![]() ![]() If the device is capable of backing down to USB2, and if signal quality is even worse, then the device will drop to USB2 speeds (not all devices with USB3 can operate at USB2, e.g., some stereo cameras must run at their rated speed).Īt times an entire HUB will back down to a lower speed if any device is not the full speed spec and if the HUB is cheap enough to not have a "Transaction Translator" ("TT"). 2 HUB (matching specs with no need to alter speeds), if the signal quality is insufficient, then both device and HUB will back down to USB3.1 gen. 2 HUB, then the HUB will slow to USB3.1 gen. In the reverse, if you plug a USB3.1 gen. If a device at the end node can't operate at the speed of the next HUB up the line, then the HUB backs off in speed rather than rejecting the device. USB is a tree structure as it enumerates. Later, what was called USB3.0 was absorbed into USB3.1 standards as gen. Later on, USB3.1 came out with the 10Gb/s spec. ![]() FYI, originally the 5Gb/s was only called USB3.0. ![]()
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