The difference between USB 2.0 and USB 3.0

USB is now version 3.0 Overview if we notice almost no difference between USB 2.0 and USB 3.0. Physically they are the same size. A glimpse of what distinguishes one USB 2.0 and USB 3.0 is USB 2.0 has a white cushion while USB 3.0 has a blue pads. Is this just a trick middlemen USB producers that increased their market of people who want to upgrade hardware? Is the USB 2.0 can be connected to a USB 3.0 or vice versa? or perhaps question arises what is the difference between USB 1.0, USB 2.0 and USB 3.0?First of all we equate our perception of USB. USB here is not the Urban Service Boundary, United State Bank, or Unicode Subset bitfields. USB tp which we discuss here is the Universal Serial Bus. The sense USB is a serial bus standard for connecting devices. can computer to mobile devices or other devices such as flash, external HD, modem, and others.In general, USB 3.0 has a higher speed of about 3.2Gbps (400MB / s) and in theory can reach 4.8Gpbs. This speed is 6 to 10 times faster than USB 2.0. because USB 3.0 has adopted a bidirectional data transfer technology (full duplex), so it can read and write simultaneously (simultaneously). Another advantage of USB 3.0 is more power-efficient as the original electric voltage 4V and 4.4V be improved so 150mA current. USB 3.0 can be used 4-6 devices simultaneously. USB 3.0 also supports idle, sleep and suspend making better power management.Devices can be connected using a USB 2.0 to USB 3.0, but a USB 3.0 device can not be connected to USB 2.0. For example we have a USB 2.0 flash drive and we no computer USB 3.0 nah it can be used with the best performance of USB 2.0. But if our flash USB 3.0 turns our computers only available USB 2.0 port, the computer certainly can not detect the flash.

Of excess USB 3.0, still leaves a shortfall. This deficiency which eventually became the advantages of USB 2.0. Shortage of USB 3.0 include:

•      Not supported by Windows XP operating system. But already supported Windows 7 and above and Linux.

•    The maximum cable length of 3 meters, while USB 2.0 can reach 5 meters. (This shortcoming can be addressed by adding a USB Hub.

•      The data transmission rate can not reach the optimal speed on all devices. for example, only limited hard drive disk rotating speed of the disk.

If we dismantle the physical from the cable both USB 2.0 and USB 3.0 both have 4 wires. But in terms of jack USB 2.0 cable plus 4-wire line to USB 3.0. So USB 3.0 has 9 wires