The door was presented in September 2007 USB 3.0 is an evolution of the USB 2.0introduced in 2000. These are two versions of the Universal Serial Bus data transfer standard.
La 2.0 USB port achieves a transfer rate of 480 Megabits per second on a one-way channel, While the 3.0 USB port reaches a speed of 4800 MegaBytes per second, (i.e. 600 MB per second) with bidirectional transfer and it's ten times higher than the USB 2.0 port.
USB 2.0 has had a great diffusion thanks to the many devices with 2.0 interface, such as keys, external hdd, mobile phones and has replaced the USB 1.1 ports becoming forty times more efficient. Devices with 2.0 interface are backwards compatible even at the USB 1.0 and 1.1 ports, of course the data exchange will be at the lowest interface speed, in this case 1.0 or 1.1.
Devices with a 3.0 interface, on the other hand, they are backward compatible only to 2.0 ports, so ports 1.0 and 1.1 will never detect 3.0 devices and vice versa. Furthermore, the standard USB 3.0 connector is the same as the 2.0 one with the only difference being the internal blue tab that characterizes it.
Both USB 2.0 and 3.0 provide the passage of current to power and recharge the devices and although USB 2.0 is an outdated standard, it is still very popular even today in the latest generation of laptops, to ensure backward compatibility with older devices.
To learn more about the topic, we recommend that you take a look at these articles:
- Tips to have a USB key always at the top
- Difference between Mini USB and Micro USB - What is OTG
- What to do when Windows does not recognize the USB stick?
- The USB ports of the pc no longer work? here is the solution
- How to remove the USB key to the message "Unable to disable generic volume device"
Alejandro Crespo Martinez
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The different types of USB 3.0 connectors ❯
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