Century IT blog

USB 1.0 vs USB 2.0 vs USB 3.0

October 3rd, 2011

Introducing USB3.0
Since around 2005, USB2.0 has been the dominant standard for connecting external devices such as hard disks, tape drives, digital cameras, memory sticks, wireless cards etc. If you have connected any external device to a computer over the last 7 years, the chances are that you will have used USB2.0

Over the last couple of years, USB 3.0 has begun to emerge. Any newly purchased computer will have USB3.0 ports.

 

The main improvement is transfer speed: USB2.0 has a maximum speed of 480 mbps (megabits per second), whereas USB3.0 is capable of a whopping 5 Gbits/s (5000 mbps), or a 10x speed increase. This means that if it takes an hour to transfer some data to a USB2.0 device, it could take as little as 6 minutes using a USB3.0 device.

 

 

As with previous versions, USB3.0 is fully backwards compatible, therefore any USB2.0 device will work when plugged into USB3.0 ports.

 

 

Another major advantage is that USB3.0 devices will work with USB2.0 ports, though obviously at a decreased transfer speed. Therefore, it will not be necessary to replace computers, or add an expansion card, just to use these new devices.

 

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