![]() ![]() Aside from the four wires already found in USB 2.0 cables, USB 3.0 adds four more which are only necessary when utilizing “Superspeed.” In order to achieve the greater data throughput provided by “Superspeed,” more wires needed to be added. But this is not so good news for laptops which need to supply a greater amount of power. The greater amount of power that can be drawn is a good thing for devices that need slightly more than 500mA as they would no longer need to rely on a separate power cable. USB 3.0 increases the per unit load by 50% to 150mA and the maximum units that can be drawn to 6 resulting in an overall maximum of 800mA. While unconfigured devices can only draw one unit of power, configured devices can draw 5 units for a maximum total of 500mA. USB 2.0 only provides 100mA per unit load of power. In contrast, USB 3.0 multiples that more than five-fold with its “Superspeed” transfer mode achieving 400MB/s or 3.2Gbit/s maximum throughput.Īside from improvements in speed, USB 3.0 also increases the maximum power that can be drawn by devices. USB 2.0 added “Hi-Speed” with a maximum throughput of 480Mbit/s or 60MB/s. The best feature for USB 3.0 is speed, and it is the biggest difference between the two. Let us see the differences between USB 2.0 and USB 3.0. It was in 2008 that USB 3.0 was introduced. While USB 1.0 was released in 1996, USB 2.0 came into existence in 2000. So far there have been three versions of USB. ![]() One striking feature of USB is that it even charges many devices while being connected with a computer. Even Bluetooth headsets and GPS chargers are making use of USB today. All smart phones, video game consoles and PDA’s are making use of USB as a power cord today. Though invented for computers, USB has become so popular that it is being used on virtually every new electronic device being manufactured today. Since its invention, USB has virtually replaced everything that had been earlier used for this purpose. USB stands for Universal Serial Bus and is a device that has transformed the way communication between a computer and other gadgets such as mouse, keyboard, digital cameras, media players etc is established today. USB 2.0 and USB 3.0 are two versions of the USB standard. ![]()
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