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 Post subject: USB 1.0, 2.0, 3.0: are the cables interchangeable?
PostPosted: Thu Apr 22, 2010 7:58 am 
Klamath
Klamath

Joined: Tue Jun 29, 2004 9:37 am
Posts: 291
I'm wondering what makes a USB device USB 1, 2, or 3, besides the actual device and circuitry.

Can I take a USB-2 device and plug in into a USB port using a USB-1 cable and expect the 2.0 transfer rate?

Also, how do I know which ports on my PC are 2.0? I have two in the front and 6 or so in the back.


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 Post subject:
PostPosted: Thu Apr 22, 2010 9:06 am 
Team Member [Top 500]*
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Location: Cleveland, Ohio
Yes, with any high quality cable the cables are all the same. Note I said quality cable if you expect decent transfer rates. The actual pinouts are the same.

Ron


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 Post subject:
PostPosted: Thu Apr 22, 2010 9:13 am 
Java Junkie
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For USB 1 and 2, as Ron says, they are the same. USB 3, however, requires a new cable.

From MaxPC's article:
Quote:
Like the upgrade from USB 1.1 to 2.0, the new 3.0 connectors and cables will be physically and functionally compatible with hardware from the older specs. Of course, you won’t be able to maximize your bandwidth unless you’re using a USB 3.0 cable with Superspeed devices and ports, but at least plugging a 3.0 cable into a 2.0 port won’t blow up your PC. The spec’s compatibility lies in the design of the new connectors. USB 2.0 cables worked off of four lines – a pair for in/out data transfer, one line for power, and the last for grounding. USB 3.0 adds five new lines (the cable is noticeably thicker), but the new contacts sit parallel to the old ones on a different plane, as opposed to being adjacent to them. This means you’ll be able to differentiate between 2.0 and 3.0 cables just by looking at the ends.


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PostPosted: Thu Apr 22, 2010 9:54 am 
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My bad & thanks Jip for pointing that out. :)

Ron


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 Post subject:
PostPosted: Thu Apr 22, 2010 10:16 pm 
Boy in Black
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They are thick! I bought one and the thing is stiff as a board and pretty much like standard coax size. If anyone's ever had an old OCZ PowerStream PSU, it's like their snake-skin PCIe and HDD lines. Not something I picture toting around in a laptop bag, but this is for the desktop. Hope they're not all like this though.


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