In the field of laptops, USB type-C interfaces can be divided into two categories: "data type" and "functional type".

Among them, "data-driven" only supports data transmission, and can be further divided into two speeds: 5Gbps and 10Gbps. If you plan to purchase a mobile Solid-state drive with built-in PCIe NVMe protocol SSD now or in the future, you must choose a notebook equipped with a USB type-c interface that supports 10Gbps transmission rate. Only they can experience a transmission speed of more than 900MB/s. In addition, there is also a speed difference in the "functional" USB type-c, which will not be discussed further in the following text.

The USB type-C of some early laptops only supported USB 2.0 transmission speed. USB type-c also has a speed difference between USB 2.0 and USB 3.0 in the mobile field, and USB 3.2 Gen2 in the desktop PC field × The standard is 2 (20Gbps), which is very rare on laptops.

The specifications of the multifunctional USB type-c "functional" USB type-c are quite confusing. It can be divided into "multifunctional" and "fully functional" interfaces, and many consumers think they are the same type of interface, but in reality, they are not.

Multifunctional "refers to supporting video transmission or charging (high power) in addition to data transmission. Among them, the multifunctional A-type USB type-c that supports data transmission and video transmission is common in game books, such as the Rescuer R7000 2020 series. These products have high requirements for charging power. Since the PD protocol's 100W upper limit is "not enough to feed", it is reasonable to abandon the charging function.

However, the Rescue R7000 2021 comes with a "fully functional" USB type-c that can be used for stable charging with its 100W power when not playing games.

The multifunctional B-type USB type-c that supports data transmission and charging is commonly found in lightweight laptops, such as the RedmiBook Pro 2021 series. Users with video output needs can use the HDMI or Thunderbolt on the laptop.

The Xiaomi Notebook Pro 2021 series is quite unique, as they are equipped with both multi-functional A and multi-functional B USB type-cs as a supplement to the lightning interface.

The full-featured USB type-c "full-featured" USB type-c can perform data transmission, DP video transmission and PD protocol charging functions at the same time, and can connect to most Docking station. If a product can be equipped with two full-featured USB type-cs, it is a "choice of conscience".

The full-featured USB type-c can be further developed into the USB 4 (the vest of Thunderbolt 3) and Thunderbolt 4 interfaces. They have a maximum transmission rate of 40Gbps and can be connected to the external desktop graphics card Docking station. They belong to the "emperor" of interfaces. Unfortunately, the Thunderbolt interface is only applicable to the Intel platform, and there is a certain chance that the AMD Raptor platform will popularize USB 4 in the future.

Many people are very concerned about the function of the USB type-C interface, but they are easy to overlook its location. Relatively speaking, the most reasonable location for the fully functional type-c and lightning interface is on the left side of the laptop near the spindle. This position, whether connected to a power cord, video cable, or other peripheral devices, will not affect the operation of the mouse arm.

In addition, many users now prefer to use a Docking station for thin and light notebooks. The type-c cable used for connecting these products to laptops is located on the left side of the Docking station and the cable is short. If the full-featured type-c connector on the laptop is located on the left or right side of the body, the cable of the Docking station may not be accessible.

Source: Computer enthusiasts