In this world of technology, USB 2.0 has been the most common and easiest way to connect different types of devices to computer. Nowadays keyboard and mouse also comes with usb type cable. We can't imagine our life with the easiest plug-n-play USB storage devices, cameras, printers, mobile phones and other devices.
USB 2.0 is normally sufficient for daily tasks, but its limit are now starting to be noticed in this high-tech age of HD videos, bulk of digital photos, gigabyte or all over terabyte hard disks. The bit rate offered by USB 2.0 is not much but maximum of 480 Mb/s.
In September 2007, Intel announced the good news that it was beginning to define the specification of USB 3.0 and now at long last successor is ready. But it will take a long time for USB 3.0 ports to show up of devices, especially on motherboards and may be to longer for that devices to become available in the market, but the technology is proven to be ready and working.
FEATURES:
The most excellent and up order feature of USB 3.0 is an huge increase in the potential data transfer rate, in fact , USB 3.0 offers the transfer speed up to 5Gb/s of data(i.e. approximately 640 MB/s ) which is when compared to 480 Mb/s in USB 2.0 is tenfold times in USB 3.0. In this way the USB 3.0 gets the better of its predecessors and also leaps ahead e-SATA and SATA ports, which currently manage up to 300 MB/s.
USB 3.0 & USB 2.0
USB 3.0 can perform highly much better than USB 2.0, particularly in the cases of data transmission speeds and power supply
As this is important to know that, USB 2.0 supports three different speed levels, mainly for backwards compatibility: “Low speed" works at 1.5 Mb/s whereas "Full speed" and "High speed" manage 12 Mb/s and 480Mb/s respectively. But the knowing fact is that USB 3.0 also supports these speeds level so that the USB 2.0 devices do not sense any difference.
THE AMOUNT YOU CAN COPY IN A FIXED SPAN OF TIME:
The most highly fascinating difference between both USB’s is apparent with the amount of data that can be transferred in a two minutes.
The number of PHOTOS that can be transferred in a fixed time (here in two minutes),
The number of SONGS that can be transferred in a fixed time (here in two minutes),
The number of DVD FILMS that can be transferred in a fixed time (here in two minutes),
In the contrary to the initial announcement, USB 3.0 does not require fiber optics cables to achieve such a high transfer speed. The “high-speed" mode operates with the help of the five additional pins in the connector input. moreover, the frequency of transmission, which is in the much high gigahertz range, requires the use of two additional shielded twisted pairs of wires in the cable , the one cable for the transmission of data and the other one is for the reception of that data. The only advantage of such complex-cable structure is support for full-duplex data transmission, i.e. it can able to flow in both directions without compromising with the
The connector: different for different devices
The USB type A connector has much plenty of space for the five orange color additional pins, such that its outside look and shape can be retained without any changes. But the slightly differ in the look of USB 3.0 connector is blue in color which distinguish it from USB 2.0 connectors, which are usually black, grey or white in color. The type B connector generally used for hard drives or printers is slightly larger in height to space for the new pins. The micro USB connector is designed for cell phones or digital cameras is unfortunately too small for the new additional pins, and needs an extension to connect them.
Uploads and downloads are run on different (separate) path wires:
In USB 3.0, two new lanes are introduced for transferring of data, while the remaining pair is handling for the receiving data. This not only the factor for its super speed for the speed boost, but also allows USB 3.0 to do both work (read and write) at the same time from your devices (pc’s, storage devices and cameras etc). In the old one i.e. USB 2.0, the pair of path wires used for data transferring weren’t for the two works simultaneously for reading and writing, USB 2.0 only could able to handle data in uni-direction. Bi-directional data transfer will be very useful for syncing up information on PDAs and storage backup which is only in USB 3.0.
Looks likes old connector, new from inside:
The new USB 3.0 connector is externally much same as compared to the old USB 2.0 specifications, but internally it no longer has only four pins. The five additional new orange pins has introduced in this for that “high speed” mode: the four early pins maintains backward compatibility with USB 2.0 and are not altered.
Verdict:
With this supersonic speed, USB 3.0 is adopted as fast as USB 2.0 was. Users will not face any difficulties with the launch of USB 3.0 because USB 2.0 PORTS on devices especially on motherboards can be replaced easily in one shot and no backward compatibility issue will arise. Moreover, devices which are run on USB’s will be able to run faster than earlier, especially hard drives.
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