Transmission speed of "usb3.0" and "usb2.0": 1. The theoretical transmission rate of "usb3.0" is 500M per second, which is "5.0Gbps". In practice, it can reach 100M per second ; 2. The theoretical transmission rate of "usb2.0" is 60M per second, which is 480Mbps, but in practice it can reach 30M per second.
The operating environment of this tutorial: Windows 10 system, DELL G3 computer.
The theoretical value of USB3.0 transmission rate is 500MB per second. In actual use, it can reach 100MB per second. The theoretical transmission rate of USB2.0 The value is 60MB per second, and actual applications can reach 30MB per second.
The maximum transmission bandwidth of USB2.0 is 480Mbps (ie 60MB/s), while the maximum transmission bandwidth of USB3.0 is as high as 5.0Gbps (500MB/s). , so the difference in speed is that USB3.0 is faster than USB2.0.
However, everyone should note that this is a theoretical transmission value. If several devices share a USB channel, the main control chip will allocate and control the bandwidth available to each device. For example, in USB1.1, all devices can only share 1.5MB/s bandwidth. If a single device occupies all the bandwidth of the USB interface, it will make it difficult to use other devices.
USB-IF announced the latest USB naming specification. The original USB 3.0 and USB 3.1 will no longer be used. All USB 3.0 standards will be called USB 3.2. Considering compatibility, USB 3.0, USB 3.1 and USB 3.2 are called USB 3.2 Gen 1, USB 3.2 Gen 2, and USB 3.2 Gen 2x2 respectively.
We can also make a simple distinction from the color. Generally, USB2.0 is mostly white or black, while USB3.0 has a blue interface.
The symbols of USB2.0 and 3.O are also different, 3.0 is more like two S.
The pins are also different. USB2.0 has 4 pins, while USB 3.0 uses 9 pins, which has more pins than USB2.0. The USB3.0 interface can be connected to USB2 .0 compatible, but the speed will be slower on the 2.0 interface where the USB3.0 device is plugged into.
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