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USB 3.0, Help needed :)

  • 25-08-2011 5:00pm
    #1
    Stinicker
    Banned (with Prison Access) Posts: 7,102 ✭✭✭


    I bought this USB 3.0 pci express card on fleabay two weeks ago and installed it today, after I had to wait another week for a molex to floppy drive lead to power the thing as it wasn't supplied :mad: Today I ran a few tests with my USB 3.0 hard-drive and was slightly disappointed.

    I installed it today complete with power lead and am quite disappointed with its speeds, on my USB 2.0 I would get between 25 - 40MB (megabytes) a second up and down depending on whether I was uploading stuff to the drive or copying stuff down.

    With the USB 3.0 card installed I am getting around 60-70MB (Megabyte) a second and there is no real difference between up and download speed, I find the smaller the file the higher the speed, if I drag across a 200MB file it will come across almost instantly but when I began copying across a 10GB video file it started off really fast at around 200MBps and then slowed down after a few seconds to around 62MBps.

    Like there is a good speed improvement of about double my USB 2.0 speed but I am getting nowhere near the gigabytes of speed USB 3.0 is purported to deliver.

    Any ideas?


Comments

  • #2
    D_BEAR
    Registered Users, Registered Users 2 Posts: 278 ✭✭D_BEAR


    Have a usb 3 hard drive and its about 60-80 MB that's about as fast as you'll get unless you get a solid state drive.


  • #3
    Jehuty42
    Closed Accounts Posts: 560 ✭✭✭Jehuty42


    The gigabytes per second speed is only theoretical- in practise you are limited by the read/write times of your hard drive and the external disk. The interface is fast, but you can't get information to and from it at the maximum speed it supports.


  • #4
    Tea_Bag
    Registered Users, Registered Users 2 Posts: 4,983 ✭✭✭Tea_Bag


    USB 2 is rated for 480mbps but as you're well aware you get nowhere near that. your speeds seem fine for USB 3.


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