USB 3.0 Technology

USB (Universal Serial Bus) is a device standard that must be owned by a computer / laptop can connect to other hardware such as mouse, printer, card reader and others.

USB technology began to be introduced since 1996 with USB version 1.0, then became popular after exiting the USB version 2.0 in early 2001 which has 40 times the speed of USB 1.0 (480 Mbits / s)

USB technology re-emerged with a new version that is USB 3.0 which was introduced in 2010 with the title Super Speed is different from the designation of the High Speed USB 2.0

USB 3.0 Specifications

A number of changes have been implemented in USB 3.0 Increased to satisfy the demands of external devices. Here is a quick overview of the USB technology:


Transfer Rate
This new SuperSpeed ​​Provides realistic interface transfer rates of around 3.200 Mbits / s or 3.2 Gbits / s. The theoretical top signaling rate is at 4.8 Gbits / s.

Data Transfer
USB 3.0 introduces full duplex data transfer. Two of five lanes are reserved for transmitting data, while another pair is dedicated to receiving data, meaning cans That USB 3.0 read and write data simultaneously at full speed. Previous USB specifications did not support bi-directional data transfer.

Power
The unit load has been Increased to 150 mA and a device configured cans draw up to six unit loads, the which adds up to 900 mA. This USB 2.0 exceeds by 80% and leads to faster recharging or powering of More Than Four devices from a single hub. In Addition, the minimum device operating voltage was dropped from 4.4 V to 4 V, the which Saves energy.

Power Management
USB 3.0 device suspends poll, the which is Replaced by an interrupt-driven protocol. As a result, idle devices will not experience a power drain since a signal from the device is required to initiate data transfer. With the USB 2.0 host controller Used to look for active transfers, Slowly draining power. Briefly, USB 3.0 supports idle, sleep, and suspend states, as well as link-, device-, and function-level power management (Wikipedia).

Physical Appearance
The above described specifications are Also represented in the physical appearance of USB 3.0. While the cable was described to be thicker Previously Because it contains more wires Than Four USB 2.0, this appears not to be the case now. The plug, however, is a dead giveaway for USB 3.0. It contains an additional set of connectors,

Compatibility
USB 3.0 is backwards compatible with USB 2.0. So whether you get a new USB 3.0 device or a new computer supports USB 3.0 That, your old devices will from be Able to Communicate with the new interface. Naturally, it will do so at the old USB 2.0 speed. However, you will not be Able to use a USB 3.0 cable connects to a USB 2.0 device.

Transfer Rate
Now I bet all this megabits per second and Gigabit numbers sound impressive, but what does it Actually translate to? Well, let me give you an example. With USB 3.0 Could you transfer a 10 GB file from your computer to an external drive in approximately 25 seconds. Would this USB 2.0 With More Than take five minutes.

Benefits
The devices That will of benefit most from the USB 3.0 are those already outspeed That USB 2.0, Including HD webcams, Blu-Ray drives, external hard drives or Some.

Support by Operating Systems
Windows Vista, Windows 7, and Linux already support USB 3.0. Mac is expected follow. Given its age, Windows XP will of probably not receive an update to support the new interface.

The Bad News

I was tempted to report, That there is' no bad news, but that's not true. Let's say bad news is minimal.

Cable
The maximum length of cable supports USB 3.0 is reduced to approximately three meters, opposed to five meters with USB 2.0. However, using hubs, the maximum length cans be extended to 18 meters.

Speed ​​Limit
Naturally, not all devices will from be Able to make use of the Increased speed in USB 3.0. Magnetic hard drives for example, are limited by Their RPM and the corresponding read / write speeds. Hence, the USB 3.0 will from not unfold its full beauty Until computers are equipped by default with faster hardware, Such as solid state drives. But We all know how speedy progress is in the IT world. Give it a year or two and you will from be Able to fully benefit from USB 3.0.

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