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Why is the same USB interface three times faster? Jul 23, 2018

The interface between our computers and mobile phones has been around for a long time. Our USB interface has been used for a long time, and the USB interface on our general computer has also been upgraded for a period of time, upgrading from the original 1.0 standard. Up to now the USB3.2 standard even to today's USB Type-C interface, there are too many things to say here, of course, there are inevitably many inductive waiting for us.

To prevent being induced, we need to first understand the USB interface of various specifications. So far, our USB interface standard has undergone many generations of development from USB1.0 to the current USB3.2. At present, we commonly use the USB2.0-USB3.1Gen2 standard interface. It can be said that USB3.0 starts, and our USB data interface has ushered in a great development.

When our USB interface comes up with the 3.0 standard, the blue interface allows the new interface to be separated from the previous interface at first glance, but although the USB 3.0 standard has been released for ten years, so far we are not all on our computers. USB interface is USB3.0 standard, not to mention USB3.1 Gen2 or even USB3.2 standard (USB3.2 standard must be carried by Type-C interface, but it does not mean that Type-C interface can be called USB 3.2) Interface.

One thing we need to pay attention to here is that not all blue interfaces have 10Gbps, USB3.0 is very mixed, and not all Type-C interfaces are USB3.2 standards. Since the implementation of the USB 3.0 standard, there has been a very chaotic scene, and chaos is the reason for the success of the business routine.

The most famous event in the standard chaotic routine is that when the early Apple Macbook was released, it claimed that its USB Type-C interface is the standard of USB3.1. As a result, we found that the speed of this interface is not 10Gbps of the USB 3.1 standard. Only 5Gbps. As a result, in the official logo, this is USB 3.1 Gen1, which is actually the incarnation of USB 3.0.

These vendors are really going to play. Since Apple has done this, everyone is doing this. USB 3.1 is good and consumers like it. As a result, many consumers did not notice that this USB 3.1 Gen1 and USB3.0 are no different.

Then the USB-IF organization in order to standardize the standard (I always feel that this is convenient for manufacturers to better flicker), now the USB-IF organization's specification has no USB 3.0, and replaced with USB 3.1 Gen1, 10Gbps is USB 3.1 Gen2.

There are a lot of USB flash drives and data cables in the market, such as USB 3.1, and you are not told whether it is Gen1 or Gen2. So how do we tell if this USB 3.1 product is USB 3.0 incarnation or true USB 3.1 Gen2? There are two main methods: watching speed, a USB 3.1 Gen2 standard specification U disk continuous reading speed should exceed 500MB / s; look at the price, the current mainstream price of the market on the market USB 3.1 Gen1 is 350 yuan / 128GB, if it is the Gen2 standard, the price doubles normally.

To give an example: When you want to transfer a 5GB movie file to a mobile storage device, in a USB 3.1 Gen1, it takes 10s in theory, and if you use USB 3.1 Gen2, you only need 4.13s. In theory, USB3 .1 is more than doubled.

In fact, because the impact of other factors such as storage of particles will not reach this speed, but we must know that the USB interface can be used not only to connect storage devices, but then we need to understand the emergence of a new interface - USB Type -C interface, the result of the emergence of this USB Type-C interface has led us to face more chaotic choices, more and more business routines.

We can still distinguish them according to various standards. As a result, the appearance of USB Type-C completely makes us more chaotic, because the Thunderbolt3 transmission protocol is installed on the USB Type-C interface, so many people have the impression that USB Type- C stands for high speed interface. But in fact, USB Type-C is just an interface, it can carry a variety of transmission protocols, even if you like it can be used only to carry USB1.0 (transmission speed is only 192KB / s) transmission protocol.

At the beginning, USB3.0, USB 3.1 Gen1, USB 3.1 Gen2 are all blue Type A interfaces, and the other end interface is to see the needs of the connected devices. Since the introduction of the USB Type-C interface, the entire market has become more chaotic.

The USB Type-C was originally born for USB 3.2 (transmission rate 20Gbps), and the USB Type-C is required to connect to the USB 3.2 standard. Because the advantages of multi-touch are valued by the Thunderbolt transmission protocol, the Thunderbolt3 transmission protocol (40Gbps) can be mounted on the USB Type-C interface, which also creates the symbol of the USB Type-C high-speed and high-speed.

However, some mobile phones and PC manufacturers use USB Type-A at the other end to use USB Type-C to use the Type-C interface to achieve faster transfer rate and charging speed, and then imply that their mobile PC products are used. USB Type-C can get these BUFF bonuses, and many consumers don't understand these routines.

So to remind everyone, there is not a USB Type-C interface is not a Thunderbolt3 high-speed interface, we still have to pay attention when buying products. We all know that Thunderbolt interface is twice as fast as the simple USB Type-C interface, and can also transmit video signals, even the charging speed is much higher, so you should pay attention to the USB Type-C interface. There is no Thunderbolt lightning bolt, and what type of USB flash drives on the market recently need to be carefully screened, although the Type-C interface is used, but the speed is very slow. The same USB interface can have several times the speed difference. Especially those who use Type-A to type-C and use Type-C to promote their U-disk ultra-high speed, need to be vigilant.