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Thread: USB 2.0 Lead?

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    USB 2.0 Lead?

    Hi,

    If I have a USB2.0 device but am connecting it to my PC with an old lead (which I have had for some time), will the data transfer be at USB1.1 speed or USB2.0 speed?

    i.e. Must I buy USB2.0 leads for all USB2.0 devices?

    I recently saw a Belkin offering for a USB2.0 lead hence am now worried that my hardware may be operating at a lower speed.

    Thanks,

    m.q.

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    Re: USB 2.0 Lead?

    Until your computer interface has been upgraded to 2.0 you will ONLY see the Version 1.0 speed and no 2.0 enhancements.

    Now running HP Pavilion a6528p, with Win7 64 Bit OS.

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    Re: USB 2.0 Lead?

    Would you be able to tell the difference?

    I don't know what data transfer rate my allegedly 10 Mbps Ethernet LAN connection is giving me, but I bet it isn't anywhere near 1.2 MB/s!

    Similarly, I would expect very few people could say what their maximum data rate was on a true USB 2.0 system as opposed to a USB 1.1 system.

    With regard to the cables, I suspect the difference is that you pay more for the USB 2 versions ... <img src=/S/sarcasm.gif border=0 alt=sarcasm width=15 height=15>

    Might be worth looking at some FAQs.
    <font face="Script MT Bold"><font color=blue><big><big>John</big></big></font color=blue></font face=script>

    Ita, esto, quidcumque...

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    Re: USB 2.0 Lead?

    If you are talking about connectors, when using the term "leads" I do NOT think there is any difference. All Version 2.0 devices should be backward compatible to run on a version 1.1 interface, just slower.

    I have seen the newer USB 2 CD burners will burn real fast with a version 2 interface, but are slower that <img src=/w3timages/censored.gif alt=censored border=0> when running on a version 1.1 interface.

    Now running HP Pavilion a6528p, with Win7 64 Bit OS.

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    Re: USB 2.0 Lead?

    Now I'm getting curious. The question posed is, "Can you use an older usb "lead" (cable) to connect a usb 2.0 device to a usb 2.0 port and get usb 2.0 speeds?" While I suspect the answer is yes (there's no obvious difference in the cable other than the loud proclamation on the packaging that it's USB 2.0!!!!) I'm afraid I don't know the answer for sure, and haven't seen the question (as I read it anyway) answered directly. Anyone?

    kip

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    Re: USB 2.0 Lead?

    I recently added the Adaptec USB2connection 4000 card.

    Works with either USB 1.1 or USB 2 devices.

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    Re: USB 2.0 Lead?

    Yes, the speed difference is very significant, especially with external hard drives.

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    Re: USB 2.0 Lead?

    Thanks folks, so in a nutshell USB2 devices DO WORK, but they will work at a SLOWER rate.

    m.q.

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    Re: USB 2.0 Lead?

    I think you need to find a different nutshell!

    My conclusions would be that:

    * you can probably use USB 1.1 cables/connectors and USB 2.0 cables/connectors interchangeably

    * any USB 1.1 DEVICE on a USB 2.0 bus will slow transfer down to the USB 1.1 data transfer speed

    * you will get USB 2.0 data transfer speeds ONLY if all devices (including the hub/card/interface) on the bus are USB 2.0
    <font face="Script MT Bold"><font color=blue><big><big>John</big></big></font color=blue></font face=script>

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    Re: USB 2.0 Lead?

    If the USB device is a hard drive, you really should get a USB 2 adapter card.
    The performance difference is huge.

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    Re: USB 2.0 Lead?

    My motherboard's USB port is USB2.0, but I am using an old cable with the USB2 device.
    So I guess the best thing is to ensure all USB2 hardware is used with the cable which the manufacturer provides.
    Or one which is certified USB2.

    Thanks people.

    m.q.

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    Re: USB 2.0 Lead?

    There is NO difference in the cables, only the devices, as stated above.

    Now running HP Pavilion a6528p, with Win7 64 Bit OS.

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    Re: USB 2.0 Lead?

    Dave, thanks for the definitive answer, but I have to ask: when you say "above", did you mean to look to the heavens? Certainly this is the first definitive answer to the question as to whether there is a difference in the cable (lead). It IS confusing, as usb cables are marketed as USB 2.0!!!! Also a little confusing is the question posted, as musab did not make clear that he indeed did have a usb 2.0 capable motherboard (which he did later, ahem, above)

    thanks for the info,
    kip

    ps I have a usb 2.0 scanner (Visioneer 9020) and a usb 2.0 card and it ROCKS!!!

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    Re: USB 2.0 Lead?

    John, I think that your last conclusion is incorrect. The card &hub must be 2.0. Any Hi-speed USB 2.0 device (480 MB/s) will get high transfer rates. Any other device will get lower transfer rates. Having one slower device on a hub will NOT slow down the whole hub. See http://www.usb.org for lots of detail.

    Joe
    Joe

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    Re: USB 2.0 Lead?

    Joe - you are undoubtedly correct... I should have read the FAQs I pointed at earlier rather more carefully!
    <font face="Script MT Bold"><font color=blue><big><big>John</big></big></font color=blue></font face=script>

    Ita, esto, quidcumque...

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