USB 3 Transfer Speed Calculator
Here’s a table summarizing key information about USB 3.0 transfer speeds, specifications, and related features:
| Feature | USB 3.0 | USB 3.1 | USB 3.2 | USB4 |
|---|---|---|---|---|
| Transfer Speed | Up to 5 Gbps (SuperSpeed) | Up to 10 Gbps (SuperSpeed+) | Up to 20 Gbps | Up to 40 Gbps |
| Connector Type | Type-A, Type-B | Type-A, Type-B, Type-C | Type-C | Type-C |
| Power Delivery | 4.5W (5V @ 900mA) | 15W (5V @ 3A) | 100W (20V @ 5A) | 100W (20V @ 5A) |
| Data Protocols | Bulk, Isochronous, Control | Bulk, Isochronous, Control | Bulk, Isochronous, Control | Bulk, Isochronous, Control |
| Compatibility | Backward compatible with USB 2.0 | Backward compatible with USB 3.0 | Backward compatible with USB 3.0 and 3.1 | Backward compatible with USB 3.x and Thunderbolt 3 |
| Maximum Cable Length | 3 meters (10 ft) | 2 meters (6.6 ft) | 2 meters (6.6 ft) | 2 meters (6.6 ft) |
| Introduced | 2008 | 2013 | 2017 | 2019 |
| Other Features | Improved power management | Improved data transfer rates | Multi-lane operation (2x lanes) | Universal connection with Thunderbolt 3 compatibility |
Notes:
- Transfer Speed: The maximum theoretical speed; actual speeds may vary based on devices and cables used.
- Power Delivery: Higher wattage allows for faster charging of connected devices.
- Compatibility: USB 3.x versions maintain backward compatibility with USB 2.0.
- Cable Length: The maximum length recommended for optimal performance; longer cables may result in decreased speed.