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USB 3.0 Gigabit LAN adapter?

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    #2
    Redisle
    Registered Users Posts: 1,849 ✭✭✭Redisle


    This looks to be the same product you linked above only cheaper, your own is ex VAT and shipping too.

    I don't see why it wouldn't be legit? There is some company info on wikipedia.


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    #3
    cruhoortwunk
    Registered Users Posts: 2,355 ✭✭✭cruhoortwunk


    In terms of the difference in throughput between the 2, here's my understanding:
    USB 3.0 4.8 Gbit/sec
    USB 2.0 480 Mbit/sec
    Gigabit 1 Gbit/sec

    Because USB 2 only reaches 480Mbit, gigabit ethernet can't be realised and the conversion is only capable of it's weakest link ie. 480Mbit/sec. With USB 3, the gigabit part is the weaker link, but gigabit can theoretically be realised. Am I right there?


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    #4
    Redisle
    Registered Users Posts: 1,849 ✭✭✭Redisle


    In theory yes you are correct. I'm thinking there is quite a bit of overhead operating a device like this over USB though. USB (at least 2.0) is a polled bus which introduces a bit of a lag when it comes to real time device operation and data transfer.

    The reviews here suggest that this device does not operate anywhere close to gigabit Ethernet speeds.


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    #5
    cruhoortwunk
    Registered Users Posts: 2,355 ✭✭✭cruhoortwunk


    Redisle wrote: »
    The reviews here suggest that this device does not operate anywhere close to gigabit Ethernet speeds.

    One of them is getting 110MB/sec, which is close enough to the theoretical max of 128MB/sec of gigabit, no? Or maybe my calculations are off


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    #6
    Redisle
    Registered Users Posts: 1,849 ✭✭✭Redisle


    Yup 110MB/s is a pretty fantastic throughput. Perhaps the others just didn't setup the drivers correctly.


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    #7
    Snowbat
    Registered Users Posts: 1,064 ✭✭✭Snowbat


    Gigabit is faster than many hard drives. I'd say they're looking at file transfer speeds and they have a machine on one or other end of the link with a drive that can't keep up. iperf is not affected by drive read/write speeds and is a better way to measure.
    http://en.wikipedia.org/wiki/Iperf


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    #8
    cruhoortwunk
    Registered Users Posts: 2,355 ✭✭✭cruhoortwunk


    startech one is down to £30 on amazon.co.uk. Free postage to UK with parcel motel


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