USB 3 versus USB 2

  redeyenewby 09:20 26 Oct 2011

What is the difference between USB 2 and USB 3? Can a USB 3 BE PLUGGED INTO A usb 2 SLOT?

  Fruit Bat /\0/\ 09:47 26 Oct 2011

USB 3.0 has speeds of up to 5 Gbit/s, 10 times faster than USB2.0 (480 Mbit/s).

"New connectors and cables for higher speed data transfer while maintaining backward USB 2.0 compatibility"

Yes, USB2 devices work in USB3 slots, USB 3 devices can be plugged into USB2 slots but of course will only work at the slower (480Mbits) speed.

  birdface 11:01 26 Oct 2011

Just found out on my computer that I had my USB3 plugged into a usb2 port.

Just looked up my owner manual and it gives 1 USB3 port and the rest are usb2.

So I would think that if the ports are separate there must be a difference.

Needless to say I have now got it plugged into the USB3 port which updated the driver for it when I rebooted.

  redeyenewby 11:10 27 Oct 2011

Thank you Fruit Bat /\O/\ and buteman, I looked up a website which gave me a comprehensive explanation of the difference between the two. To ,odify mu computer to accept USB3 (which is 10 times faster than USB2 would, I understand, be horrendously expensive). My computer, although not ancient, is definitely pre USB3. I learned that USB3 is backward compatible, so it shouldn't be a problem with existting equipment.. The article was fascinating. Aparently USB1.0 USB1.2 have 2 speeds, USB2 has 3 speeds ans USB3 has 4 speeds. Sorry, I hope I;m not teaching my Grabdmother how to suck eggs. Thanks for your information.

  birdface 13:41 27 Oct 2011


I can't see any difference using usb3 rather than usb2,But then again I don't play games or anything like that so I cannot really comment on it.

  Fruit Bat /\0/\ 13:50 27 Oct 2011

If you have PCIexpress slot free a USB3 card is as little as £16

see here

This thread is now locked and can not be replied to.

Elsewhere on IDG sites

Fujitsu Lifebook P727 laptop review

Converse's new logo: the trainer brand looks to its heritage for a fresh identity

Mac power user tips and hidden tricks

Comment lancer Windows 10 en mode sans échec ?