usb 3.0
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USB 3.0
The third generation of the USB interface introduced in 2008. Called "SuperSpeed USB 3.0" (SS USB), it provides a 10x increase from 480 Mbps to 4.8 Gbps and also reduces CPU overhead by no longer...
Dictionary
Definition: USB 3.0
The third generation of the USB interface introduced in 2008. Called "SuperSpeed USB 3.0" (SS USB), it provides a 10x increase from 480 Mbps to 4.8 Gbps and also reduces CPU overhead by no longer continuously polling attached devices. In practice, USB 3.0 devices do not achieve a 1000% speed increase. For example, a USB 3.0 external hard drive may provide only a 50% improvement over its USB 2.0 counterpart, because the drive's latency and circuitry are limiting factors.
Plugs and Sockets Are Different
Although additional pins were added to 3.0, older USB 2.0 plugs insert into 3.0 sockets for backward compatibility. Type A 3.0 plugs can be inserted into 2.0 sockets, but only Type A. That is not the case with Type B 3.0 and Micro-B 3.0 plugs, because they have a larger footprint (see below). See USB.
USB 3.0 Connectors
USB 3.0 Type A plugs can be plugged into USB 2.0 sockets, but the larger Type B and Micro-B plugs will not fit in USB 2.0 sockets. (Images courtesy of Intel Corporation.)
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