The USB 3.0 Promoter Group announced on 17 November 2008 that version 3.0 of the specification had been completed and had made the transition to the USB Implementers Forum (USB-IF), the managing body of USB specifications.This move effectively opened the specification to hardware developers for implementation in future products. The first USB 3.0 consumer products were announced and shipped by Buffalo Technology in November 2009, while the first certified USB 3.0 consumer products were announced 5 January 2010, at the Las Vegas Consumer Electronics Show (CES), including two motherboards by ASUS and Gigabyte Technology Manufacturers of USB 3.0 host controllers include, but are not limited to, Renesas/NEC Electronics, Fresco Logic, Asmedia, Etron, VIA Labs and Texas Instruments. As of November 2010, Renesas is the only company to have passed USB-IF certification, although motherboards for Intel's Sandy Bridge processors have been seen with Asmedia and Etron host controllers. On October 28, 2010 Hewlett-Packard released the HP Envy 17 3D featuring a Renesas USB 3.0 Host Controller several months before some of their competitors. AMD is working with Renesas to add its USB 3.0 implementation into its chipsets for its 2011 platforms. At CES2011 Toshiba unveiled a laptop called "Toshiba Qosmio X500" that included USB 3.0 and Bluetooth 3.0, and a new series of Sony VAIO laptops that will include USB 3.0. The new models in the Dell XPS series are to include USB 3.0 There are already a few USB 3.0 devices available. To test them, Techiotaku used a Lenovo ThinkPad W510 with USB 3.0 built in. I tried out a variety of new devices, including the Buffalo DriveStation USB 3.0 HD-HXU3 external hard drive; a StarTech SuperSpeed USB 3.0 to SATA Hard Drive Docking Station in combination with my current Western Digital WD Caviar Blue external drive; and a Seagate BlackArmor PS 110 USB 3.0 Performance Kit, a portable hard drive that includes its software on a USB 3.0 ExpressCard.
What's new in USB 3.0?
Unlike the change from USB 1.0 to USB 2.0, USB 3.0 brings actual physical differences to the connectors. The flat USB Type A plug (that goes into the computer) looks the same, but inside is an extra set of connectors; the edge of the plug is colored blue to indicate that it's USB 3.0.
On the other end of the cable, the Type B plug (that goes into the USB device) actually looks different -- it has an extra set of connectors, so it looks a bit like a USB plug that's been crimped a little ways down one end. There's also a new Micro Type B plug that has all its connectors laid out horizontally.
The USB 3.0 plug has an extra set of connectors.
As a result, you won't be able to fit a USB 3.0 cable into a USB 2.0 device. However, you will be able to plug USB 3.0 devices -- and cables -- into your current computer; you just won't get the speed advantage. (Note: To get the most out of USB 3.0, the cable needs to be less than about 9 feet long, down from the USB 2.0 16-foot limit.)
The reason for the new connector is that the USB 3.0 cable contains nine wires (four more than a USB 2.0 cable); eight carry data and one is used as a ground. Despite the increase in wires, however, the cables should be no thicker than those used by USB 2.0. There will be a big difference in performance, however. USB 2.0 is like a single-lane country road that needs to handle the morning-commute traffic in and out of L.A. There are jams and slowdowns when too much data is going back and forth. With nine wires available, USB 3.0 has an additional two lanes of traffic in each direction to smooth the flow between the computer and the device.
What's new in USB 3.0?
Unlike the change from USB 1.0 to USB 2.0, USB 3.0 brings actual physical differences to the connectors. The flat USB Type A plug (that goes into the computer) looks the same, but inside is an extra set of connectors; the edge of the plug is colored blue to indicate that it's USB 3.0.
On the other end of the cable, the Type B plug (that goes into the USB device) actually looks different -- it has an extra set of connectors, so it looks a bit like a USB plug that's been crimped a little ways down one end. There's also a new Micro Type B plug that has all its connectors laid out horizontally.
The USB 3.0 plug has an extra set of connectors.
As a result, you won't be able to fit a USB 3.0 cable into a USB 2.0 device. However, you will be able to plug USB 3.0 devices -- and cables -- into your current computer; you just won't get the speed advantage. (Note: To get the most out of USB 3.0, the cable needs to be less than about 9 feet long, down from the USB 2.0 16-foot limit.)
The reason for the new connector is that the USB 3.0 cable contains nine wires (four more than a USB 2.0 cable); eight carry data and one is used as a ground. Despite the increase in wires, however, the cables should be no thicker than those used by USB 2.0. There will be a big difference in performance, however. USB 2.0 is like a single-lane country road that needs to handle the morning-commute traffic in and out of L.A. There are jams and slowdowns when too much data is going back and forth. With nine wires available, USB 3.0 has an additional two lanes of traffic in each direction to smooth the flow between the computer and the device.
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2 comments:
USB 2.0 has speed of 480 Mbit/s (60 MB/s)
USB 3.0 has speed of 3.2 Gbit/s (with max speed of 5.0 Gbit/s), or more
its a huge achievement...
The speed is about 10 times fater..
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