Dell TB3 NVMe 512GB SSD - my impressions

Discussion in 'Mac Accessories' started by vip007, Sep 21, 2018.

  1. vip007, Sep 21, 2018
    Last edited: Sep 21, 2018

    vip007 macrumors newbie

    Joined:
    Dec 16, 2006
    #1
    A few weeks ago I purchased a new Dell Thunderbolt 3 NVMe SSD drive, SD1-T0500, for my 2017 iMac with 1TB fusion drive. The idea was to have a fast(er) boot drive from this external storage unit without having to open up my iMac and install a larger internal NVMe.

    The SSD is supposed to be quite speedy, 2,800MB/s read and around 1,000MBs for write, according to some tests and specs. It is based on KXG50ZNV512G NVMe TOSHIBA 512GB. I formatted the drive as APFS and did a new OS install, High Sierra 10.13.6.

    Here are my first observations:
    • Blackmagic 5TB speed test reports no more than 500MBs write and about 2350MBs read. So about half as fast as advertised write speeds. I tired different stress settings in Blackmagic and all result in similar performance. Is this reduced performance possibly related to APFS?
    • The drive is NOISY! It has an internal fan that comes on every few seconds and it is quite loud. One can easily hear it in a silent room. There does not seem to be any way to control the fan.
    • I experienced several kernel panics, presumably caused by this drive (NVMe-related). Eventually, I turned off hard disk sleep in Energy Saver settings and that seems to have fixed the problem.
    Overall, I am fairly happy with the drive (it is amazingly small and fast), but the noise slightly annoys me.

    I was wondering if anyone else has this drive and what your own experience may be?
     
  2. ECJ macrumors 6502

    ECJ

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    #2
  3. vip007 thread starter macrumors newbie

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    Dec 16, 2006
    #3
    Thanks for this pointer!

    The cable I used is the one that came with the drive, so I presume it should be TB3. Firmware update is something to look into... once I have Windows installed.
     
  4. StellarVixen macrumors 68000

    StellarVixen

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    #4
    Well, in my humble opinion, that is disappointing, and false advertising. You do not get what you supposedly pay for.
     
  5. ECJ macrumors 6502

    ECJ

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    #5
  6. Rockadile macrumors 6502

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    #6
    Maybe some kind of external bandwidth / overhead limit.
    If you use encryption, that will also lower speeds.
     
  7. irshaidt macrumors newbie

    irshaidt

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    #7
  8. Mr. Retrofire macrumors 603

    Mr. Retrofire

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7 September 21, 2018