Samsung 840 on BlackMagic Speed Test ?

Discussion in 'Mac mini' started by drsox, May 22, 2013.

  1. drsox macrumors 65816

    drsox

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    Apr 29, 2011
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    Xhystos
    #1
    Just tried out my new Samsung 840 on BlackMagic and I get these strange results : Write : 130 MBps. Read : 497 MBps.
    Same test on my MacBook Air is : Write : 175MBps. Read : 200 MBps.

    ?

    Something wrong with my Samsung or with the Mini ?

    What else might I test ?

    Time to send both of them back (still within the return window !) ?
     
  2. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #2
    What capacity does it have? If it is the 120 GB version, then that speed is to be accepted:
    [​IMG]
     
  3. drsox thread starter macrumors 65816

    drsox

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    Apr 29, 2011
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    #3
    Yes, you are right - it is the 120GB version. I'm just surprised that the Write speed should be as low as 130MBps.

    I guess it is within spec after all.

    Thanks
     
  4. dannyp1996 macrumors member

    Joined:
    Apr 15, 2011
    Location:
    United Kingdom
    #4
    I just thought I'd add that the most important factor in evaluating the possible real world performance of an SSD is the read speed. This determines how quickly things like the OS startup and program opening will be. I presume this is why you chose an SSD in the first place anyway.
     
  5. drsox thread starter macrumors 65816

    drsox

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    #5
    Yes, thanks. I knew that, but the file write rates for big files did seem to be slow on this new Mini. Now I know why. I've been using SSDs for more than 5 years and I would never go back to HDDs for OS/programme files for just that reason.
     
  6. blanka macrumors 68000

    Joined:
    Jul 30, 2012
    #6
    That is the weird thing with the 840 series. It is completely different on write performance compared to the old 830 and the 840pro. Especially the smaller ones.
     
  7. drsox, May 22, 2013
    Last edited: May 22, 2013

    drsox thread starter macrumors 65816

    drsox

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    #7
    I think that's why I was surprised - I had an 830 and would have expected the 840 to be better. I think I'll look at swapping out for the 840 pro.
     
  8. venom600 macrumors 6502a

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    Mar 23, 2003
    Location:
    Los Angeles, CA
    #8
    Another thing to consider is that black magic isn't a good indicator of SSD speed all the time. My Intel 330 SSD scores low in writes because the drive natively compresses content on the fly. Since black magic tests video write performance, and video is already compressed, it writes much more slowly.
     
  9. dmk1974 macrumors 68020

    dmk1974

    Joined:
    Sep 16, 2008
    #9
    I am going to be upgrading my 2012 Mac Mini today and have 2 SSD drives that are currently in Windows PC's that I am going to choose from.

    128 GB Samsung 830 SSD
    240 GB Intel 330 SSD

    In Windows, I think they bench about the same. Per threads I've searched, with BlackMagic, the Sammy is pretty fast. Just haven't found actual numbers on the Intel 330.

    I don't need a ton of space on the OS drive since I have an external USB 3.0 drive connected for all my media. Just want to pick whichever one will be faster. Thanks!
     
  10. willgreene99 macrumors regular

    willgreene99

    Joined:
    Dec 16, 2010
    Location:
    DFW
    #10
    I just completed upgrading my Mac Mini 6,2 with dual Samsung 840 Pro's 256GB. Wow, compared to the stock 5400rpm drives, it is like a totally new feeling. I followed the instruction on OWC's website and it was accurate except for the part about removing the wi-fi/bluetooth antenna. There is a double layer black sticky cover over the connector. Other than that, everything else was spot on. I installed ML and all of my apps. Ran Black Magic and getting read speeds of 469MB/s and write speeds of 502MB/s.

    This upgrade was definitely worth it. I bought the drives at Fry's for $240 each.
     

    Attached Files:

  11. dmk1974 macrumors 68020

    dmk1974

    Joined:
    Sep 16, 2008
    #11
    Here's the BlackMagic DiskSpeedTest result I got a few weeks ago with the 240 GB Intel 330 SSD drive inside. Anyone have a screen shot for a 128 GB Samsung 830 in a 2012 Mac Mini? Thanks!
     

    Attached Files:

  12. drsox thread starter macrumors 65816

    drsox

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    #12
    deleted
     
  13. DanFromNYC macrumors newbie

    Joined:
    Jul 5, 2013
    #13
    Performance is slow

    I recently upgraded my mac mini late 2012 with the Samsung 840 pro 512g. I bought the mac mini with the fusion drive but i ran out of space so i purchased the new drive and installed it with the existing apple cables and the new hard drive.

    1) I did not create new fusion drive
    2) I cloned my hard drive.
    3) I ran the blackmagic performance test
    Write: 100
    Read: 300

    Can anyone give me any suggestions on how to improve my SSD read/write performance?
    Thanks
    Dan
     
  14. flottenheimer macrumors 65816

    flottenheimer

    Joined:
    Jan 8, 2008
    Location:
    Up north
    #14
    Bump (since I am seriously SSD excited right now).

    Just installed the Samsung 840 Pro 512 GB SSD in my 15", Medio 2012 MacBook Pro (2.3Ghz, i7, 8GB RAM, Hires)

    BlackMagic scores
    Write: 489 MB/s
    Read: 512 MB/s

    Wow. Loving my MacBook — it is a beast reborn.
     
  15. drsox thread starter macrumors 65816

    drsox

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    Apr 29, 2011
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    Xhystos
    #15
    Good for you.
     
  16. Geron macrumors newbie

    Joined:
    Dec 14, 2013
    #16
    Get yourself a TRIM enabler. It changed the performance of mine drastically.
     
  17. kaibob macrumors regular

    Joined:
    Jun 21, 2010
    Location:
    Prescott, Arizona
    #17
    I recently switched to an SSD boot drive in a USB 3.0 docking station and thought I would post my results. I did not want to start a new thread and instead added to this older one.

    My equipment is:

    2012 base Mac mini upgraded with 16-GB of memory

    Plugable USB 3.0 Lay-Flat docking station from Amazon

    Samsung 128-GB 840 Pro

    I used SuperDuper to clone from the internal hard drive to the SSD. I then reset the start-up disk in system preferences to the SSD.

    The computer boot time went from 30 to 20 seconds--I had expected a greater difference. Blackmagic results are 433 MB/s read and 424 MB/s write. The read speed is in line with Anandtech test results, but the write speed is a bit higher. In day to day use, the computer is noticeably more responsive, and the docking station appears to sleep when expected. All in all, a good result.
     

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