Usbtype-c is different from usb3.1
First of all, it needs to understand something different from usc-b3.1. Strictly speaking, although usbtype-c is a part of the usb3.1 standard, the usbtype-c specification actually defines the interface style of the connector. In contrast, usb3.1 is a set of transmission standards. In other words, for consumers, usbtype-c can be regarded as the “appearance” of a connector to some extent, and this “appearance” can be embedded with different transmission standards, such as usb3.1, thunderbolt 3, and even USB3.0. Therefore, a usbtype-c with exactly the same appearance may actually have different functions.
For example, a usbtype-c connector with a transmission standard of thunderbolt 3 can transmit files at a synchronous speed of 40Gb per second if it is connected to an external hard disk that supports thunderbolt 3. Since thunderbolt 3 is also downward compatible with usb3.1, this usbtype-c can also be plugged into the external hard disk of usb3.1, but the speed will drop to 10GB per second (the theoretical rate of usb3.1). However, if you plug the thunderbolt 3 external hard disk into a usbtype-c port equipped with usb3.1 transmission standard, you will find that nothing has happened – because the specification does not support it.
One usbtype-c each expressed
Although thunderbolt 3 was released late and not as popular as its previous generations, Intel has also noticed this problem – consumers may not know what the usbtype-c is. In fact, this problem has already happened. Because many manufacturers see the slim and plug-in convenience of usbtype-c, they have changed the USB connector of their products from the most common usbtype-a style, or the microusb-b that will be used on mobile phones to usbtype-c connector, so that there are three transmission specifications of usb3.1, 3.0 or even 2.0 (the rate is 10Gb / s, 5GB / s and 480mbps in order), Not to mention thunderbolt 3.
Although Intel’s method is effective, it inevitably expands the problem to some extent – because Intel’s method is to invent various icons to mark the transmission standard supported by usbtype-c. For example, if a usbtype-c can support thunderbolt 3, it will mark a lightning pattern on the connector. If it supports usb3.1, it will mark “SS” on the connector.
Obviously, usb-if (a non-profit organization responsible for formulating USB standards, but its members are mainly IT giants) hopes to make the usbtype-c interface a global unified port, and even replace the 3.5mm headphone port. If the cost permits, we also hope that the transmission standard of each usbtype-c interface is thunderbolt 3 – because this standard is not only the most powerful (with a two-way synchronization rate of 40Gb / s), but also downward compatible. For users, if they plug in usbtype-c and find that the expected functions do not occur, they have to climb the product specification again to confirm whether the usbtype-c supports the required functions in addition to confirming whether the connection is faulty.
Looking back, what standard does the usbtype-c on the 12 inch MacBook support? The answer is USB3.0 with a transmission rate of 5GB / s. It is worth mentioning that today’s usbtype-c on mobile phones mainly uses USB2.0.