What is the difference between USB3.0 cable and USB2.0 cable?
In daily life, the application of USB interface in life is still very extensive. Its USB interface is an external interface of PC, and has become a common interface standard in PC industry. However, with the continuous development and progress of The Times, there are more updated versions of USB cables, such as the 2.0 version and 3.0 version that are commonly used now. So what's the difference between a USB3.0 cable and a USB2.0 cable?
Difference between USB3.0 cable and USB2.0 cable：
1.Backward compatible
As with previous upgrades, the USB3.0 interface is backward compatible with its physical features. In other words, USB2.0 devices, interfaces, and cables can all support the USB3.0 standard and achieve ultra-high speeds.The compatibility of USB3.0 is mainly reflected in the interface design. USB3.0 compatibility is mainly reflected in the interface design. USB2.0 is divided into four wires, two pairs of wires for data input and output, two pairs of wires for the power supply circuit and ground.USB3.0 adds five shock designs to the USB2.0 interface, with the new shock placed side by side behind the four USB2.0 contacts. Users can distinguish the difference between USB3.0 and USB2.0 from the USB interface structure.
2.Speed mentioned effective increase
USB3.0 has a high transfer rate of 4.8Gbps, ten times that of USB2.0. In theory, USB3.0 can transfer 27GB of HD video in the 70S, while switching to USB2.0 takes more than 15 minutes to complete. However, to achieve this efficiency, USB3.0 also needs to be paired with a storage device that can support USB3.0 speeds. In addition, Windows also needs to install a new mass storage device driver that supports the USB3.0 standard.
3.reversible link
USB2.0 input and output terminals do not support simultaneous operation, but among the five lines added to USB3.0, two provide data output, two provide data input, and four lines can achieve two-way transmission at the same time. Bidirectional transmission can greatly improve applications such as synchronizing information or data backup.
4.high efficiency
USB3.0 technology introduced a higher power supply protocol standard, abandoned the device polling mode, changed to interrupt mode. Simply put, when the USB connected in USB2.0 mode is inactive or standby. The USB bus controller still needs to periodically check the status of the data transmitted by the device. After USB3.0 mode, the device can completely disconnect from the USB in the standby state, and if the connection needs to be restored, the interrupt signal will be automatically sent to the controller, and the controller will start to perform data transmission tasks.
5.High power supply capacity
The excellent overall performance of USB3.0 is not only reflected in the higher speed, but also in the power supply ability. At present, there are many electronic products on the market that need to be charged through the USB interface, due to the huge market demand and the increase of high-power electronic products, developers have also improved the power supply capacity of USB3.0, from 100MA to 900MA. This means that USB technology will be mentioned in more products.
The above is the difference between USB3.0 cables and USB2.0 cables. The 3.0 version of the USB cable is obviously more advantageous than the 2.0 version, but in order to ensure the applicability of use, you can choose according to your actual situation.
