What is the difference between USB 2.0 and USB 3.0

There is a new standard in the USB world called USB 3.0, in this article we will discuss the difference between USB 2,0 and USB 3.0. Universal Serial Bus or USB, as you all know is the most popular connection standard between devices and a host controller (usually located on a computer). USB has undergone many revisions and the latest USB hardware spec to come out is version 3.0, after version 1 and 2. Everything from your flash drives, mice, keyboard, PDAs, Game Consoles, GPS chargers, cell phone connectors and chargers,  GPS devices and bluetooth head sets all use USB in one form or the other. So lets see whats the differences between the most popular USB 2 and just out USB 3 standard are

Let me begin by saying that USB 3.0 is a major advancement over USB 2.0, far greater in impact than what USB 2 was over USB 1.0 . The biggest difference is the speed at which it can communicate with the computer's host controller and the biggest advantage is that it can maintain a backwards compatibility with USB 1 and 2.0. USB 2 had a maximum speed of 480 Mbps, which was great at that time but now it might not be enough because we now have USB thumb drives that are 64 GB in size, cell phone and PDAs that have a lot of internal storage built in, and even at 480 Mbps a full transfer of data in between devices can take a long time. In comparison to this, USB 3.0 boasts a maximum transfer speed of 4.8 Gbps yes, 4.8 Giga bits per second, almost 10 times faster than USB 2.0. Even with realistic numbers you can transfer data between your computer to a 64 Gigabyte thumb drive to full capacity in under 20 minutes!

Faster speed is not the only difference, power usage and requirements for USB 3 devices are much "greener". The USB 3 devices will provide more power when needed to the device to achieve a maximum throughput and conserve power when the device is connected but is idling. Modern operating systems such as Windows 7 already has support built in for USB 3.0 and Mother Board manufacturers already have the USB 3 port built in on the upcoming motherboards. The USB 3 port on a motherboard is characterised by a blue color (see the two images below showing USB 2 and USB 3 ports).

USB 3 in comparison to USB 2 can communicate its latency potential to the host which results in a better transfer performance, better asynchronous transfers are also going to improve communication between devices. The better transfer rates allow high bandwidth intensive devices and applications such as Hi Def Video streaming, Digital Video recorders etc a perfect candidate for USB 3.0. In comparison to other technologies, USB 3 leaves eSATA as well as Bluetooth protocols far behind in terms of speed and performance. Although there are not many USB 3 devices out there yet, but it will clearly become the standard in this new year 2010. Major operating systems vendors have already incorporated and embraced the standard, the good thing is the backward compatibility will not let your existing USB 2 devices go obsolete for another few years

Data Transfer time

Your data transfer time for USB 3.0 is out by a factor of 10 times slower than actual. See: http://www.calctool.org/CALC/prof/computing/transfer_time Thanks for ecxzellent article oterwise.

The data conversion rate factor is correct

Thanks for your comment. The data conversion rate factor between USB 2 and 3 does differ by a factor of 10 as originally stated in this article. Rather than getting into actual math, I would explain in simple steps:

1. Go to google and type convert 4.8 Gbps to Mbps (Google does conversions for you, no need to go to online calculatores, Google is handy right in your toolbar :) )

2. From above calculation you can see 4.8 Gbps = 4,915.2 Mbps.

3. Now open the calculator on your computer, and do 4195.2 / 480 and you will get 10.23 which means 4915.2 is 10 times 480, hence whats stated in the article above is correct

Sorry Guys

Hey sorry if this has been described already, but will usb 3.0 be able to be used in usb 2.0 apple computer ports?

Yes, USB 3 is backwards

Yes, USB 3 is backwards compatible with USB 2, considering Apple follows standards, if an Apple machine has USB 3 ports, you should be able to plug in any USB 2 device on those ports and make it work. Does that answer your question ?

Re: Sorry Guys

I have a 2TB Seagate Hard Drive w/ a USB 3.0 plug, I run windows 7 but i know that on the hard drive it has the install software for both windows and Apple, so i'm sure it works just the same.

The software is probably for

The software is probably for things like "backup utility program" or similar things. Your Seagate USB drive should not need any drivers or software to talk to Windows Seven. Windows 7 automatically detects USB 3 capable external drives like Seagate and makes them available to you through My Computer or Windows Explorer

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WHAT THE H YOU SAY

I just wanted too know if my mouse 2.0 will work in my new 3.0 xps 8700.