Where is USB3.0 faster than USB2.0?
Is USB3.0 faster than USB2.0?
USB2.0 provides ample bandwidth for a wide variety of devices and applications, but with the advent of high-definition video, terabyte (1000GB) storage devices, up to gigabit digital cameras, large-capacity mobile phones, and portable media players, higher bandwidth and transfer speeds are a must. Similarly, the actual USB3.0 did not reach the theoretical value of 4.8GB, but even if it can only reach 50% of the theoretical value, it is close to 10 times that of USB2.0. How did USB3.0 work so fast? The reason why USB3.0 has "overspeed" performance is entirely due to technological improvements.
Compared with the current USB2.0 interface, USB3.0 adds more parallel mode physical buses. Readers can pick up the USB cable next to it and look at the interface section. On the basis of the original 4-wire structure (power, ground, and 2 pairs of data), USB3.0 adds 4 wires for receiving and sending signals. Therefore, there are a total of 8 wires, either inside the cable or on the interface. It is an additional 4 (2 pairs) lines that provide the bandwidth needed for the "overspeed USB" to achieve "overspeed". Obviously, 2(1 pair) lines on USB2.0 are not enough.
In addition, the signal transmission mode is still controlled by the host, but it is changed to asynchronous transmission. USB3.0 uses a two-way data transmission mode, rather than the half-duplex mode of the USB2.0 era. Simply put, data only needs to flow in one direction, simplifying the time consumption associated with waiting. In fact, USB3.0 does not use any advanced technology that we have rarely heard of, but in theory, the bandwidth is increased by 10 times. Therefore, it is more friendly, and once the overspeed USB product comes out, it is easy for more people to receive and make better customized products.
