The next phase in the PC revolution is the USB (Universal Serial Bus) 3.0 version. It has arrived in the market with companies like Seagate and Western Digital offering hard drives with USB 3.0 speed support. Promising data transfer 10 times faster than the predecessors. Few of the best features includes, it’s support for backward compatibility. USB 3.0 will have dedicated lines going in and out, however, so that communications between host and device can happen at the same time.
The other major improvement is in the data-transfer rate, which will be close to 5 gigabits per second (Gbps) in each direction (officially targeting 4.7 Gbps), compared with the 480 megabits per second (Mbps), one-way, that USB 2.0 offers. The symbol for USB 3.0 will be a blue line on the port.
Compare USB 2.0 to USB 3.0 features, review
| SuperSpeed USB 3.0 | USB 2.0 | |
| Signaling | Dual-simplex four wire differential signaling | Half-duplex two wire differential signaling |
| Data Flows | Simultaneous bi-directional data flow | Unidirectional data flow + negotiated directional bus transitions |
| Cables | 6 Total 4 x SuperSpeed 2 x non-SuperSpeed |
2 x low,full,high-speed |
| Traffic Flow | Asynchronous | Polled |
| Packet Traffic | Explicitly routed | Broadcast to all devices |
| Power Management | Multi-level which supports idle, sleep, and suspend. |
Port-level that has two levels of entry/exit latency |
| Bus Power | 50% more than USB 2.0 80% more with configured power |
watch the video here http://www.youtube.com/watch?v=EP-qRkLoH4g
More information can be gathered from here ==> http://www.usb3.com/