The overall performance of the surface There is also a related introduction in. One of the great advantages of Surface over ordinary tablets is that it has a standard USB port, which can connect many devices. What different experiences can this USB port bring to users? This article will test some common USB application scenarios to let you know more intuitively what the USB port of the Surface can do.

The surface has a standard USB port on the right side of the body. Of course, this design is not original. Some Android tablets have built-in standard USB ports before. The Surface can enter the "traditional desktop" to enter the device manager, which is the same as the PC operation. By viewing the properties of the universal bus controller, it is known that this is the USB Host function realized through the Tegra3 chip. However, because the Surface uses the Windows system, the device support may be better than the previous USB Host for tablets.

The I/O module in the lower right corner is the key to providing USB Host support.

Of course, the most common thing we use is to attach a mouse to the surface, and then identify it as a USB input device.

The built-in touchpad is identified as an I2C HID device.

It is also feasible to connect the USB keyboard, but relatively speaking, users may use the original Touch Cover of the Surface more.

The mobile hard disk can be correctly identified by inserting it. It seems that the USB power supply of the surface is sufficient.

In the most "egg pain" test, connect a USB optical drive to the surface. It can be seen that the optical drive can be driven, but the system cannot recognize it. It is estimated that the drive is not perfect.

I believe that users will be more concerned about whether the Surface can access the Internet through the USB network card, which of course is not possible, because the driver for X86 cannot be installed on Windows RT.

Since there is only one USB port on the surface, the expansion ability is not very strong, but we can expand the USB port through the USB Hub. The following is a common situation. When a mouse and a USB stick are connected at the same time, they can be correctly identified.

In order to squeeze the capability of the USB interface of the surface, we also carried out a metamorphosis test. The USB Hub continued to connect to the USB Hub. After the actual measurement, it can support up to 10 USB devices, including U disk, SD card and mobile phone.

Screenshot of resource manager after inserting 10 devices

After a round of trouble, the surface also began to be overwhelmed. After unplugging the USB device, 10 drive letters still existed, and the system touch did not respond.

The author also measured the speed of USB on the surface panel, U disk → Surface.

Surface → USB stick.

The test shows that the USB port speed of the surface is average.

From this small test, we can see that the USB interface of the Surface has a good expansion ability. Although it has only one USB, it can connect multiple USB devices through the USB Hub. With the development of the driver by the hardware manufacturer, we believe that the tablet of the Windows RT system will support more hardware in the future, showing more powerful performance. Of course, there is still room for improvement in the speed of the USB interface.

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