Differences in Product Attributes between USB 3.1 Type A and USB 3.0 Type A

USB 3.1 Type A Product Attributes
1. Interface type:
Standard Type A interface (flat rectangular design), backward compatible with USB 2.0/3.0 Type A devices.
2. Transmission rate:
USB 3.1 Gen 1:5 Gbps (same as USB 3.0).
USB 3.1 Gen 2:10 Gbps (maximum upgrade, theoretical speed doubled).
3. Power supply capacity:
The default output current is increased to 900mA (900mA for USB 3.0, but higher power negotiation is supported for USB 3.1 Gen 2).
◦ Supports USB PD (Power Delivery) protocol (optional) and can provide up to 100W power supply (device support required).
4. Data encoding method:
USB 3.1 Gen 2 uses 128 b/132 b encoding (with an efficiency improvement of~97%, while USB 3.0 uses 8b/10b encoding, with an efficiency of only 80%).
5. Compatibility:
Fully compatible with USB 3.0/2.0 devices, but slows down to 5 Gbps when connected to USB 3.0 devices.
6. Protocol support:
Supports new features under the USB 3.1 specification, such as higher bandwidth allocation and improved power management.
Main differences from USB 3.0 Type A
characteristic
USB 3.1 Type A
USB 3.0 Type A
Maximum speed Gen 1: 5 Gbps; Gen 2: 10 Gbps 5 Gbps (i.e. USB 3.1 Gen 1)
Encoding efficiency Gen 2: 1280/132b (97%) 8b/10b (80%)
Power supply capability optional supports USB PD (higher power) fixed 900mA, no PD support
Protocol version USB 3.1 specification USB 3.0 specification (later classified as 3.1 Gen 1)
Practical application scenarios include high-speed external storage, 4K video transmission, ordinary peripherals, and traditional hard drives