How to select the Type-C data line?

I bought a low-profile GTX version of the millet Pro notebook, and once took a mobile hard disk to test the transmission rate. Result The transmission rate of USB Type-A data line (about 300MB/S) with hard disk is nearly 10 times that of the USB Type-C (about 30MB/S) data line with millet. What happened? Millet's own data line can support 90W fast-charging data line ah, the so-called omnipotent told Type-C why would be hanged by Type-A port, With the deepening of the research, it is gradually found that the problem lies in the seemingly ordinary data line. Today, it will share my knowledge with you to help you cut more accurately in the future.

1. Why talk about Type-C

Type-C, full name USB Type-C, is a type of USB interface. Common types of USB interface are Type-A, Type-B, Micro-B and so on, as shown in the figure (image source Baidu experience):

Interface Type-Source: Baidu Experience

Today we are talking about the interface type Type-C which has been widely used in the mobile phone industry. Because of its small size and the advantages of positive and negative interpolation, we can connect laptops to high-performance graphics cards in the future by conforming to certain standard Type-C data lines. We can use Type-C data lines to replace HDMI and VGA wires to connect monitors and so on. You will see more and more in electronic devices. Type-C interface, so the most likely data line to be purchased in the future is the data line of Type-C interface.

2. Two Functions of Data Line

Data line has two main functions: one is data transmission; the other is power transmission. The two functions of data line have nothing to do with the various types mentioned above.

Knowledge Point 1: The type of interface does not determine the charging and data transmission capability.

Data transmission: USB is a bus architecture developed by Intel. Its standard has experienced USB 1.0, USB 1.1, USB 2.0, USB 3.0, USB 3.1 and so on. Among them, the transmission rate supported by USB2.0 is 480 Mbps, the transmission rate supported by USB3.0 is 5.0 Gbps, and the transmission rate supported by USB3.1 is 10.0 Gbps. Note that Mbps is not equal to MB/S, and its relationship is 1 Mbps = 0.125 MB/S. That is to say, the transmission rate of USB 2.0 can theoretically reach 60MB/S, and that of USB 3.1 can theoretically reach 1.25GB/S. It is precisely because USB 3.1 has suchan amazing transmission speed, because it is most likely or has slowly become the transmission standard in the future.