USB3.0 can be compatible with USB2.0 downwards. Of course, USB2.0 can also be compatible with USB3.0 devices. In fact, to meet USB3.0 transmission, there are no two conditions. First of all, the computer motherboard supports USB3.0, and the other used device must also support USB3.0. Now there are only some new U disks and mobile hard disks to support USB3.0, so if it is Take the USB3.0 device (such as a U disk) to connect to a computer that supports USB3.0 motherboards, then USB3.0 data can be achieved at high speed transmission.

USB3.0 data cable, in fact, 3.0 and 2.0 of USB only refers to the difference in the interface standard transmission rate. The USB3.0 computer refers to the USB interface on the computer motherboard that supports the transmission rate of the 3.0 standard. It can also be compatible with 2.0. In other words, if the computer motherboard interface is USB3.0, we take the previous USB flash drive (the previous U disk only supports USB2.0) and connect to the USB3.0 interface, but the transmission speed is still only the speed of USB2.0. Because even if the motherboard meets the requirements, the U disk does not meet, so it can only reach the transmission speed of USB2.0. Conversely, if you take a USB3.0 U disk and connect to the old computer (using the USB2.0 interface), the transmission speed can still only reach USB2.0, because the motherboard only supports the speed of 2.0.

In general, the current USB3.0 and the USB2.0 interface are actually the same, but the transmission speed is not different. When we go to the USB3.0 and USB2.0 interface on the computer motherboard The size of the two is the same, just the internal color of the USB3.0 is blue, and the internal internal USB2.0 is black, as shown in the figure below:

Comparison of USB2.0 and USB3.0 interfaces For everyone, as long as the USB3.0 is compatible with 2.0, and to meet the high -speed data transmission needs of USB3.0, the computer motherboard must be at the same time. The USB device also supports USB3.0. If any of the single support, it can only reach the speed of USB2.0.

Simple summary:

The USB3.0 device can be inserted on the 2.0 interface, but the transmission speed is 2.0

Of course, the USB2.0 device can be inserted on the 3.0 interface, but the transmission speed is also 2.0

Only USB3.0 devices can be inserted on the 3.0 interface, but the transmission speed is 3.0

When we use the USB2.0 standard device in the USB3.0 interface, even if the device does not support USB3.0 transmission, we can still use the USB3.0 interface. The gap is that it does not support 3.0 high -speed transmission. It can only use 2.0 transmission speed at the speed of 2.0 in the transmission speed at the speed of 2.0 at the speed of 2.0 at the speed of 2.0 at the transmission speed at the speed of 2.0. Transmission in USB3.0.

The above is the full content of USB3.0 compatible 2.0, I hope to help friends in need.