We surveyed more than 1000 readers and added our own research findings to the criteria for selecting the best USB hub. A great USB hub must have a USB 3 port, and there should be a dedicated power supply. It requires reliable, practical design, compact, and (for portable hub) light. Each port's LED indicator and a decent warranty are also useful.

The cost of USB 3 hub is often higher than that of USB 2 Center, and the 3 standard has 2.4 GHz interference. However, we chose to focus on the USB 3 hub because the USB 2 standard was old - it was launched in April 2000, and USB 3 made its debut in November 2008, many times slower than 3. For example, our favorite desktop hard disk drive transfers about 150 megabytes per second on the USB 3 connection, but on USB 2, its maxes is only 40 MB- if you think you will always need to insert USB 3 – capable external hard drive or flash drive into the data hub, and you will need USB 3 The extra speed provided by the.0 hub.

Dedicated power supply is necessary for most hubs, but not all. The kind that doesn't need it at a certain time. To explain why, we first need to discuss how power flows through the USB hub. According to official USB 3 specification, each USB 3 port must provide 900 ma current at 5 volts, or 4.5 watts. If your USB 3 hub is powered only by the USB 3 port of the computer (in other words, there is no dedicated power line or adapter), this means that there are four devices in your theory running on the amount of power normally provided to one. Such an arrangement may cause the device to lose power and disconnect from the computer, which may cause damage to the driver and data loss.

However, it is important to recognize that this theoretical setup has great flexibility. The 900 ma current requirement of USB 3 port is a minimum value instead of a fixed level, and manufacturers usually provide more power for their hub ports. The power consumption of the device varies greatly due to the USB type hub and the operation you do at a given time. For example, in the user's manual, Anke provides the following estimates of power consumption according to the device: the mouse consumption is about 100 Ma, the keyboard uses up to 500 mA, and the portable USB 3 hard drive consumes 900 ma.

These are very generous estimates designed to encourage caution in order to avoid overloading your hub by accident. When you first insert them into a hub and transmit data, the device usually gets the maximum power, but rarely draws the maximum theoretical value, especially during the extension period. However, it is a wise idea to use a dedicated power line or adapter, if you don't want to take the risk of careless damage to everything on your hard drive; for a USB hub with more than 4 ports, a dedicated power line or adapter is absolutely necessary. (for a travel friendly four port USB hub, this is not entirely necessary, but the unpowered installer needs to be careful to avoid the greater power of the device to try than the USB 3 port of a portable computer. Here we will discuss this topic in more detail.

In addition to the minimum power, we know from our study of USB chargers that people prefer ports that can recharge mobile phones and tablets faster; an informal Twitter survey of readers confirms this. So we look for a hub for high speed charging ports, a function that requires an external AC power supply, and we end up focusing on the power model in addition to the portable hub.

With these power requirements, we eliminate any USB hub and do not have enough juice to give full play to all its ports. For example, we have seven USB 3 ports and three 2.4 amps charging ports at the top. According to the USB 3 specification, this means that the hub may require up to 47 watts of power to make all its ports in its maximum theoretical upper limit - because it includes a 12 volt, 5 ampere (60 Watt) power, it gets enough electricity, and its all ports are at its maximum upper limit. Many hubs that do not have enough power are not significantly smaller,

lighter or cheaper to make up, so we exclude these models.

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