After 3 years effort, Intel finally released USB 3.0 Controller Interface Spec aka xHCI (Extensible Host Controller Interface).
From USB 1.1 with maximum transfer rate of 12Mbits/second to USB 2.0 with maximum transfer rate of 40 Mbits/second. Now USB 3.0 has break the gigabit mark with 4.8Gbit/second. Even faster than firewire 3.2Gbit/s.
| USB 1.1 | 12 Mbits/second |
| USB 2.0 | 40 Mbits/second |
| USB 3.0 | 4.8 Gbits/second |
The performance compare with USB1.0, 2.0 and 3.0 has been demo by WinHEC
Comparison sample for data transfer of 25GB HD movie:
- USB 1.0: 9.3 hours
- USB 2.0: 13.9 minutes
- USB 3.0: 70 seconds
on January 10, 2009 at 1:45 AM
now a days really more and more advance, like UTP cable also same, up to category 7 and category 8, even fiber optic also have a very fast transmission rate
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