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USB Cabling Question
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Mac Elite
Join Date: Nov 2003
Location: Rockville, MD
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Is it possible to physically distinguish a USB 2.0 cable from a USB 1.1 cable by visual comparison?
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Admin Emeritus  Join Date: Oct 1999
Location: Zurich, Switzerland
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Well, a USB 2 cable will have the USB 2 High Speed logo on it in place of the regular one.
That said, I don't actually believe there's any difference whatsoever in the cables.
tooki
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Mac Elite
Join Date: Nov 2003
Location: Rockville, MD
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Originally posted by tooki:
Well, a USB 2 cable will have the USB 2 High Speed logo on it in place of the regular one.
Well, comparing the logos on what I believe to be a USB 2.0 cable to another cable I think is USB 1.1, I can't see any difference.
If I can't tell the cables apart physically, could I test them in actual usage and somehow determine the maximum speed of each? If one of them reaches 12Mbps, I'll know it's USB 2.0, won't I?
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Addicted to MacNN
Join Date: Jan 2003
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Originally posted by selowitch:
Well, comparing the logos on what I believe to be a USB 2.0 cable to another cable I think is USB 1.1, I can't see any difference.
If I can't tell the cables apart physically, could I test them in actual usage and somehow determine the maximum speed of each? If one of them reaches 12Mbps, I'll know it's USB 2.0, won't I?
USB 2.0's max speed is 480Mbps. 12Mbps is actually USB 1.1's max speed.
With that said, I agree with Tooki - I do not believe there is any difference between "1.1" cables and "2.0" cables. They are interchangeable.
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Mac Elite
Join Date: Nov 2003
Location: Rockville, MD
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Originally posted by Cadaver:
USB 2.0's max speed is 480Mbps. 12Mbps is actually USB 1.1's max speed.
Duh. You're correct, of course. Silly me.
With that said, I agree with Tooki - I do not believe there is any difference between "1.1" cables and "2.0" cables. They are interchangeable.
What accounts for the remarkable difference in maximum speed? Is it the ports, the motherboard, or the firmware?
(Last edited by selowitch; Jan 9, 2005 at 11:20 PM.
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Admin Emeritus Join Date: Oct 1999
Location: Zurich, Switzerland
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It's the USB controller.
tooki
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