What is the difference between USB 3.1 and USB 3.0?
What is the difference between USB 3.1 and USB 3.0?
From the test results, the actual performance of the USB 3.1 interface is much higher than USB 3.0, with continuous read and write speeds of 500MB / s to 600MB / s or so, the highest score can even break 700MB / s. And USB 3.0 interface, its continuous read and write rate is about 300MB / s to 400MB / s or so.
Although USB 3.1 nominal interface theoretical rate is 10Gbps, it also retains part of the bandwidth to support other functions, so its actual effective bandwidth of about 7.2Gbps, the theoretical transmission speed should be able to reach 900MB / s, so that the current USB 3.1 interface has a lot of room for improvement, at least 800MB / s level should be reached.
USB 3.1 is now the focus of discussion, USB 3.1 is the latest USB specification, which was initiated by Intel and other major companies. Data transfer speeds can be increased up to speeds of 10 Gbps. compared to USB 3.0 technology, the new USB technology uses a more efficient data encoding system and provides more than double the effective data throughput rate. It is fully backward compatible with existing USB connectors and cables. USB 3.1 products are also coming into the limelight, especially for motherboards that provide extended interfaces for traditional host-side devices. While Intel will still not provide native USB3.1 support in the next generation of 100 series chipsets, just like USB3.0 before there was a native solution, the new interface is provided by integrating a third-party host chip.
The USB3.1 standard was released in July 2013, doubling the maximum theoretical bandwidth to 10Gb/s (Super Speed+) compared to USB3.0. USB3.1 encoding was replaced with 128b/132b from the previous USB3.0's 8b/10b, with the bandwidth loss rate dropping dramatically from 20% to about 3%, with the same bandwidth after conversion exceeding 1.2GB / s, which also means that in real use USB3.1 limit transfer rate is expected to be close to 1GB / s.
Although like past upgrades, USB 3.1 also brings higher transfer rates and fixes various aspects of the previous problem, people are talking more about the new Type-C interface introduced with USB 3.1. Similar to Apple's Lightning interface, the Type-C interface eliminates the once dull-proof design, so it can be inserted and used normally regardless of the front or back, eliminating the need to identify the direction of insertion.
Another big selling point of USB 3.1 Type-C is the enhanced charging capability of mobile devices. the maximum allowable standard of power supply under the USB 3.1 interface has been significantly increased to 20V/5A (Type-A/B only), which can provide up to 100W of power output capability. The maximum standard for Type-C is 12V/3A, and the 36W charging capacity is sufficient for some thin and light notebooks, which is an important reason why the New MacBook dares to abandon MagSafe and use Type-C as the charging interface. Functionally USB 3.1 Type-C also introduces a new Alternate Mode (alternate mode), which means the Type-C interface and data cable can transmit non-USB data signals. USB 3.1 and USB 3.0 transfer speed comparison
Although there is still no native USB3.1 support, compared to the native USB3.0, the highest access speed of third-party USB3.1 solutions can still be higher than the native USB 3.0 up to 60%, and the overall performance does not disappoint us.
