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This article mainly introduces what is the speed difference between usb2.0 and 3.0. it is very detailed and has a certain reference value. Interested friends must read it!

Theoretically, the transmission speed of USB1.1 can reach 12Mbps/ seconds, while USB2.0 can reach the speed of 480Mbps/ seconds (60MB/s). USB3.0 is the latest USB specification, which is characterized by very fast transmission rate and a maximum transmission speed of 5.0Gbps/ seconds (500MB/s).

What is USB 2.0?

Theoretically, the transmission speed of USB1.1 can reach 12Mbps/ seconds, while USB2.0 can reach the speed of 480Mbps/ seconds (that is, 60MB/s), and can be backward compatible with USB1.1.

USB2.0 is several times faster than USB1.1, but it needs driver cooperation! The USB port and USB peripherals on the motherboard are required to be usb2.0 in order to achieve the working speed of usb2.0, as long as one is not USB2.0, then work in the state of USB1.1.

What is USB 3.0?

USB 3.0 is the latest USB specification, which is mainly initiated by industry giants such as Intel, Microsoft, Hewlett-Packard, Texas Instruments, NEC, ST-NXP and so on. The transmission rate is very fast, which can reach 5.0Gbps/ seconds (500MB/s) in theory, which is 10 times faster than the current 480Mbps High Speed USB (referred to as USB 2.0). The shape is basically the same as the current USB interface, and is compatible with USB 2.0 and USB 1.1 devices.

Extended data:

The reason for the "speeding" performance of USB 3.0 is entirely due to technological improvements.

Compared with the USB 2.0 interface, USB 3.0 adds more parallel mode physical buses.

You can pick up a USB cable around you and look at the interface section.

On the basis of the original 4-wire structure (power supply, ground wire, 2 data), USB 3.0 adds 4 lines to receive and transmit signals.

So there are a total of 8 lines, both inside the cable and on the interface.

It is the addition of four (2 pairs) of lines that provide support for the bandwidth required by "SuperSpeed USB" to achieve "overspeed".

Obviously, the two (one pair) lines on USB 2.0 are not enough.

In addition, the method of signal transmission is still controlled by the host, but it is changed to asynchronous transmission.

USB 3.0 takes advantage of the two-way data transfer mode instead of the half-duplex mode of the USB 2.0 era. Simply put, the data only needs to flow in one direction, simplifying the time consumption caused by waiting.

In fact, USB 3.0 has not adopted any advanced technology that is rarely heard of, but it has theoretically increased its bandwidth tenfold. As a result, it has more affinity and friendliness. Once SuperSpeed USB products are available, more people can easily accept them and make better customized products.

The above is all the content of this article entitled "what's the difference between usb2.0 and 3.0?" Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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