Sonnet TB2 card upgrade results

Discussion in 'Mac Pro' started by dysert, Feb 10, 2014.

  1. dysert macrumors regular

    Joined:
    Sep 4, 2006
    #1
    I have a Sonnet Echo Express III-D Thunderbolt to PCIe Card expansion chassis connected to Bus 2 on my new Mac Pro. There are no other devices on this bus. I purchased it with the Thunderbolt 1 card and received the Thunderbolt 2 card today. I used Black Magic to test the speed of my Samsung EVO 840 1TB SSD installed in the expansion chassis using the Sonnet Tempo SSD Pro. I have attached screen shots of TB1 and TB2 tests. As you can see no difference in performance.
     

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  2. rasputin666 macrumors member

    rasputin666

    Joined:
    Mar 1, 2009
    #2
    so i am a little confused, shouldn't the TB2 be 'twice' as fast? [theoretically]..am i missing something?
     
  3. goMac macrumors 603

    Joined:
    Apr 15, 2004
    #3
    If I'm understanding the poster correctly, he's testing the speed of one installed Samsung SSD.

    The top speed of that SSD is less than the maximum throughput of Thunderbolt 1. Thunderbolt 2 won't change anything. I'm pretty sure he could install up to two of those SSDs without hitting the speed limit of Thunderbolt 1.
     
  4. analog guy macrumors 6502

    Joined:
    Mar 6, 2009
    #4
    my card arrives on tuesday. i'll test with my 2-drive (840 EVO 1TB) RAID0.

    wouldn't expect there to be any difference with one drive. their tempo pro and tempo cards experience no difference -- 1 SSD is nowhere near the max of those cards nor of the TB1 bandwidth limit.

    a 2-drive SSD exceeds the limits of the tempo SSD card (i have both tempo and tempo pro) and comes nearer to the limits of TB1. TB2 could provide a bit more headroom.

    we shall see in a few hours.
     
  5. chfilm macrumors 65816

    chfilm

    Joined:
    Nov 15, 2012
    Location:
    Germany
    #5
    It makes sense, given the speed of the ssd. Tb2 is just relevant if you would daisy chain a 4k display or a faster external storage like the new Lacie little big disk2 through it.
     
  6. analog guy macrumors 6502

    Joined:
    Mar 6, 2009
    #6
  7. theSeb macrumors 604

    theSeb

    Joined:
    Aug 10, 2010
    Location:
    Poole, England
    #7
    Imagine you are driving at the top speed on a straight, empty highway with 3 lanes. Now imagine the highway has 6 lanes empty. Will the car go faster?
     
  8. brand macrumors 601

    brand

    Joined:
    Oct 3, 2006
    Location:
    127.0.0.1
    #8
    Thats a great analogy.
     
  9. rasputin666 macrumors member

    rasputin666

    Joined:
    Mar 1, 2009
    #9
    i agree..follows my rule when i don't get something right away, talk to me like i'm 5.
     

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