In our QNAP QNA-UC5G1T review, we see how this USB 3.1 Type-C to 5Gbase-T 5GbE adapter performs and how it compares to its competition
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QNAP QNA-UC5G1T USB 5GbE Adapter Review appeared first on
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The consumers are confused because the true speed of USB 3.0 is 4 Gb/s, not 5 Gb/s, exactly like the true speed of SATA 3 is 4.8 Gb/s, not 6 Gb/s.
While the Ethernet interfaces have been traditionally described by their speed in data bits per second, the serial interfaces promoted by Intel, i.e. USB, SATA and PCIe have been described by giving their speed in Intel bits per second a.k.a. marketing bits per second, with the purpose of confusing the consumers by making them believe that the products are faster than in reality.
This practice of using for marketing various irrelevant measurement units to provide greater numbers is also well known for a few other computer-related products, e.g. for magnetic tapes where the "compressed" capacity is given, for scanners where the "interpolated" resolution is given or for cameras where "digital" zoom is given instead of the optical zoom.
If the consumers would have been aware that the 5 Gb/s USB is actually 4 Gb/s USB, they would not have been surprised that due to the normal communication overheads the useful speed of the link is a little over 3 Gb/s.
To increase the confusion, the 10 Gb/s USB has actually a speed of (approximately) 10 Gb/s, which is approximately equal to the speed of 10 Gb/s Ethernet.
