Better, stronger, faster. And backward compatible, too!
The USB4 specification is coming soon, and with it, we'll see a few changes that should make our connected lives simpler. While the official spec isn't due to be released until mid-2019, we do know plenty about what we will see when it arrives. Let's have a look at what the changes will be and how they might make a difference.
Faster data speeds
One of the key points of the new USB4 specification is "two-lane operation using existing USB Type-C cables and up to 40 Gbps operation over 40 Gbps certified cables." You may have seen companies advertising "SuperSpeed USB" data transfer rates before, but for now, those are all limited to the USB3 specifications and top out at 20 Gbps (Gigabits per second). 40 Gbps is double the current fastest speeds.
This is accomplished by using two data channels (that's the two-lane reference) on one cable and port. The USB firmware on the devices you are connecting will be able to split the data you are transferring into two individual streams on the device sending it and put it all back together into a stream of data that the device receiving it can read correctly.
Note that this only applies if all the pieces of the chain — both devices, cables and any hubs in the middle — are USB4 compliant. And those cables will need to be USB-C cables, so this will hasten the death of the old-style USB-A interface.
Better ways to handle data
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