USB 3.0 for Windows® 7
Features of USB 3.0 and Windows 7 support for USB 3.0
Universal Serial Bus (USB) is used to establish communication between devices and a host controller, like a computer. The invention of USB has made it easy to connect different computer peripherals like mouse, keyboards, printers, personal media players, flash drives etc with the system. USB 1.0 was released in the year 1996, but this had a very less data transfer rate compared to the next version of USB, the USB 2.0, which was released in the year 2000. The speed of USB 2.0 is almost 480Mbps. The third official version of the USB is the USB 3.0. It is also called "SuperSpeed" bus. The USB 3.0 overpowered its previous versions to a greater extent in features like data transfer rate and power management.
Features of USB 3.0 and its compatibility with Windows 7 are discussed in the following points:
- Transfer rate
- Power management
- Availability and support for Windows 7
USB 2.0 has a speed of about 480Mbps. In times of an ever increasing demand for data transfer with high-definition video content, terabyte storage devices, high megapixel count digital cameras, and multi-gigabyte mobile phones and portable media players, 480Mbps is not really fast anymore and USB 3.0 ensures a speed of 4.8 Gbps which is an immense improvement. An additional physical bus is added in parallel with the existing USB 2.0 bus which enables USB 3.0 to achieve the speed.
USB 3.0 is able to change the power use according to the requirement. It can provide 50% more power for suspended devices, and 80% more power for configured devices. Using this feature the more power-hungry devices could be bus powered, and battery powered devices that formerly charged using bus power could potentially charge faster. The USB 3.0 also uses less power when situation demands. It eliminates continuous device polling and broadcast packet transmission.
USB 3.0 silicon like the USB host controllers, peripheral chipsets and hubs compliant with the SuperSpeed bus arrived in 2009. After that a number of external hard drives, flash drives, Blu-ray optical drives, high-end notebooks, and host adapters in both PCI Express and ExpressCard have been released. Microsoft has announced that Windows 7 would have USB 3.0 support, perhaps not in its immediate release, but in a subsequent Service Pack or updates. Windows 7 drivers afor USB 3.0 are also available.
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