Thunderbolt

October 28, 2025 at 1:39 PM

Official Post

Is Thunderbolt 4 the same as USB-C?

No. USB-C is a physical connector for transmitting data, video and power. Confusion arises because the Thunderbolt and USB standards both use the USB-C connector but have different data, video and power capabilities which you can see in the table later on.

USB-C supporting Thunderbolt

USB-C only

Thunderbolt cable

As you see if your USB-C cable or connection supports Thunderbolt you have a lightning symbol on it.

Comparison table

Info	Thunderbolt 4	Thunderbolt 3	USB4	USB 3.2
Data Transfer	40 Gbps	40 Gbps	20 / 40 Gbps	20 Gbps
Screens	2 x 4K 1 x 8K	2 x 4 k 1 x 5k	2 x 4K 1 x 8K	1 x 4K
Power	100 W	100 W	100 W	100 W
Daisy-chaining	yes max 6 devices	yes max 6 devices	no	no
Cable length	2 m	0,5 m	0,8 m	1 m
Connectivity	USB-C	USB-C	USB-C	USB-C

Thunderbolt Specifications

Version	Connectivity	Screen resolution	Data Rate	Power	Cable Length
Thunderbolt 1	Mini DisplayPort	2560 x 1600	2 x 10 Gbit/s	10 W	3 m
Thunderbolt 2	Mini DisplayPort	4K (single display) 2560 x 1444 (dual display)	20 Gbit/s	10 W	3 m
Thunderbolt 3	USB-C	4K @ 120 Hz (single display) 5K @ 60 Hz (single display) 4K @ 60 Hz (dual display)	40 Gbit/s	100 W	0,5 m if passive 2 m if actif
Thunderbolt 4	USB-C	8K @ 60 Hz (single display) 4K @ 60 Hz (dual display)	40 Gbit/s	100 W	2 m

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Thunderbolt

Is Thunderbolt 4 the same as USB-C?

Comparison table

Thunderbolt Specifications

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