USB 2 backwards-compatible?

Discussion in 'Mac Help/Tips' started by MarkW19, Jun 26, 2003.

  1. MarkW19 macrumors 65816

    Joined:
    Sep 13, 2002
    Location:
    Surrey, UK
    #1
    Can the USB 2 ports on the G5 accept USB 1/1.1 devices as well?

    If not, is there some sort of converter available?

    -Mark
     
  2. evildead macrumors 65816

    evildead

    Joined:
    Jun 18, 2001
    Location:
    WestCost, USA
    #2
    yes

    USB 2.0 is backward commpatable with all USB 1.0 and 1.1 devices. I have a 5 port USB 2.0 card in my Quicksliver at home.... I don't even have any USB 2.0 devices. I just needed the extra ports
     
  3. kjwebb macrumors regular

    Joined:
    May 19, 2003
    Location:
    Australia
    #3
    Backwards compatiple YES!
    Slower on USB1.1 devices YES!

    Therefore, me hopes Apple will update the keyboard so it's a USB2 hub instead of a USB1.1 hub. Why bother having USB 2 if the keyboard is only usb 1.1?
     
  4. evildead macrumors 65816

    evildead

    Joined:
    Jun 18, 2001
    Location:
    WestCost, USA
    #4
    keybord

    There is no need for a USB 2.0 keybord or mouse. 12mbs/ps is plenty fast for that kind of use.

    however... if youwanted a USB 2.0 hub on the keybord.. that would make sence. Or.. better yet... FireWire
     
  5. patrick0brien macrumors 68040

    patrick0brien

    Joined:
    Oct 24, 2002
    Location:
    The West Loop
    #5
    These are two separate buses. One little issue with USB is the moment you put a 1.1 device on a USB 2 bus, the whole bus will throttle back to the lowest common denominator - the USB 1.1 speed. Much like what happens when you put a WiFi (802.11b) device on a Wireless G (802.1g, AirPort Extreme) network.

    They have probably three busses on these G5's. The 1.1 bus for keyboard and mouse, and 2 USB 2's, thereby solving this issue.

    Just make sure the right devices are plugged in to the right ports :D
     
  6. MarkW19 thread starter macrumors 65816

    Joined:
    Sep 13, 2002
    Location:
    Surrey, UK
    #6
    OK, so if it's slower, does that mean (when plugged into the USB 2 ports) my USB 1/1.1 digital camera, audio interface and ADSL modem won't perform as fast/well?
     
  7. mnkeybsness macrumors 68030

    mnkeybsness

    Joined:
    Jun 25, 2001
    Location:
    Moneyapolis, Minnesota
    #7
    no...what was meant by that is that all of the USB will not perform as well...this can be solved if apple made a separate bus for each port though...which i'm not sure if they did or not.
     

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