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USB 3.2, released in September 2017, [35] preserves existing USB 3.1 SuperSpeed and SuperSpeedPlus architectures and protocols and their respective operation modes, but introduces two additional SuperSpeedPlus operation modes (USB 3.2 Gen 1×2 and USB 3.2 Gen 2×2) with the new USB-C Fabric with signaling rates of 10 and 20 Gbit/s (raw data ...
Under the USB 3.2 specification, released 22 September 2017, [11] existing SuperSpeed certified USB-C 3.1 Gen 1 cables will be able to operate at 10 Gbit/s (up from 5 Gbit/s), and SuperSpeed+ certified USB-C 3.1 Gen 2 cables will be able to operate at 20 Gbit/s (up from 10 Gbit/s). The increase in bandwidth is a result of multi-lane operation ...
The USB 3.x family has had the same technical notation retroactively added in the USB 3.1 and USB 3.2 specification versions. Though this shows common principles and the same generations refer to the same nominal speeds, "Gen A" does not have the same exact meaning in both USB 3.x and USB4 specifications.
SuperSpeed+ (SS+) uses increased signaling rate (Gen 2×1 mode) and/or the additional lane in the Type-C connector (Gen 1×2 and Gen 2×2 mode). A USB connection is always between a host or hub at the A connector end, and a device or hub's upstream port at the other end.
[31]: §4.9 Full-Featured USB Type-C devices are a mechanic prerequisite for multi-lane operation (USB 3.2 Gen 1x2, USB 3.2 Gen 2x2, USB4 2x2, USB4 3x2, USB Gen 4 Asymmetric). [31] USB-C devices support power currents of 1.5 A and 3.0 A over the 5 V power bus in addition to baseline 900 mA.
USB 3.2 SuperSpeed+ (aka USB 3.2 Gen 2×2 USB4 Gen 2×2, USB4 Gen 3×1) [45] 20 Gbit/s: 2.424 GB/s: 2017 Thunderbolt 2: 20 Gbit/s: 2.5 GB/s: 2013 FPGA Mezzanine Card Plus (FMC+) [46] 28 Gbit/s: 3.5 GB/s: 2019 External PCI Express 2.0 ×8: 32 Gbit/s: 4 GB/s: USB4 Gen 3×2 [47] 40 Gbit/s: 4.8 GB/s: 2019 Thunderbolt 3 two links: 40 Gbit/s: 5 GB/s ...