Samsung SSD 950 PRO 512GB M.2 NVMe PCIe SSD Review

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IOMeter 4KB Random Performance

Our 4KB random performance test is conducted in the same manner as our sequential tests, but once the drive is conditioned we run our saved random test profile that runs our 4KB test for two minutes without any idle time in between the tests. The queue depth is set to 32 on four workers and the test is begun. To get the benefits from NVMe based drives you must use multiple CPU queues and this is why we are now using four workers for this IOMeter test.

4kb-iops

IOPS is the main thing we are looking at in this test scenario and the Samsung SSD 950 Pro 512GB drive is rated at up to 300,000 IOPS for the 4K Random Read and 110,000 IOPS for the 4KB Random Writes. On our properly conditioned drive we hit 309,000 IOPS Read and 84,000 IOPS Write. Our 4K Random Read result was spot on, but our 4K Random Write result was over 23% lower than expect for reasons we were unable to explain.

iometer-4kb-mb

When it comes to MBps you are looking at 1266 MB/s on the 4KB Random Reads and 344 MB/s on the 4KB Random writes.

iometer-4kb

The response times on the SSD 950 Pro 512GB M.2 SSD were just 1.5ms for writes and 0.4ms for reads, which is great for a PCIe storage drive.

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  • Can this be used to boot win7 in asus rampage 4 extreme (x79) board? If yes does it supports both legacy and uefi installs?

  • When I built my new system it required me to goto win10 which has and included NVMe driver. I’m happy, and will be adding one to my Gigglebyte GA-Z170XX-UD5 Mobo when the price starts coming down… feel free to dm me if you have questions. Like the man sez, BE SURE YOUR BOARD SUPPORTS NVMe before you buy!

  • GrandBro

    Do you simply plug this into a PCIe? I understand some newer MB have a M.2 slot, so it’s confusing. The Intel 750 for example has what looks like a card (PCIe version) and one that looks like SATA/SAS. I’d buy one of these to fit on a 1 year old MB without M.2 if it will work.

    • No, you can’t just plug it into a PCIe slot. You’re going to need an
      adapter. The Addonics one seems to be well-regarded. If you intend to use the SSD
      as a boot drive, make sure your mobo supports it.

      Other than those caveats, you should
      be fine.

      • Κωνσταντίνος Κ.

        he actually needs a UEFI bios with capability of booting into nvme 😛

        P.S. Else it can be only used as a secondary drive

        • Did you even read my comment???

          “If you intend to use the SSD
          as a boot drive, make sure your mobo supports it.”

          Jesus Christ…

        • Κωνσταντίνος Κ.

          Did you even read what I wrote? Jesus Christ

        • Yep, but you didn’t read what I wrote. Here it is a third time, goof. Have someone read it to you, if you’re incapable.

          “If you intend to use the SSD
          as a boot drive, make sure your mobo supports it.”

  • Minkyu Kim

    If you finding a tool to get SMART with Samsung NVMe devices, Naraeon NVMe Tools can be reasonable option.
    http://naraeon.net/en/latest-nvme-tools

  • z3razerviper

    I am not going back to anything that does not have eDrive support its awesome guess i will be waiting a while.

  • Austin Rowan

    Being a future-minded fellow, hearing about this tricky warranty has ensured me not buying this product nor recommending it to the myriad of people in my life who ask me for computer advice.

    • xanuser

      what would be tricky is finding an actual user that would ever approach 200TB of writes in under 5 years.

  • Gary Barnet

    I have been using a XP941 for a while now and found it throttled all the time due to overheating. But I bought a small heatsink and fan (originally designed for the second edition Raspberry Pi as part of a kit) and mounted the fan/heatsink onto the controller and another heatsink onto the other smaller chip next to it and problem solved. I should also say that I have a 200mm fan blowing directly over the area (and 3 other 140mm intake fans nearby as well).
    Heat is a huge problem for these M.2 drives (even companies like Noctua have noted this) and I have seen temperatures of 110° C or more (max being around 113°C) and that is just copying some files over. And the SM951 was not that much different. So to is this one. Even though they heat up, at least the memory chips don’t get anywhere near as hot, it is the controller that has to do all the heavy lifting that suffers the most.

    Get the heat under control and these are great.

    Just wondering how these will go squashed up in a notebook or similar.

  • Ottoore

    Thank you Nathan for the deepened tests about thermal problem. I wrote you about this when they were presented.
    I have a question: you say you solved the problem with a 120mm fan. But 512 ssd has memories on both sides. Obviously there’s no cooling on the “dark side”: do you think memories on the frontal side have a ” sort of priority “? Sorry for my bad english, i’m not native

    • Nathan Kirsch

      Your edit is correct and there are images of the front and the back of the SSD 950 Pro 512GB on page 1 of the article. The board components are on just one side, so that design should be better for those wanting to use their motherboards built-in M.2 slot that sits flush with the board.

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