What is USB 4 ?

USB 4 is the latest specification or version of USB that’s housed within the USB Type-C cables. It takes over from USB 3.2 and 3.0 and offers either 40 GB/s or 20 GB/s of data transfer speed. Just like Thunderbolt 4, it uses the same Type-C reversible and rounded connector.

A thunderbolt 4 cable can also be called a USB 4 cable but the opposite is not true because not all USB 4 cables are Thunderbolt 4 certified. Being the latest version, USB 4 is more efficient and faster than any other version of USB. It can monitor the bandwidth requirements dynamically for all the connected monitors or displays and allows you to save the remaining bandwidth at the same time for data transfer. It was not possible in any earlier version of USB as they straightforwardly split the bandwidth into two parts for data and display.

Just like Thunderbolt 4, USB 4 can also support PD up to 100W and it also offers backward compatibility with Thunderbolt 3, USB 2.0, USB 3.0, USB 3.1, and USB 3.2. A cable with USB 4 certification must also come with the USB logo along with the number 40 or 20 depending upon the speed (40 GB/s or 20 GB/s) it offers.


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