbps asymmetric over USB-C.
Thunderbolt 5 (Intel, 2024+) doubles Thunderbolt 4's bandwidth: 80 Gbps symmetric, 120 Gbps with asymmetric "Bandwidth Boost" mode for high-refresh displays. Backward-compatible with TB3/TB4/USB4 over the same USB-C connector. Requires both controller and cable to be TB5-rated; many "USB-C" cables only handle 40 Gbps and silently downgrade.