USB 3.0 actually refers to the original SuperSpeed USB standard, which defined a theoretical transfer speed of 5 Gbps. However, after USB 3.0, the USB Implementers Forum (USB-IF) introduced several subsequent versions of the standard, including USB 3.1 and USB 3.2, all of which were based on improvements to the original USB 3.0 technology. This article will analyze these standards.USB 3.01. Transfer Speed: Theoretically up to 5 Gbps.2, Power Delivery Capacity: Provides up to 4.5W power output (900mA at 5V).3, Physical interface: Typ-A or Typ-B interface, usually identified in blue, has 9 pins to support higher data rates.
1, Transfer Speed:
Gen 1: Equivalent to USB 3.0, that is, 5 Gbps.
Gen 2: The theoretical maximum transfer rate is 10 Gbps.
2, Power Delivery Capacity: Also provides up to 4.5W of basic power supply, but when using Type-C interfaces, it can provide up to 100W of power through the Power Delivery protocol.
3, Physical interfaces: Type-C interfaces are beginning to become popular, support positive inverted unplugging, and can carry higher currents.
1. Transfer Speed:
USB 3.2 Gen 1: Continue to maintain 5 Gbps speeds.
USB 3.2 Gen 2: 10Gbps。
USB 3.2 Gen 2x2: Leveraging dual-channel technology, up to 20 Gbps.
2. Power Delivery Capacity: Up to 100W Power Delivery is also supported via Type-C interface.
3. Physical interfaces: The Type-C interface is mainly promoted because only this type of interface can fully utilize its dual-channel architecture to achieve maximum speed.
4. Comparative Analysis
1. Transfer efficiency: USB 3.2 Gen 2x2 is theoretically the fastest, but actual performance depends on the quality of the device and cable.
2. Compatibility: All of these standards are backward compatible with older versions of USB, which means you can plug USB 3.0 devices into USB 3.1 or 3.2 ports, although speeds will be limited by the minimum common standard.
3. Physical Design: Over time, Type-C interfaces have become increasingly common, especially in laptops and other portable devices, because they are smaller, thinner, and support bidirectional insertion.