any way to use USB 3 external HDD on the new imac ?

Discussion in 'iMac' started by bo-waleed, Jul 3, 2011.

  1. bo-waleed macrumors 6502

    Joined:
    Oct 15, 2009
    #1
    is it possible to make thunderbolt to USB 3 adaptor ? (or USB 3 hub)
     
  2. Hellhammer Moderator

    Hellhammer

    Staff Member

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    Dec 10, 2008
    Location:
    Finland
    #2
    USB 3.0 is backwards compatible so you can use it in one of the USB 2.0 ports. However, you will be limited to USB 2.0 speeds.

    Currently there are no Thunderbolt to USB 3.0 adapters.
     
  3. bo-waleed thread starter macrumors 6502

    Joined:
    Oct 15, 2009
    #3
    really ? i didn't know about this.

    so no worry if i buy usb 3.0 external HDD now ?

    is it possible ? and will it be in usb 3.0 speed ?
     
  4. steelrod macrumors newbie

    Joined:
    Dec 29, 2007
    #4
    been useing ext usb 3 for a few months now and i c no problem so far,

    usb 3 ext hd doesnt req an ext powersupply as the input on the ext drive is configured differently, well mine is anyway
     
  5. Hellhammer Moderator

    Hellhammer

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    #5
    Not at all, it will work fine.

    Considering that Thunderbolt is basically just external PCIe and DisplayPort, it is. TB provides up to 10Gb/s which should be more than fine for USB 3.0 but the actual speed will most likely depend on the USB 3.0 controller.

    2.5" HDs usually get their power from USB (even USB 2.0).
     
  6. RichardBeer macrumors regular

    RichardBeer

    Joined:
    Jul 11, 2009
    Location:
    England
    #6
    It would be backwards compatible at 2.0 speeds like HellHammer said, however I don't think you need a 3.0 drive unless you are planning on using the drive with 3.0 equipped machines.

    As of now, it looks as if Apple is backing Thunderbolt exclusively, so it doesn't look like a USB 3.0 drive will be too useful in the future for mac users.
     
  7. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #7
    Last time I checked, USB 3.0 external cost like $10 more than USB 2.0 one so it's not a big extra. TB to USB 3.0 adapter will sooner than later come out and it would allow OP to run it at USB 3.0 speeds. Intel will integrate USB 3.0 into their 7-series chipsets which are due next year and it's likely that Macs will get USB 3.0 then.
     

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