The most questions customers will ask is that: in the market, there are USB hubs with 2 ports, 4 ports, 7 ports, or even 10 ports. Making people are really confused: The more ports the better? Should I buy the 10 ports at a higher cost?
Answer: No!
Take an ordinary USB passive hub as an example, aka Unpowered USB Hub. What’s an unpowered USB Hub? Literally, a passive USB hub is a hub that does not require a power supply, it draws power directly from computer connection, there are also powered USB hubs, aka active USB hub, it draws power from the electrical power supply, the more clear comparison can check our last article.
Unlike powered USB hubs, unpowered USB hubs draw power directly from the computer. Here comes the point, A typical computer draws 500 mA. For example, if you buy a 4-port unpowered USB hub, the 4 ports can only receive a maximum of 500mA.
After all, people rarely pay attention to the power consumption of each device.
So I’ll say it more clearly.
The unpowered USB hub you bought has 4 USB ports for connecting a keyboard and mouse, for example, 100mA for the mouse and 400mA for the keyboard, which equals a total operating current of 500mA. Fully complies with the 500mA requirement of passive USB hubs, but if you still want to connect a USB flash drive to transfer data, the entire connection setup may crash!
Because the keyboard and mouse have consumed the total working current of the computer 500mA. If you want the device to work normally, you must unplug a device, such as a keyboard, so that there will be excess current for the U disk to use.
It’s pretty shitty, right?.
Therefore, it is not that the more interfaces, the better, and generally speaking, the more USB ports, the higher the price, but you have not achieved what you want by paying more! Pure waste of money!
