The new USB 3.2 tech aims to double that to 20Gbps, or 2GB/sec, by allowing for 10 Gbps per lane. The devices you’re using will have to support the newest USB hardware and come with the modern USB-C connectors. USB-C has long been touted as the universal standard that will save us all, a
single port that can charge your phone, your laptop, your tablet, your Bluetooth speaker, and even your Nintendo console, all through a single common port.
Given that USB 3.2 isn’t expected to be finalized until later this year, it’ll probably still be a while before we see the new standard roll out to devices, and there’s even more news planned for the USB Developer Days event in September 2017.
The Super Speed transaction is initiated by the host making a request followed by a response from the device. The device either accepts the request or rejects it; if accepted, the device sends data or accepts data from the host.
As with earlier versions of USB, USB 3.0 provides power at 5 volts nominal. The available current for low-power Super Speed devices is 150 mA, an increase from the 100 mA defined in USB 2.0. For high-power Super Speed devices, the limit is six unit loads or 900 mA, almost twice USB 2.0’s 500 mA.
A factor affecting the speed of USB storage devices is that the USB Mass Storage Bulk-Only Transfer protocol drivers are generally slower than the USB Attached SCSI protocol drivers.
On some old (2009–2010) Ibex Peak-based motherboards, the built-in USB 3.0 chipsets are connected by default via a 2.5 GT/s PCI Express lane of the PCH, which then did not provide full PCI Express 2.0 speed (5 GT/s), so it did not provide enough bandwidth even for a single USB 3.0 port.
USB 3.2 Gen 2×1 Super Speed+, 10 Gbit/s (1250 MB/s) data rate over 1 lane using 128b/132b encoding, the same as USB 3.1 Gen 2.
USB 3.2 Gen 2×2 Super Speed+, new 20 Gbit/s (2500 MB/s) data rate over 2 lanes using 128b/132b encoding.