What is the speed of Thunderbolt 2?

Thunderbolt 2 operates at a speed of 20 Gbps (gigabits per second). This technology, developed by Intel, combines PCI Express and DisplayPort into a single connection, allowing for fast data transfer rates that can support various peripherals. The ability to daisy chain multiple devices while maintaining this speed is one of its key features.

While it's important to note the speeds of Thunderbolt 1, which is 10 Gbps, and Thunderbolt 3, which reaches speeds of 40 Gbps, Thunderbolt 2 specifically established a significant upgrade from the first version by doubling the throughput to 20 Gbps, making it an important transition in high-speed data connectivity.