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Thunderbolt-1 vs Thunderbolt-2 vs Thunderbolt-3-Difference between Thunderbolt-1,Thunderbolt-2,Thunderbolt-3

This page compares Thunderbolt-1 vs Thunderbolt-2 vs Thunderbolt-3 and mentions difference between Thunderbolt-1, Thunderbolt-2 and Thunderbolt-3.

The term "Thurderbolt" is basically hardware interface which allows connection of external peripherals with computer or laptop. As thunderbolt supports daisy chain, upto 6 devices can be connected simultaneously to have communication between them.

It supports maximum cable of length about 3 meteres i.e. 10 ft using copper wire. It supports upto 60 meters (i.e. 200 ft) with optical fiber cable. It is developed by Intel. It combines features of both PCI express and display port. It provides max. voltage of 18V and max. current of 550mA and max. power of 9.9 W.

Thunderbolt technology

Other than providing higher speed of data transfer, it (Thunderbolt-3) allows to connect two 4K 60 Hz displays. It can source/sink power of 100 Watt maximum. Moreover Thunderbolt-3 can be interfaced easily with USB 3.1 Gen.2 type C connector. This allows great amount of flexibility and mobility.

Specifications/Features Thunderbolt-1 Thunderbolt-2 Thunderbolt-3
Connector type Mini display port Mini display port USB Type-C
Number of pins 20 20 24
Bit Rate 10 Gbps per channel, 20 Gbps total 20 channels each supports 1 Gbps, 20 Gbps total 40 Gbps
Protocol compliance 4 x PCI express 2.0; display port 1.1a 4 x PCI express 2.0; display port 1.2 4 x PCI express 3.0; display port 1.2; HDMI 2.0; USB 3.1 GEN-2


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